CN203392987U - Z-type integrated sewage treatment pond employing gas stripping reflux and two-stage precipitation - Google Patents
Z-type integrated sewage treatment pond employing gas stripping reflux and two-stage precipitation Download PDFInfo
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- CN203392987U CN203392987U CN201320502499.7U CN201320502499U CN203392987U CN 203392987 U CN203392987 U CN 203392987U CN 201320502499 U CN201320502499 U CN 201320502499U CN 203392987 U CN203392987 U CN 203392987U
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Abstract
The utility model relates to a Z-type integrated sewage treatment pond employing gas stripping reflux and two-stage precipitation. A rectangular pond body of the Z-type integrated sewage treatment pond comprises a grafting settling pretreatment zone, an anoxic zone, an aeration zone, a clarifying reflux zone, an inclined pipe/plate settling zone, a contact disinfection channel and the like, wherein a horizontal slit gas-water separator, a Z-shaped partition wall, planar-type gas stripping micro-power reflux devices and an L-type hydraulic mixing spiral flow generator are also arranged besides conventional water treatment equipments inside the pond; the planar-type gas stripping micro-power reflux devices are fully paved in a horizontal manner. The Z-type integrated sewage treatment pond has the advantages that the structure is simple, convenient and compact; nitrogen and phosphorus removal, two-stage precipitation and disinfection treatment are finished in the same pond. Compared with a plurality of independent small pond bodies adopted in the conventional technology, the Z-type integrated sewage treatment pond has the advantages of being low in investment, small in floor area, less in medicine consumption, less in discharged sludge, low in energy consumption cost, stable and controllable in water quality, simple and convenient to run and manage, and the like, and especially adapts to integrated treatment of nitrogen and phosphorus removal of the sewage at a scale of 10000t per day or less.
Description
Technical field
The utility model relates to a kind of integrated sewage water treating pond, particularly utilize air lift principle and two-stage precipitation principle simultaneously, utilize the ingenious structure of the upper and lower both sides of Z-shaped partition wall spatial complementary, realize the treatment tank of high efficiency denitrogenation dephosphorizing function and integrated compact design.
Background technology
Conventional sewage water treatment method is to take biochemical process as main, i.e. activated sludge process and the large class of biomembrance process two, and wherein activated sludge process is the most widely used a kind of two stage biological treatment process in current countries in the world.Previous Activated Sludge Process is mainly to remove organic pollutant, enters into comprehensively and should remove organic pollutant at present, again the operation stage of denitrogenation dephosphorizing.Activated sludge process denitrification dephosphorization technique principle is all substantially similar, but manifestation has multiple, at present conventional have A/A/O technique, UCT technique, modified form Carrousel (Carrousel) oxidation ditch process, AB method technique, SBR technique, CAST technique, Unitank technique, MBR technique, a MSBR technique etc.Conventional activated sludge method technique mostly first will be through pre-treatment or/and the coagulation of primary sedimentation pond precipitation, then enter aeration tank and carry out secondary biochemical treatment, enter afterwards secondary sedimentation basins and carry out mud-water separation, clear water sterilization discharge, precipitating sludge is got back in aeration tank and is recycled by reflux pump, and small part mud carries out thickening disposal as excess sludge.Above-mentioned very complicated common process, also will add denitrogenation dephosphorizing function, thereby the overall craft complex that becomes, and flow process is longer, processes structures more.For extensive sewage disposal, still can accept; For middle and small scale, indiscriminately imitate above-mentioned way just very inadequate, therefore, must search out the activated sludge process denitrogenation dephosphorizing new process that is applicable to middle and small scale.
For middle and small scale sewage disposal, utility model patent " Double-side diversion biological sewage disposal technology and sewage disposal device thereof " (publication number CN 1223972A, open day 1999.7.28), its equipment is by dashpot, aeration tank, the compositions such as settling bowl, this equipment is darker cone bucket shape, width ratio is not enough, limit by structural shape and cone bottom sloping, not only can not be amplified to the conventional small-scale of 100～10000 ton per days, and can only remove organic pollutant and ammonia nitrogen, the operation logic of this equipment determined its can not denitrogenation (total nitrogen) more cannot dephosphorization, effluent quality nitrogen phosphorus index does not meet the existing discharging standards of China, cause rather than sewage denitrification and dephosphorization equipment.
Utility application " a kind of sewage biochemical treatment integrated apparatus, system and processing method " (publication number CN 102923908A, open day 2013.2.13), the small-scale sewage denitrogenation dephosphorizing needs that substantially can adapt to 1500 ton per days and following scale, but this device is difficult to continue to amplify, and Nitrogen/Phosphorus Removal needs further to improve.Major cause is after this device continues to amplify, oblique diaphragm will be further upward to prolongation, cause the power of the mud shortage horizontal direction of distant place more to come near being difficult to arrive vertical air lift reflux assembly, there will be mud that sludge reflux brings the not in time problems such as floating, anaerobic gas generation floating or dead corruption floating that lose activity, then have a strong impact on effluent quality; Simultaneously, this device makes vertical air lift reflux assembly one side because volume is little be all aeration biochemical district, there is no to utilize the preposition anoxic denitrification district of sewage self carbon source, can only rely on the anoxic denitrification of the inner anoxic denitrification of granule sludge and the shortage carbon source of vertical air lift reflux assembly opposite side postposition, thereby denitrification effect also has the space further promoting; In addition, the medicament flocculation reaction of precipitation assembly below is insufficient inhomogeneous, makes dosing more, and scale is amplified rear water distribution deleterious, thereby phosphor-removing effect also has with other amounts of residual contamination removal effect the space further promoting.
Utility model content
The purpose of this utility model be to propose a kind of simple and effective, can meet denitrogenation dephosphorizing and require the integrated sewage water treating pond with all other water-quality guideline stably reaching standards, to be widely used in the denitrification and phosphorus removal integration of 10,000 ton per days and following scale sewage, process.
