CN1544364A - Propulsive and batched type activated sludge reaction process and device - Google Patents
Propulsive and batched type activated sludge reaction process and device Download PDFInfo
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- CN1544364A CN1544364A CNA2003101113935A CN200310111393A CN1544364A CN 1544364 A CN1544364 A CN 1544364A CN A2003101113935 A CNA2003101113935 A CN A2003101113935A CN 200310111393 A CN200310111393 A CN 200310111393A CN 1544364 A CN1544364 A CN 1544364A
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- 239000010802 sludge Substances 0.000 title claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 12
- 230000001141 propulsive effect Effects 0.000 title description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 45
- 238000005273 aeration Methods 0.000 claims abstract description 30
- 238000012163 sequencing technique Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 44
- 230000008569 process Effects 0.000 claims description 44
- 238000001556 precipitation Methods 0.000 claims description 9
- 230000008859 change Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 claims description 4
- 238000004148 unit process Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000007306 turnover Effects 0.000 claims description 2
- 239000010865 sewage Substances 0.000 abstract description 25
- 238000004062 sedimentation Methods 0.000 abstract description 5
- 238000006065 biodegradation reaction Methods 0.000 abstract 1
- 230000009189 diving Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 15
- 239000011259 mixed solution Substances 0.000 description 10
- 238000010992 reflux Methods 0.000 description 10
- 230000007704 transition Effects 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 5
- 229910052698 phosphorus Inorganic materials 0.000 description 5
- 239000011574 phosphorus Substances 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 4
- 238000006731 degradation reaction Methods 0.000 description 4
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 241000894006 Bacteria Species 0.000 description 2
- 229920000388 Polyphosphate Polymers 0.000 description 2
- 229920000037 Polyproline Polymers 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- 238000013404 process transfer Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 241001347978 Major minor Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005352 clarification Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 239000006228 supernatant Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000003403 water pollutant Substances 0.000 description 1
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Abstract
An propelled sequencing batch type active sludge reaction process and apparatus for sewage biodegradation by using active sludge, wherein the apparatus comprises six rectangular pools, each of which are interconnected for sharing a common wall, wall plate valves and overflowing connection holes are arranged between the pools, the six pools are provided with aeration heads, the anaerobic pool is provided with a diving propeller and a water intake, the aeration sedimentation pool is provided with a water supply tank, a water outlet tank and a surplus sludge pump. The reaction process comprises two main steps and one transitional step.
Description
It serves as that the basis develops sewage treatment process and the device that produces with classical active sludge biological degraded theory that technical field the present invention relates to a kind of employing.
Background technology is present, and is no matter international and domestic in municipal effluent and trade effluent engineering construction, and the sewage treatment process that is produced by classical active sludge biological degraded Theory Changing is adopted in the engineering design more than 90 percent.In these technologies, effluent quality is good relatively, construction investment relatively economical, working cost are lower.Be that people are in practice than traditional A that has commonly used
2/ O, modified form SBR and improved oxidation ditch technology.In modified form SBR technology, the treatment technology that people relatively generally acknowledge is comparatively advanced, stable effluent quality is good, the construction investment comprehensive economic index is good surely belongs to UNITANK and two kinds of technologies of MSBR.
In the UNITANK of standard technology, the entire treatment system is made up of three continuous rectangle ponds 19,20,21, left, center, right (device).Suppose sewage earlier from rectangle form pool 19 water inlets, pond 20 and right pond 21 in entering in turn communicating pipe, water outlet is discharged by pond, right side 21 through fixed weir; At this moment, Zuo Chi, the equal aeration in middle pond, and right pond precipitation.After certain period (aeration, precipitation), close 19 water inlets of pond, left side, pond 20 water inlets in the unlatching, at this moment, the pond, left side stops aeration, and sewage flows to pond, right side 21 by middle pond, after an of short duration transition, close intermediate pool 4 gates of intaking, and change 21 water inlets into, at this moment from the pond, right side, pond, right side aeration, left side pond water outlet behind quiescent setting, the current right-to-left flows, thereby finishes a switching cycle.Like this, go round and begin again, the sewage that continuously flows into is rotated aeration, the continuous blow-down of degraded post precipitation in three ponds through the left, center, right.Its general flow chart such as Fig. 3:
In this technology, because water inlet is with periodic transformation, except that middle pond always the aeration, pond, the left and right sides is aeration, precipitation respectively, thereby does not need mud to reflux.But its greatest drawback be exactly upper and lower periodic transformation whole story owing to the flow direction conversion is difficult to guarantee the stable of effluent quality, defective water need reflux and handle, causes the portion of energy waste.In addition, because the existence of non-anaerobic segment, biological phosphate-eliminating is difficult to up to standard.