The utility model Z-type stripping reflux two-stage precipitation integral treatment tank, comprise rectangle form pool body 1, the vertical partition wall middle part lower position being divided in pond body 1 between oxygen-starved area 4, aeration zone 7, clarification recirculating zone 10, inclined tube /Ban settling region 17 and contact sterilizing Qu23， aeration zone 7 and clarification recirculating zone 10 is provided with horizontal bar seam air water separator 9; Between clarification recirculating zone 10 and inclined tube /Ban settling region 17, be provided with Z-shaped partition wall 11; In clarification top position, interior middle part, recirculating zone 10, be provided with the face formula air lift microkinetic return channel 13 that level completely spreads installation; In inclined tube /Ban settling region 17 lower floors, be provided with L-type waterpower and mixed spigot 16.
Described horizontal bar seam air water separator 9, for being horizontally disposed with, only allows mud mixture to pass through from vertical partition wall hole during operation.This air water separator 9 is to utilize bubble upflow velocity higher than realize the easy tripping device of bubbles escape under current to flow velocity, several interconnective plates, consists of.Specifically comprise rising flow guiding inclined plate, vertical stabilier, horizontal fixed base plate, the heavy mud plate of oblique water conservancy diversion and deep floor, described horizontal fixed base plate is fixed on partition wall hole lower surface by fixation kit, horizontal fixed base plate is connected with the bottom of rising flow guiding inclined plate, and rising flow guiding inclined plate top is connected with vertical stabilier bottom; Oblique water conservancy diversion Chen Niban one end is connected with rising flow guiding inclined plate, and the other end is connected with horizontal fixed base plate; Deep floor one end is connected with vertical stabilier, and the other end is connected with horizontal fixed base plate.Described rising flow guiding inclined plate is tilted towards aeration tank, and the angle of rising flow guiding inclined plate and horizontal plane is 50 °～60 °.Described vertical stabilier top is suitable for reading higher than partition wall hole, and the angle of vertical stabilier and horizontal plane is 75 °～90 °.The angle of the heavy mud plate of described oblique water conservancy diversion and horizontal plane is not less than 40 °.
Described formula air lift microkinetic return channel 13 is a kind of devices that utilize air lift principle to promote mud, by sewage work's aeration blower, provide source of the gas, through the gas stripping of this air-lift device by clarification recirculating zone 10 in mud general equilibrium in suspended state be back to aeration zone 7.The airtight casing of suction pipe, surrounding, air nozzle, standpipe elbow, backflow inclined tube, backflow wall pipe and the pond external compression air control unit that specifically comprise inlet pipe, termination sealing; The suction pipe of described termination sealing is and on the suction pipe that suction pipe that UNICOM in length and breadth arranges the sealing of ，Ge termination is positioned at the sealing of same level ，Ge termination, is uniformly distributed a plurality of mud apertures that enter; The whole medium position of the suction pipe sealing in termination is provided with the airtight casing of surrounding, establishes the single or multiple air nozzles that are connected with inlet pipe in the airtight casing of surrounding, and the airtight casing of surrounding top is connected with one end of standpipe elbow; The other end of described standpipe elbow is connected with backflow inclined tube and backflow wall pipe successively, at the bottom of the outlet pipe of described backflow wall pipe a little less than the water surface or and water surface hold the line; Described pond external compression air control unit and inlet pipe are connected.The suction pipe any place pipeline section area of described termination sealing, what be greater than that this cross section serves enters mud aperture area sum.The horizontal depth of immersion of the suction pipe of described termination sealing be less than pond, place dark 1/2nd.
The spout that described L-type waterpower has been mixed spigot 16 is horizontal direction, and spout is positioned at middle part or the bottom of inclined tube /Ban settling region 17 below suspended sludge layers.It is to utilize spray waterpower mixing effect, inner perforated plate waterpower mixing effect, the effect of inner tubular type static mixing and last nozzle ejection waterpower to mix that L-type waterpower has been mixed spigot 16, thereby reaches the function that water and the quick well-mixed object of medicament and suspended sludge layer 18 slow circumvolves are realized contact flocculation.Specifically comprise water-in standpipe, diversion box and attached wall inclined tube, described water-in standpipe is connected with attached wall inclined tube with the horizontal pipeline section on both sides successively respectively after diversion box shunting, attached wall inclined tube is connected again and with the L shaped bend pipe of reducing nozzle, and described two L shaped bend pipes are asymmetric arrangement.In described diversion box, establish double-deck perforation plate, the setting of staggering of the aperture of double-deck perforation plate.In described attached wall inclined tube, establish 1～3 grade of spiral stator blades, every grade of stator blades by 1～3 mutual overlap joint and spatial vertical forms, and current generation spiral is advanced; Between adjacent level spiral stator blades, keep certain distance.The reducing nozzle of described two L shaped bend pipe ends is positioned on same horizontal plane also separated by a distance, and the emission direction of two reducing nozzles is 90 ° vertically.
The working process of the utility model Z-type stripping reflux two-stage precipitation integral treatment tank is such: generally, sewage, before entering this integrated pond, has passed through coarse rack debris retaining and sewage pump and promoted.Sewage enter first successively pond body 1 front end compared with fine fack 2 and sand setting canal 3, removing thin slag and can sink that particle sand grains is laggard to be entered preposition oxygen-starved area 4 and carry out biochemical treatment.In oxygen-starved area, 4 lower floors are provided with agitator 5, both prevented sludgd deposition, make again nitrification liquid, active sludge and sewage three fully mix, the interior denitrifying bacteria in oxygen-starved area 4 utilizes carbon source in sewage to complete rapidly and efficiently denitrification reaction, and nitrification liquid is from follow-up aeration zone 7.Then sewage enter into aeration zone 7 and carry out aerobic treatment under overall plug-flow effect, completes organic pollutant degradation, ammonification is nitrated and biological phosphate-eliminating under active sludge microorganism effect.Nitration reaction product nitrification liquid, under the gas stripping of bubble upwelling, 4 carries out denitrification denitrogenation reaction from topmost surface automatic back flow to oxygen-starved area again, finally generates nitrogen (N
2) spilling into atmosphere, iterative cycles like this, realizes the object of abundant denitrogenation, contaminant degradation and the biological phosphate-eliminating of sewage.Subsequently, muddy water gas three-phase mixture, after horizontal bar seam air water separator 9, only has muddy water mixed solution to enter clarification recirculating zone 10 and carries out mud, water natural separation.Supernatant liquid overflows through one-level water leg 12; The face formula air lift microkinetic return channel 13 that middle level clarification active sludge is installed through level is back to aeration zone 7 and oxygen-starved area 4, is again that iterative cycles like this obtains high concentration particle active sludge; The active poor mud of bottom is discharged by excess sludge pipe 14, realizes the object that biological phosphate-eliminating rich phosphorous sludge is got rid of from system.The inclined tube /Ban settling region 17 that enters the second stage through the clear liquor of first step nature clarifying treatment, carries out chemical dephosphorization and co-coagulation precipitation process by 15 dosings of medicament spray equipment.In L-type waterpower, mixed under the hydraulic action of spigot 16, then there is sufficient contact flocculation reaction and precipitate in suspended sludge layer 18 slow circumvolves, in the inclined tube in remaining fine particle pollutent Jiang middle layer/plate precipitation assembly 19, further precipitation is removed, clear water after precipitation overflows from secondary water leg 20, through sterilizing agent, add pipe 24 and add sterilizing agent, and in contact sterilizing canal 23 with sterilizing half an hour of sterilizing agent continuous contact after, finally by discharging after water outlet open-channel meter 25 on-line monitorings and metering.