Compare with UNITANK, the fixing water inlet of MSBR technology changes water outlet; Simultaneously, except that two SBR ponds order aeration, sedimentation and drawing, all the other each pond functions are fixed.Fig. 4 is this system flow sketch, and with reference to accompanying drawing, its operation logic is:
Sewage at first enters anaerobic pond 25, and the polyP bacteria in the returnedactivatedsludge is fully put phosphorus at this, and mixed solution enters anoxic pond 26 and carries out denitrification then; Sewage behind the denitrification enters Aerobic Pond 27, and organism is by aerobic degradation, and active sludge enters precipitating SBR pond (22 or 28) after fully inhaling phosphorus again, clarification back sewage discharge; This moment, denitrification, nitrated was carried out in the SBR pond (28 or 22) of the other side under the condition of 1.5Q quantity of reflux, or left standstill preliminary precipitation; Returned sluge WN at first enters concentration basin 23 and concentrates, supernatant liquor SY directly enters Aerobic Pond 27, thickened sludge LW then enters anoxic pond 24, like this, can carry out denitrification on the one hand, can consume dissolved oxygen and nitrate in the backflow thickened sludge on the other hand earlier, put phosphorus for the anaerobism of carrying out subsequently more advantageous conditions is provided.The quantity of reflux that 1.5Q is arranged between Aerobic Pond and anoxic pond is so that carry out sufficient denitrification.Therefore, MSBR technology is the highest technology of present biological dephosphorize denitrification intensification degree, and its biological degradation efficient and effluent quality are superior in the current activated sludge process.But its maximum defective is: the huge quantity of reflux in many places not only causes refluxing unit more, and the backflow power charge is higher.29 expression air weirs among the figure.
How to utilize intensification degree height in two kinds of technologies of UNITANK, MSBR, take up an area of and economize, need not (or few part) backflow, the advantage that effluent quality is good, avoiding its deficiency is problem extremely to be solved.
Summary of the invention the objective of the invention is at above-mentioned present situation, aims to provide the advantage in two kinds of technologies of a kind of energy product UNITANK, MSBR, avoids its insufficient propelling sequencing batch activated sludge reaction process and device.
The implementation of the object of the invention is that propelling sequencing batch activated sludge reaction process shows following three aspects:
1) on plane space, although adopt multipoint water feeding and multiple spot water outlet, per stage, element number was consistent with unit process function order from the unit composition of intaking between water outlet,
2) in the operation sequential, along with the turnover water spot alternately changes, each component units is under the sequence controller effect in the process system, and Elementary Function is corresponding to change: anaerobism, anoxic, aerobic or precipitation, aerobic,
3) in the whole service process, in the process system between each unit and in each unit effluent stream to not changing, drainage flow is pushed ahead in proper order, simultaneously, water body is pushed ahead in the process in proper order in process system, by the short stream or the short stream of part of individual elements, change the sludge back flow quantity of this functional unit.
Advance the sequence batch (device, be made up of six rectangle form pools, each pond is connected with each other shared pool wall, and both sides are Da Chi 13,16, and the centre is four Xiao Chi 14,15,17,18, is provided with wallboard valve 2 and overcurrent between the pond and is communicated with hole 7.Wherein one big two little pond holds 13,14,15 and organizes one big two little pond appearance 16,17,18 correspondent equals with another.Da Chi is provided with effluent trough 3, distributing trough 8, residual sludge pump 9 and excess sludge discharge pipe 12 and water outlet 1.Six ponds are equipped with aeration head 10, and anaerobic pond 14,17 is provided with underwater scooter 5 and water-in 4.
Bear different functions according to different array modes during operation.The calculating of Chi Rong will according to Inlet and outlet water water quality and when operation each pond functional requirement determine, but, should follow the least favorable principle during calculating and determine that the Dan Chi pond holds because the different periods of the function in every pond in a complete cycle change order.