The utility model Z-type stripping reflux two-stage precipitation integral treatment tank, has following five remarkable technical superioritys:
The one, function division is clear and definite: in integrated pond, 6 major function differentiation works are clear and definite---pretreating zone, oxygen-starved area, aeration zone, clarification recirculating zone, settling region, sterilizating area.Pretreating zone is grid and sand setting, prevents that follow-up facilities and equipment from stopping up wearing and tearing; Preposition oxygen-starved area is realized denitrification denitrogenation and is not needed additional carbon; Aerobic aeration district is most important main body, completes that ammonification is nitrated, contaminant degradation and part biological dephosphorization; The muddy water natural separation of the first step is realized in clarification recirculating zone, supernatant liquid enters next procedure, middle level clarification mud air lift is back to aeration zone and high concentration particle active sludge operating mode is realized in oxygen-starved area, and bottom mud is back to inlet water lifting pumps room as excess sludge discharge and a part; The inclined tube /Ban settling region of the second stage is under dosing coagulation, play the collaborative up to standard effect of making a final check of chemical dephosphorization and all other water-quality guideline, if adopt the agent of compound diatom local medicine precipitating sludge can all be back to forebay, inlet water lifting pumps room and recycle in biochemical treatment tank; End sterilization canal and metering open channel are the integral parts of integrated pond, avoid building separately and to take up an area more investments larger.6 large functional zone are melted in 1 integrated pond of the present utility model, have significantly saved land used, have saved construction costs, have facilitated operational management.
The 2nd, the face formula air lift microkinetic return channel that level is installed is better than sludge reflux pump comprehensively: 1. face formula air lift microkinetic return channel suction pipe horizontal interval Man Pu is installed on top position, middle part, clarification recirculating zone, non-blind area is without dead angle, reflux balanced, backflow route is short, returned sluge concentration is high, and quantity of reflux can intuitively regulate and control by air demand; 2. stripping reflux energy consumption is low, belongs to microkinetic and refluxes, and according to relevant experimental data, shows, the energy-conservation 65%(of the electronic reflux pump of stripping reflux energy loss-rate notes: at air lift depth of immersion 2.4m, during air lift lift height 0.6m, reach 0.38m
3the air lift flow of/min, impeller pump needs 1.60kW, the gas blower wasted work of air-lift device conversion is 0.56kW only); 3. stripping reflux belongs to gentle reflux, without impeller high-speed motion, active sludge flco structure can not be crashed to pieces, mud is after multi-reflow circulation, floc particle collides repeatedly and intensity is unlikely to breakage of particles, the closely knit aerobic particle mud of final formation, the seed activity mud of high density is realized synchronous nitration and denitrification in biochemical reaction zone, has increased substantially nitric efficiency; 4. face formula air lift microkinetic return channel in pond without motor or mechanical movable part, not fragile, reliable and stable.
The 3rd, the mud-water separation of clarification recirculating zone does not consume energy, without dosing, efficiency is high: settling section is different from circulatior clarifier, the utility model is without hydrojet is provided, only with original creation Z-shaped curtain wall structure and by action of gravity, can realize mud-water separation, its principle is that muddy water mixed solution is in traveling process from bottom to top, variable cross-section water body upflow velocity slows down gradually, in certain height location current lift velocity and granule sludge sinking velocity, reach balance, this height location will form active sludge suspended layer automatically, utilize filtration and the net of active sludge layer to catch interception function, reach good mud-water separation effect.Therefore, before clarification mixed solution suspended substance (MLSS) concentration be 3000～9000 mg/L or more than, after clarification, clear liquor suspended substance (SS) concentration drops to 100 mg/L 20mg/L even below, clarifying efficiency is more than 97%.
The 4th, chemical feeding quantity small band is carried out series of advantages: 1. owing to only need the clear liquor of suspended substance (SS) concentration below 100 mg/L being carried out to dosing, thereby added amount of chemical is little, medicine consumption cost is low, be different from general secondary biochemical technique completely in biochemistry pool or dosing is carried out to the mixed solution of 3000～4500mg/L left and right in second pond ingress, concentration higher position chemical feeding quantity is large, and cost is high; 2. the active sludge because of stripping reflux does not just have dosing at all, does not just have the inhibitory effect problem of medicament to biochemistry pool active sludge; 3. the chemical sludge amount that produced is little, thereby does not increase follow-up sludge treatment difficulty, and reason is that chemical sludge water ratio is high, more difficult; Even if the utility model medicament mud is all back to biochemical treatment system, because total amount is little, add that timely discharge excess sludge does not affect biological activity substantially yet; 4. the utility model can be by compound diatom local medicine agent chemical flocculation precipitation mud fully recovering to Biochemistry Reaction System, the amounts of residual contamination absorbing in medicament mud is removed through biochemical reaction, chemical dephosphorization throw out is together with the rich phosphorus thalline of biological phosphate-eliminating mud, finally by clarification recirculating zone bottom, with excess sludge form, discharge system, thereby the water ratio of mud is able to remarkable reduction, removed the sorrow of independent chemical sludge thickening.