The present invention has following characteristics:
1, apparatus structure compactness adopts rectangle form pool type, each pond to be connected with each other shared pool wall, and the structural arrangement compactness reduces and takes up an area of and concrete amount, compares with traditional circular pond, and rectangle form pool can shared pool wall, has reduced concrete amount in large quantities;
2, no mud refluxes, unit process Chi Chi holds big, adopt multipoint water feeding, the multiple spot water outlet, the mixed solution circulation advances flows, not only having solved sewage refluxes because of the mud that dephosphorization denitrogenation requires, need not to reflux and scrape (row) mud equipment, reduced the working cost of sewage treatment process to greatest extent, construction investment is economized, working cost is low, and in the whole process, system's current are unidirectional push type and flow, improved the efficient of each reaction member to greatest extent, with pond, both sides contrast in the UNITANK system, its main aeration/precipitation unit pond holds efficient and improves 40%, thereby has strengthened the biological tank degraded, solid-liquid separation effect;
3, adopt constant water outlet, avoided classical SBR to cause higher head loss, reduced to keeping working cost than high water head took place owing to becoming the water level water outlet;
4, on space and plane, design tangible anaerobism, anoxic and aerobic/precipitation function division, satisfied the requirement of saprobia dephosphorization denitrogenation preferably, guaranteed effluent quality; Simultaneously, at traditional A
2Increase anoxic, aerobic functional zone on the/O technology again, it is abundant to have satisfied dephosphorization denitrogenation to greatest extent, and effluent quality is good;
5, during transition, adopt the operational mode of the static aeration and sedimentation of nature, can will go up the sewage that just entered of a flow process end degrade apace, mixed solution can be settlement separate quickly up to standard, thereby the sewage that enters after avoiding in the semi-period switching process is because of the short phenomenon that can not be up to standard of degraded, sedimentation time, improve mixed solution biological degradation and solid-liquid separation efficiency, guaranteed that total system water outlet whole process is up to standard;
6, adopt multipoint water feeding, multiple spot water outlet, parallel flow advances, the sewage that each time enters, and its current route does not shorten because of the variation of flow process, mixed solution flow process circuit is not influenced by the cycle sequential, thereby has avoided owing to the flow process conversion causes the current short circuit to influence water outlet phenomenon up to standard;
7, processing unit is simple, running maintenance is convenient
Adopt the pusher operation of circulation, sequencing control, can carry out different control working time to different function units according to Inlet and outlet water water quality, dissimilar influent qualities there is adaptability preferably, operation is simultaneously regulated flexibly, in addition, owing to do not need to scrape mechanical means such as mud, mud backflow, operate more succinctly, safeguard and more to become convenient;
8, because integrated compact Layout does not have the mud of scraping equipment simultaneously, whole biological tank is easy to cover fully or be built in underground, realizes no waste gas and noise emissions, reaches zero-pollution goal.
Description of drawings
Fig. 1 device two dimensional structure synoptic diagram
Fig. 2 a, b, c reaction process schema of the present invention
Fig. 3 a, b, cUNITANK process flow sheet
Fig. 4 MSBR process flow sheet
Embodiment
With reference to Fig. 1, this device is made up of six rectangle form pools, and each pond is connected with each other shared pool wall, and both sides are Da Chi 13,16, and the centre is four Xiao Chi 14,15,17,18, is provided with wallboard valve 2 and overcurrent between the pond and is communicated with hole 7.Wherein one big two little pond holds 13,14,15 and organizes one big two little pond appearance 16,17,18 correspondent equals with another.Da Chi is provided with effluent trough 3, distributing trough 8, residual sludge pump 9 and excess sludge discharge pipe 12 and water outlet 1.Six ponds are equipped with aeration head 10, and anaerobic pond 14,17 is provided with underwater scooter 5 and water-in 4.
Bear different functions according to different array modes during operation.The calculating of Chi Rong will according to Inlet and outlet water water quality and when operation each pond functional requirement determine, but, should follow the least favorable principle during calculating and determine that the Dan Chi pond holds because the different periods of the function in every pond in a complete cycle change order.Because the needs of function, six ponds are equipped with aeration head 10, all have aeration performance, anaerobic pond to be provided with underwater scooter 5, and settling tank is provided with the part mud refluxing units such as emptying pump 9 of discharging excess sludge 12.
Illustrate technology of the present invention below.Reaction process comprises two main process and an of short duration transition flow process.In two main process, to observe with the flow direction of mixed solution, the water inlet of back one flow process is advanced to the latter end of a flow process flow process, i.e. anaerobism or anoxic section, the leading portion of a last flow process flow process then becomes the back segment of this flow process flow process, and mixed solution circulates propelling and so forth.Detailed process is following sees Fig. 2:
With reference to Fig. 2 a, anaerobic pond 14 in the middle of sewage at first enters, because of this pond has accumulated a large amount of active sludge with anoxic denitrification function in a last main body operational scheme as anoxic pond, under this anaerobic condition, polyP bacteria is released phosphorus fully, mixed solution enters anoxic pond 15 and carries out denitrification then, enter Da Chi 16 through the sewage behind the denitrification and carry out main aeration, organism in the sewage is by aerobic degradation, nitride is by nitrated release, thereby active sludge suction phosphorus makes sewage realize dephosphorization denitrogenation.Thereafter sewage enters anoxic pond 17 again, this moment, the total nitrogen load of denitrifying activated sludge was very low, thereby can be degraded to itrated compound to the sufficient inadequately nitride of front denitrification to greatest extent, enter auxilliary solarization air cell 18 aerations again, thorough nitrated one-tenth nitrogen in the pond and being removed, remaining organism also farthest is degraded into inorganics because mud load rate is extremely low, after this enters Da Chi 13 precipitations, is degraded into water pollutant precipitated removal owing to good settling property of inorganics.Effluent quality is good.
Switching process is seen 2b, sewage water inlet enters the anoxic pond 17 that changes into from two major-minor aeration tanks from the anaerobic pond 14 of a last flow process and enters, anoxic pond stopped aeration and progressed into anaerobism this moment, and the auxiliary aeration tank 18 of a last flow process is constant with settling tank 13 functions, continue aeration, precipitated outlet water, keeping the balance of whole mixed solution flow process, and the sewage that has just entered this flow process anaerobic pond 17 is also because fluidised form propulsive formation in proper order in the whole pond, can not flow to settling tank and influences effluent quality.Anaerobism in the last flow process, anoxic pond 14,15 then all become static aeration, with the sewage that just entered of the last flow process end of degraded to greatest extent, and the transition flow process that switch in water inlet the main aeration tank 16 of a last flow process transfers quiescent setting to, thinks that next flow process transfers precipitated outlet water to and prepares.
After the transition time period, the main aeration tank in the last flow process is through the quiescent setting certain hour with reference to Fig. 2 c, and water outlet reaches emission request.At this moment, stop the water outlet of transition flow process settling tank 13, open the communicating valve of transition period stationary part and make mixed solution under the effect of hydraulic pressure through transitional aeration, settling tank, water outlet is up to standard after sedimentation.At this moment, the former transitional pond 13 that is settled out becomes main aeration Aerobic Pond.Sewage advances from anaerobic pond 17, successively through anoxic pond 18, main aeration tank 13, anoxic pond 14, auxiliary aeration 15, settling tank 16 water outlets, repeats after finishing a complete cycle of operation again.In two main body operational schemees, treat effluent is discharged by overflow weir, and sedimentary excess sludge is by residual sludge pump or rely on the static pressure discharging.Thereby the circulation of the integral body of sewage and mud, balance are guaranteed carrying out smoothly of entire sewage treatment scheme in the maintenance total system.
Claims (2)
1, advance the sequencing batch activated sludge reaction process, it is characterized in that showing following three aspects:
1) on plane space, although adopt multipoint water feeding and multiple spot water outlet, per stage, element number was consistent with unit process function order from the unit composition of intaking between water outlet,
2) in the operation sequential, along with the turnover water spot alternately changes, each component units is under the sequence controller effect in the process system, and Elementary Function is corresponding to change: anaerobism, anoxic, aerobic or precipitation, aerobic,
3) in the whole service process, in the process system between each unit and in each unit effluent stream to not changing, drainage flow is pushed ahead in proper order, simultaneously, water body is pushed ahead in the process in proper order in process system, by the short stream or the short stream of part of individual elements, change the sludge back flow quantity of this functional unit.