The 5th, without arranging separately specially, need extra occupation of land and complicated coagulation workshop section.The utility model is provided with L-type waterpower in inclined tube /Ban settling region lower floor and has mixed spigot, utilize medicament spray equipment and hydraulic action confection, and under hydraulic action, make suspended sludge layer slow circumvolve spiral, then there is sufficient contact flocculation reaction and precipitate, in the inclined tube/plate in remaining fine particle pollutent Jiang middle layer, further precipitation is removed, thereby realizes total phosphorus (TP) and all other water-quality guideline as suspended substance (SS), five-day BOD (BOD
5), the object of the stably reaching standard such as chemical oxygen demand (COD) (COD).It is simple, practical, effective that L-type waterpower has been mixed spigot, utilizes contact flocculation principle to reduce medicine consumption, reduced chemical mud amount.Meanwhile, in two-stage settling region, L-type waterpower has been mixed spigot and whole mud discharging devices, and equal machinery-free movable part under water, without motor-driven, without devices such as sludge pump or mud scrapers, not only energy-efficient in pond, and without maintenance capacity, use cost is low, and operational administrative is simplified, and construction investment is low.
The advantage of the utility model Z-type stripping reflux two-stage precipitation integral treatment tank is:
The firstth, nitric efficiency is high: under gas stripping, sewage and active sludge iterative cycles under anoxic/aerobic environment is processed, and the repeatedly stripping reflux circulation of active sludge You settling section/biochemical zone, the aerobic particle mud that final formation particle diameter is large, density is high, sewage is under macroscopical anoxic and two kinds of anoxic conditions of microcosmic anoxic, utilize nitrifier and denitrifying bacteria in granule sludge, realize high efficiency aerobic nitrification reaction and two-forty anoxic denitrification denitrification reaction, denitrogenation flow process is short, power consumption is few, ammonia nitrogen (NH
3-N) and the denitrification effect of total nitrogen (TN) good, particularly water outlet total nitrogen (TN) is easier to up to standard than other techniques;
The secondth, dephosphorization is thorough: on the basis of A/O biological phosphate-eliminating, be aided with chemical dephosphorization.The excessively picked-up under the oxygen supply effect of aeration zone of polyP bacteria (PAB) microorganism surpasses the phosphorus of its physiological requirements, and pollutent obtains aerobic degradation simultaneously, and the rich phosphorous sludge of generation is realized dephosphorization with excess sludge form discharge system.When sewage phosphorus concentration is higher while surpassing biological phosphate-eliminating limit, with chemical precipitation method, carry out chemical dephosphorization aftertreatment, through this integrated pond lower concentration clear liquor is carried out to dosing, by L-type waterpower, mixed that slow eddy flow that spigot produces carries out contact flocculation and inclined tube/plate precipitates, total phosphorus (TP) and other amounts of residual contamination are as five-day BOD (BOD
5), the index such as chemical oxygen demand (COD) (COD), suspended substance (SS) is all by whole stably reaching standards.The two-stage precipitator method are supplementary means of the present utility model and last Means of Ensuring.
The 3rd is engineering technological economy remarkable benefit: the utility model utilizes Z-shaped structure and air lift principle by ingenious being melted into a whole in sewage disposal six functions district, obviously improved the technical economic benefit of 10,000 ton per days and following scale sewage denitrification and dephosphorization, no longer need to disperse to build the pond structures of numerous small volumes " Rubis Class Nuclear Attack Submarine ", not only obviously saved investment, save land used, and facilitated operational management.
Above-mentioned every advantage fully shows, the utility model Z-type stripping reflux two-stage precipitation integral treatment tank, obviously shortened sewage disposal denitrification dephosphorization technique flow process, compare with techniques such as conventional A/A/O technique or modified form Carrousel (Carrousel) oxidation ditches, not only denitrogenation dephosphorizing efficiency is high, water conditioning is up to standard secure, and features simple structure is compact, take up an area that scalp is economized, the few spoil disposal of medicine consumption is few, energy consumption low-cost low, operational administrative is simple, be adapted in China's vast small towns sewage disposal and novel Urbanization Construction in widespread use.
Accompanying drawing explanation
Fig. 1 is the FB(flow block) of the utility model Z-type stripping reflux two-stage precipitation integral treatment tank.
Fig. 2 is the structural representation of the utility model Z-type stripping reflux two-stage precipitation integral treatment tank.
Fig. 3 is the floor map of the utility model Z-type stripping reflux two-stage precipitation integral treatment tank.
Fig. 4 is the structural representation of horizontal bar seam air water separator.
Fig. 5 is the structural representation of face formula air lift microkinetic return channel.
Fig. 6 is the vertical view of face formula air lift microkinetic return channel.
Fig. 7 is the structural representation that L-type waterpower has been mixed spigot.
Fig. 8 is the right view that L-type waterpower has been mixed spigot.
Fig. 9 is the vertical view that L-type waterpower has been mixed spigot.
Wherein: 1-pond body, 2-grid, 3-sand setting canal, 4-oxygen-starved area, 5-agitator, 6-auxiliary impeller, 7-aeration zone, 8-aerating apparatus, 9-horizontal bar seam air water separator, 10-clarification recirculating zone, 11-Z-shaped partition wall, 12-one-level water leg, 13-face formula air lift microkinetic return channel, 14-excess sludge pipe, 15-medicament spray equipment, 16-L-type waterpower has been mixed spigot, 17-inclined tube /Ban settling region, 18-suspended sludge layer, 19-precipitation assembly, 20-secondary water leg, 21-reflux sludge tube, 22-tinted shade, 23-contact sterilizing canal, 24-sterilizing agent adds pipe, 25-water outlet open-channel meter,
The heavy mud plate of 901-rising flow guiding inclined plate, 902-vertical stabilier, 903-horizontal fixed base plate, 904-oblique water conservancy diversion, 905-deep floor, 906-fixation kit, 907-partition wall hole;
1301-inlet pipe, the suction pipe of 1302-termination sealing, the airtight casing of 1303-surrounding, 1304-air nozzle, 1305-standpipe elbow, 1306-backflow inclined tube, 1307-backflow wall pipe, 1308-pond external compression air control unit, 1309-enter mud aperture;
1601-water-in standpipe, 1602-diversion box, 1603-double-deck perforation plate, 1604-attached wall inclined tube, 1605-spiral stator blades, 1606-L shaped bend pipe, 1607-reducing nozzle, 1608-strut member.
Embodiment
Embodiment mono-
Contrast accompanying drawing below, in conjunction with certain Small Town Wastewater, process and adopt the utility model Z-type stripping reflux two-stage precipitation integral treatment tank as embodiment simultaneously, the utility model is described further.
As shown in the FB(flow block) of Fig. 1, the technical process of the utility model Z-type stripping reflux two-stage precipitation integral treatment tank is simple and direct smooth and easy, accomplish without any letup, only need in same pond, can realize denitrogenation dephosphorizing global function, " the urban wastewater treatment firm pollutant emission standard " that reaches this project demand be one-level B standard (GB18918-2002), and can steady running, system is not established internal reflux pump, also without external reflux pump, (sludge quantity is few, can directly use total water inlet sump pump promotes), management is simplified.
As shown in the floor map of the structural representation of Fig. 2 and Fig. 3, the utility model Z-type stripping reflux two-stage precipitation integral treatment tank, along sewage flow direction, see, integrated pond 1 comprises 6 functional zone: pretreating zone, oxygen-starved area 4, aeration zone 7, clarification recirculating zone 10, inclined tube /Ban settling region 17 and sterilization exhalant region, water level successively from high to low.Wherein origin or beginning pretreating zone is grid 2 and sand setting canal 3, and end sterilization exhalant region is contact sterilizing canal 23 and water outlet open-channel meter 25.
The technical process that this integrated pond sewage denitrification and dephosphorization is processed is described as follows:
1, pretreating zone: sewage enter first successively this integrated pond 1 front end compared with fine fack 2 and sand setting canal 3, removing thin slag and can sink that particle sand grains is laggard to be entered preposition oxygen-starved area 4 and carry out biochemical treatment.
2, oxygen-starved area 4: sewage is 4 aerations not in oxygen-starved area, its lower floor is provided with agitator 5 and had both prevented sludgd deposition, make again nitrification liquid, active sludge and sewage three fully mix, its denitrifying bacteria utilizes carbon source in sewage to complete rapidly and efficiently denitrification reaction, and nitrification liquid is from follow-up aeration zone 7.Need to strengthen biological reaction tank activated sludge concentration during low temperature in the winter time, and now in order to meet total nitrogen requirement up to standard, may need regularly to open auxiliary impeller 6, winter low temperature high viscosity nitrification liquid will forcibly be back to preposition oxygen-starved area 4.
3, aeration zone 7: sewage enters into successively again aeration zone 7 and carries out aerobic treatment under plug-flow effect, complete organic pollutant degradation, ammonification is nitrated and biological phosphate-eliminating under active sludge microorganism effect.Nitration reaction product nitrification liquid is under the gas stripping of aerating apparatus 8 blast aeration bubble upwellings, from topmost surface automatic back flow to oxygen-starved area, 4 carry out denitrification denitrogenation reaction again, the final nitrogen that generates spills into atmosphere, like this iterative cycles, realizes the object of abundant denitrogenation, contaminant degradation and the part biological dephosphorization of sewage.
4, clarification recirculating zone 10: muddy water gas three-phase mixture is after horizontal bar seam air water separator 9, muddy water mixed solution enters into clarification recirculating zone 10 and carries out mud, water natural separation, clarification recirculating zone 10 does not allow bubble to bring into current, in order to avoid affect clarification and effluent water quality.Supernatant liquid overflows through one-level water leg 12; The face formula air lift microkinetic return channel 13 that middle level clarification active sludge is installed through level is back to aeration zone 7 and oxygen-starved area 4 from top, be again that iterative cycles like this obtains high concentration particle active sludge; The active poor mud of bottom is discharged by excess sludge pipe 14, realizes the object that biological phosphate-eliminating mud and aging mud are got rid of from system.
5, inclined tube /Ban settling region 17: enter the inclined tube /Ban settling region 17 of the second stage through the clear liquor of first step nature clarifying treatment, carry out chemical dephosphorization and co-coagulation precipitation process by 15 dosings of medicament spray equipment.In L-type waterpower, mixed under the hydraulic action of spigot 16, then there is sufficient contact flocculation reaction and precipitate in suspended sludge layer 18 slow circumvolves, in the inclined tube in remaining fine particle pollutent Jiang middle layer/plate precipitation assembly 19, further precipitation is removed, and the clear water after precipitation overflows from secondary water leg 20.The mud of suspended sludge layer 18 bottom depositions is got back to biochemical treatment system by reflux sludge tube 21 by the lifting of inlet water lifting pumps room and is processed.Impact for fear of algae on inclined tube, inclined tube /Ban settling region Chi Ding arranges tinted shade 22.
6, sterilization exhalant region: the clear water overflowing from secondary water leg 20, adds pipe 24 through sterilizing agent and add sterilizing agent, and after continuous contact sterilizing half an hour, discharge finally by water outlet open-channel meter 25 on-line monitorings with after measuring in contact sterilizing canal 23.
In the present embodiment, it is 2000m that this Small Town Wastewater is processed total amount
3/ d, except the Z-type stripping reflux two-stage precipitation integral treatment tank of 1 main body, also supportingly have 1 underground type inlet water lifting pumps room, (the quiet gas blower of water-circulation type, sludge dewatering equipment, chemicals feeder etc.) and 1 room for integrated management (one-storey house, office on duty, storehouse, distribution etc.) between 1 ground type integrated equipment.The integrated pond floor space 299m of this main body
2, by each 1000m of 2 lattice
3the integrated pond of/d is also allied the communists wall and is built, the lattice of being convenient to not stop production maintenance.Fig. 3 is single lattice 1000m
3the floor map of the Z-type stripping reflux two-stage precipitation integral treatment tank of/d.
The main technical details of this Z-type stripping reflux two-stage precipitation integral treatment tank is as follows:
1. grid, adopts rotary type tooth harrow grid maker, pitch 3mm, 75 ° of setting angles;
2. sand setting canal, hydraulic detention time 2.5 min, horizontal flow velocity 0.03m/s, little bucket gravity sediment outflow;
3. biochemical reaction zone, total hrt HRT=5 h; Available depth H
water=4.3m;
Mixed solution MLSS concentration: X=6.0g/L, nitrification liquid internal reflux rate 100%～300%;
Sludge loading: Ls=0.08 kgBOD
5/ kgMLSSd, sludge age 20d;
Maximum air demand 5.56 m of gas blower
3/ min, gas-water ratio (contains stripped backflow gas): 4: 1;
4. clarify recirculating zone, the clarification residence time 1.3 h, available depth 3.0m;
Active sludge air lift internal reflux rate 33%～100%, clarification activated sludge concentration 24～12g/L;
Bottom, settling section excess sludge water ratio: 96%～98 %;
5. tube settling district, inclined tube surface load 1.5 m
3/ m
2h;
Sedimentation time 4.22 h, available depth 3.20m, effluent weir flow rate < 1.2 L/sm;
The special-purpose inclined tube filler of sewage Φ=80mm, L=1m, H=877mm, 60 °, inclination angle, single lattice 27.8m
2;
Compound diatomite modified water treatment agent dosage: 25mg/L;
Tube settling district does not establish scraping and sucking machine, bucket gravity spoil disposal;
6. contact sterilizing canal, duration of contact 30min, available depth 3.60m;
Chlorine tablets or chlorinated lime dosage 5～15mg/L, by season, epidemic situation and the requirement operation of epidemic prevention department;
Sterilizing agent and water treatment agent throwing device are arranged between integrated equipment.
Table 1 Z-type stripping reflux two-stage precipitation integral treatment tank water-in and water-out water quality table
| Project | COD | BOD 5 | SS | TN | NH 3-N | TP |
| Influent quality (mg/L) | 320 | 140 | 230 | 40 | 35 | 4 |
| Effluent quality (mg/L) | ≤60 | ≤20 | ≤20 | ≤20 | ≤8(15) | ≤1.0 |
| Processing efficiency (%) | ≥81.3 | ≥85.7 | ≥91.3 | ≥50 | ≥77.1(57.1) | ≥75 |
Staffing 2 people of this Small Town Wastewater treatment plant, process every m
3the power consumption of sewage and medicine consumption priming cost add up to 0.22 yuan, and wherein the engineering direct investment of this Z-type stripping reflux two-stage precipitation integral treatment tank is 222.16 ten thousand yuan.Compare with the Sewage Treatment Project of other activated sludge process denitrification dephosphorization technique technology, the content of dispatching from the factory to sterilization from grid sand setting from comparable content, the utility model can be saved the direct construction investment about 30% of this part project content, the direct operating costs such as power consumption and medicine consumption can be saved 20% left and right, thereby technical economic benefit of the present utility model is very significant.
From above-described embodiment, can find out, the utility model Z-type stripping reflux two-stage precipitation integral treatment tank is particularly suitable for China's vast small towns sewage disposal " three low one is few's " requirement, it is low to be that the utility model meets construction investment, running cost is low, operational administrative requires low, the general requirement that excess sludge discharge is few.
Embodiment bis-
Certain small city development area is infant industry concentration zones, need one of planning construction to take mixed industrial waste water as the main garden sewage work containing sanitary sewage, through water quality test, think and be applicable to adopting biochemical treatment and be aided with the sewage treatment process that materialization is processed, effluent quality requires to reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level A standard, select Z-type stripping reflux two-stage precipitation integral treatment tank of the present utility model, as sewage disposal main body structures, obtain good result.This garden planning sewage disposal total amount is 10000m
3/ d, minute two phases build, and first phase is first built 5000m
3/ d scale, i.e. 1 5000m
3outside the Z-type stripping reflux two-stage precipitation integral treatment tank of/d, supporting equalizing tank and the lift pump room that has 1 underground type band water quality emergency function and acidication function also, (Root's blower, sludge dewatering equipment, chemicals feeder etc.) and 1 room for integrated management (one-storey house, office on duty, chemical examination, maintenance, storehouse, distribution etc.) between 1 ground type integrated equipment.The integrated pond floor space 916m of this main body
2, by each 2500m of 2 lattice
3the integrated pond of/d is also allied the communists wall and is built, the lattice of being convenient to not stop production maintenance.The main technical details of this Z-type stripping reflux two-stage precipitation integral treatment tank is as follows:
1. grid, adopts rotary type stainless steel tooth harrow grid maker, pitch 3mm, 75 ° of setting angles;
2. sand setting canal, hydraulic detention time 3 min, horizontal flow velocity 0.025m/s, little bucket gravity sediment outflow;
3. biochemical reaction zone, total hrt HRT=7 h; Available depth H
water=5.0m;
Mixed solution MLSS concentration: X=6.0g/L, nitrification liquid internal reflux rate 100%～300%;
Sludge loading: Ls=0.065 kgBOD
5/ kgMLSSd, sludge age 20d;
Maximum air demand 13.2 m of gas blower
3/ min, gas-water ratio (contains stripped backflow gas): 3.8: 1;
4. clarify recirculating zone, the clarification residence time 1.5 h, available depth 3.70m;
Active sludge air lift internal reflux rate 33%～100%, clarification activated sludge concentration 24～12g/L;
Bottom, settling section excess sludge water ratio: 96%～98%;
5. tube settling district, inclined tube surface load 1.44 m
3/ m
2h;
Sedimentation time 4.5 h, available depth 3.80m, effluent weir flow rate < 1.2 L/sm;
The special-purpose inclined tube filler of sewage Φ=80mm, L=1m, H=877mm, 60 °, inclination angle, single lattice 72.4m
2;
Compound diatomite modified water treatment agent dosage: 45mg/L;
Tube settling district does not establish scraping and sucking machine, bucket gravity spoil disposal;
6. contact sterilizing canal, duration of contact 30min, available depth 4.20m;
Dioxide peroxide dosage 5～12mg/L, by season, epidemic situation and the requirement operation of epidemic prevention department;
Chlorine dioxide generator and water treatment agent throwing device are arranged between integrated equipment.
Table 2 garden Z-type air lift precipitation integral treatment tank water-in and water-out water quality table
| Project | COD | BOD 5 | SS | TN | NH 3-N | TP |
| Influent quality (mg/L) | 350 | 120 | 200 | 30 | 25 | 3.5 |
| Effluent quality (mg/L) | ≤50 | ≤10 | ≤10 | ≤15 | ≤5(8) | ≤0.5 |
| Processing efficiency (%) | ≥85.7 | ≥91.7 | ≥95 | ≥50 | ≥80(68) | ≥85.7 |
Staffing 4 people of this garden sewage work, process every m
3the power consumption of sewage and medicine consumption priming cost add up to 0.28 yuan, and wherein the engineering direct investment of this Z-type stripping reflux two-stage precipitation integral treatment tank is 425.57 ten thousand yuan.Compare with the Sewage Treatment Project of other activated sludge process denitrification dephosphorization technique technology, the content of dispatching from the factory to sterilization from grid sand setting from comparable content, the utility model can be saved the direct construction investment about 35% of this part project content, the direct operating costs such as power consumption and medicine consumption can be saved 25% left and right, thereby technical economic benefit of the present utility model and environmental benefit are very significant.
As can be seen from the above embodiments, the utility model Z-type stripping reflux two-stage precipitation integral treatment tank, not only can process town domestic sewage, and can process the combined sewage that industrial park can be biochemical, not only can reach " urban wastewater treatment firm pollutant emission standard " (GB18918-2002) one-level B standard, and be easy to through one-level A standard and existing short flow process without prolongation, only need when design or operation, adjust parameter, first guarantee that biological reaction tank TN index reaches one-level A requirement, without setting up in addition advanced treatment structures; Then in total phosphorus (TP) and suspended substance (SS) index, choose appropriate parameter and adjust added amount of chemical, can reach easily one-level A standard.Therefore, the utility model is compared with advanced treatment process with conventional activated sludge process denitrification dephosphorization technique, obviously has the advantages such as construction investment is few, floor space is little, energy consumption is low, economic operating cost, total cost is low, operational administrative is easy.
Engineering reliability of the present utility model and originality mainly embody a concentrated reflection of following San Ge aspect:
First, at utility application " a kind of sewage biochemical treatment integrated apparatus, system and processing method " (publication number CN 102923908A, an open day 2013.2.13) before aeration zone " stretching " hew out Yi Ge space, as the preposition oxygen-starved area in integrated pond, from aeration aerobic zone with bubble upwelling mode stripping reflux the nitrification liquid to preposition oxygen-starved area, under anaerobic environment, by the denitrifying bacteria utilization in high concentration particle active sludge, just entered the contained organic carbon source of sewage in pond and carried out denitrification denitrogenation biochemical reaction, realize sufficient biological denitrificaion and biochemical oxygen demand (BOD) (BOD), chemical oxygen demand (COD) (COD) pollutent Partial digestion, obtain further strengthened denitrification effect.
Second, the half longitudinal rectangular space of V-arrangement that the Z-shaped partition wall partition wall vertical with aeration zone of utilization original creation surrounds is as clarification recirculating zone and sludge discharging area, bottom, top position, middle part, Gai district creatively proposes the face formula air lift microkinetic return channel of installation level first, the active sludge of clarified separation is refluxed without omitting in the horizontal direction comprehensively, can either solve the comparatively large capacity settling pond clarification sludge reflux inhomogeneous variety of issue bringing not in time, can not destroy the flco structure and activity of active sludge again, because do not exist conventional sludge reflux pump quick runner " to smash " problem of flco, and quantity of reflux size is that return sludge ratio can pass through adjusting range formula air lift microkinetic return channel air demand size and rapid and simple control, coordinate the backflow utilization of excess sludge discharge control and follow-up compound diatom local medicine agent mud, through stripping reflux circulation repeatedly, realize bio-reaction zone sludge concentration controlled within the scope of 3～9 g/L, Zhe aeration zone adopts compared with low dissolved axygen and controls under the running status of aeration, utilize granule sludge to realize sufficient nitration reaction and anti-nitration reaction, thereby reach the object of efficient denitrification.
It is whole that recirculating zone and Shi Yige space, sludge discharging area, bottom are clarified in the above-mentioned half longitudinal rectangular space of V-arrangement, is that the utility model is at a professional innovative point, not only simply but also practical.Compare water conservancy diversion inclined-plane in utility model patent " double-face flow-guiding sewage treatment pool of forced refluence " (application number ZL200610125119.7), and utility application " a kind of sewage biochemical treatment integrated apparatus, system and processing method " (publication number CN 102923908A, open day 2013.2.13) oblique diaphragm in, on it, the mud of deposition is in gravity landing process, below slit place all can there is ascending current jacking and glide not smooth, easily cause the mud problem such as corruption floating etc. that loses activity, and the utility model adopts Z-shaped bottom bucket structure first, coordinate the water inlet of lateral vertical partition wall certain altitude, fundamentally solved jacking problem, thereby in the above-mentioned half longitudinal rectangular space of V-arrangement Z-shaped bottom bucket to compare with similar integrated pond be another innovative point and the practical point in engineering application.
The 3rd, utilize two-stage depositing technology in same pond to realize the high collaborative removal that ensures dephosphorization and other amounts of residual contamination of sewage after biochemical treatment.Clarification recirculating zone in the first step, muddy water mixed solution Gai district after biochemical treatment relies on action of gravity to realize mud-water separation for the first time completely, and the inclined tube /Ban settling region that separated rear clear liquor enters the second stage through one-level water leg carries out dosing chemical dephosphorization and co-coagulation precipitation process.At inclined tube /Ban settling region lower floor the utility model, be creatively provided with again L-type waterpower and mixed spigot, in L-type waterpower, mix spigot upper entrance place and added medicament, at hydraulic action low suspension sludge blanket slow circumvolve, then there is sufficient contact flocculation reaction and precipitate, in the inclined tube/plate in remaining fine particle pollutent Ze middle layer, further precipitation is removed, thereby realizes total phosphorus (TP) and all other water-quality guideline as suspended substance (SS), five-day BOD (BOD
5), the object of the stably reaching standard such as chemical oxygen demand (COD) (COD).
Of the present utility modelly focus on two places innovations and utilized air lift principle: the 1st, the face formula air lift microkinetic return channel that level completely spreads installation is back to biochemical reaction zone by clarifying active sludge in clarification recirculating zone continuously, comprehensively equably; The 2nd, at the bottom of the nitrification liquid ， pond that in aeration zone, biochemical reaction produces, the gas stripping Xia，Cong upper strata liquid level automatic back flow of blast aerator bubble upwelling carries out denitrification denitrogenation reaction to preposition oxygen-starved area.The former makes system obtain high concentration particle active sludge, significantly improves system treatment rate and nitric efficiency, and the electronic reflux pump of stripping reflux energy loss-rate is energy-conservation obviously, and does not destroy granule sludge flco structure; The latter simplifies and has saved nitrated mixed solution internal reflux pump, by the air lift buoyancy of blast aeration itself, does not need extra backflow energy consumption.
Another one of the present utility model focuses on the ingenious two-stage precipitation principle of having utilized: the Z-shaped partition wall that two-stage precipitation is created by the utility model separates, the mud-water separation of the first step does not consume energy, not dosing, efficiency is high, reach more than 97%, stripping reflux is not affected by the restraining effect of medicament to the active sludge of biochemical zone: the precipitation of the second stage is only the clear liquor of suspended substance (SS) concentration below 100 mg/L to be carried out to dosing, thereby added amount of chemical is little, medicine consumption cost is low, the chemical sludge amount producing is little, does not increase follow-up sludge treatment difficulty.After two-stage precipitation process, effluent quality is more secure, only needs by adjusting added amount of chemical and pharmacy variety, just can guarantee efficiently collaborative removal of efficient dephosphorization and other amounts of residual contamination, ensures that final water conditioning is up to standard.
Claims (4)
1.Z type stripping reflux two-stage precipitation integral treatment tank, comprise rectangle form pool body (1), pond body be divided in (1) ⑷, aeration zone, oxygen-starved area (7), clarification recirculating zone (10), inclined tube /Ban settling region (17) with contact sterilizing canal (23), it is characterized in that: in aeration zone (7) and the vertical partition wall middle part lower position of clarification recirculating zone between be (10) provided with horizontal bar seam air water separator (9); In clarification recirculating zone (10) and inclined tube /Ban settling region be provided with Z-shaped partition wall (11) between (17); Clarification recirculating zone (10) in the middle part of top position be provided with face formula air lift microkinetic return channel that level completely spreads installation (13); In inclined tube /Ban settling region, (17) lower floor is provided with L-type waterpower and has mixed spigot (16).
2. Z-type stripping reflux two-stage precipitation integral treatment tank as claimed in claim 1, it is characterized in that: described horizontal bar seam air water separator (9), comprise rising flow guiding inclined plate (901), vertical stabilier (902), horizontal fixed base plate (903), the heavy mud plate (904) of oblique water conservancy diversion and deep floor (905), described horizontal fixed base plate (903) is connected with the bottom of rising flow guiding inclined plate (901), and rising flow guiding inclined plate (901) top is connected with vertical stabilier (902) bottom; The heavy mud plate (904) of oblique water conservancy diversion one end is connected with rising flow guiding inclined plate (901), and the other end is connected with horizontal fixed base plate (903).
3. Z-type stripping reflux two-stage precipitation integral treatment tank as claimed in claim 1, it is characterized in that: (13) described formula air lift microkinetic return channel, comprise suction pipe (1302), the airtight casing of surrounding (1303), air nozzle (1304), standpipe elbow (1305), backflow inclined tube (1306), backflow wall pipe (1307) and the pond external compression air control unit (1308) of inlet pipe (1301), termination sealing; The suction pipe (1302) of described termination sealing is and on the suction pipe (1302) that suction pipe (1302) that UNICOM in length and breadth arranges the sealing of ，Ge termination is positioned at the sealing of same level ，Ge termination, is uniformly distributed a plurality of mud apertures (1309) that enter; The whole medium position of the suction pipe (1302) sealing in termination is provided with the airtight casing of surrounding (1303), in the airtight casing of surrounding (1303), establish the single or multiple air nozzles (1304) that are connected with inlet pipe (1301), the airtight casing of surrounding (1303) top is connected with one end of standpipe elbow (1305); The other end of described standpipe elbow (1305) is connected with backflow inclined tube (1306) and backflow wall pipe (1307) successively, at the bottom of the outlet pipe of described backflow wall pipe (1307) a little less than the water surface or and water surface hold the line; Described pond external compression air control unit (1308) and inlet pipe (1301) are connected.
4. Z-type stripping reflux two-stage precipitation integral treatment tank as claimed in claim 1, it is characterized in that: (16) described L-type waterpower mixed spigot, comprise water-in standpipe (1601), diversion box (1602) and attached wall inclined tube (1604), described water-in standpipe (1601) water inlet respectively with two attached wall inclined tubes (1604) after diversion box (1602) shunting are connected, two attached wall inclined tubes (1604) are connected respectively and with two L shaped bend pipes (1606) of reducing nozzle (1607), and described two L shaped bend pipes (1606) are asymmetric arrangement.
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|---|---|---|---|
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| CN201320502499.7U CN203392987U (en) | 2013-08-18 | 2013-08-18 | Z-type integrated sewage treatment pond employing gas stripping reflux and two-stage precipitation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395948A (en) * | 2013-08-18 | 2013-11-20 | 武汉宝捷能环境工程技术有限公司 | Z-shaped gas stripping reflux two-stage precipitation integrated sewage treatment tank |
| CN110713258A (en) * | 2019-10-31 | 2020-01-21 | 湖北加德科技股份有限公司 | Full-mixing type kernel denitrification sewage treatment system and process |
| WO2022233331A1 (en) * | 2021-05-07 | 2022-11-10 | 艾柯环保技术(杭州)有限公司 | Method and system for promoting two-stage sedimentation of aerobic granular sludge in continuous flow |
-
2013
- 2013-08-18 CN CN201320502499.7U patent/CN203392987U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103395948A (en) * | 2013-08-18 | 2013-11-20 | 武汉宝捷能环境工程技术有限公司 | Z-shaped gas stripping reflux two-stage precipitation integrated sewage treatment tank |
| CN110713258A (en) * | 2019-10-31 | 2020-01-21 | 湖北加德科技股份有限公司 | Full-mixing type kernel denitrification sewage treatment system and process |
| WO2022233331A1 (en) * | 2021-05-07 | 2022-11-10 | 艾柯环保技术(杭州)有限公司 | Method and system for promoting two-stage sedimentation of aerobic granular sludge in continuous flow |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140115 Termination date: 20150818 |
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| EXPY | Termination of patent right or utility model |