2, advance the sequencing batch activated sludge device, it is characterized in that forming by six rectangle form pools, each pond is connected with each other shared pool wall, both sides are Da Chi (13), (16), the centre is four Xiao Chi (14), (15), (17), (18), be provided with wallboard valve (2) and overcurrent between the pond and be communicated with hole (7), wherein one big two little pond holds (13), (14), (15) organize one big two little pond appearance (16) with another, (17), (18) correspondent equal, Da Chi is provided with effluent trough (3), distributing trough (8), residual sludge pump (9) and excess sludge discharge pipe (12) and water outlet (1), six ponds are equipped with aeration head (10), anaerobic pond (14), (17) be provided with underwater scooter (5) and water-in (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CNA2003101113935A CN1544364A (en) | 2003-11-17 | 2003-11-17 | Propulsive and batched type activated sludge reaction process and device |
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| CNA2003101113935A CN1544364A (en) | 2003-11-17 | 2003-11-17 | Propulsive and batched type activated sludge reaction process and device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369830C (en) * | 2006-03-09 | 2008-02-20 | 武汉凯迪水务有限公司 | Waste water treating process of circulation sequence batched active sludge and its active sludge reactor |
| CN100418908C (en) * | 2006-10-30 | 2008-09-17 | 江明辉 | Sewage deep treatment method and device without sludge discharge |
| CN100503482C (en) * | 2004-12-31 | 2009-06-24 | 可事托环保设备（上海）有限公司 | A new sewage treatment method |
| CN1686862B (en) * | 2005-03-29 | 2011-08-31 | 上海市政工程设计研究院 | Improved type alternated technique for wastewater treatment of activated sludge process and equipment |
| CN102259981A (en) * | 2011-07-08 | 2011-11-30 | 中国矿业大学 | Sequencing batch biological phosphorus and nitrogen removal process |
| CN102531270A (en) * | 2010-12-28 | 2012-07-04 | 中国市政工程西北设计研究院有限公司 | Multi-section multi-step anaerobic-oxic (AO) biological reaction tank |
| CN107973398A (en) * | 2017-11-24 | 2018-05-01 | 中粮生化能源（衡水）有限公司 | A kind of pusher reaction unit and its cultural method for cultivating aerobic particle mud |
| WO2018157766A1 (en) * | 2017-03-02 | 2018-09-07 | 可事托环保设备（上海）有限公司 | Multi-unit modified sequencing batch reactor and applications thereof |
| CN108793409A (en) * | 2018-08-29 | 2018-11-13 | 陕西朗正环保科技有限公司 | A kind of sewage-treatment plant suitable for country sewage changes in flow rate |
| CN115477392A (en) * | 2022-10-28 | 2022-12-16 | 中絮生物技术(武汉)有限公司 | Three-dimensional laminated biochemical treatment device and process method based on simultaneous nitrification and denitrification |
-
2003
- 2003-11-17 CN CNA2003101113935A patent/CN1544364A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100503482C (en) * | 2004-12-31 | 2009-06-24 | 可事托环保设备（上海）有限公司 | A new sewage treatment method |
| CN1686862B (en) * | 2005-03-29 | 2011-08-31 | 上海市政工程设计研究院 | Improved type alternated technique for wastewater treatment of activated sludge process and equipment |
| CN100369830C (en) * | 2006-03-09 | 2008-02-20 | 武汉凯迪水务有限公司 | Waste water treating process of circulation sequence batched active sludge and its active sludge reactor |
| CN100418908C (en) * | 2006-10-30 | 2008-09-17 | 江明辉 | Sewage deep treatment method and device without sludge discharge |
| CN102531270A (en) * | 2010-12-28 | 2012-07-04 | 中国市政工程西北设计研究院有限公司 | Multi-section multi-step anaerobic-oxic (AO) biological reaction tank |
| CN102259981A (en) * | 2011-07-08 | 2011-11-30 | 中国矿业大学 | Sequencing batch biological phosphorus and nitrogen removal process |
| CN102259981B (en) * | 2011-07-08 | 2012-11-28 | 中国矿业大学 | A Sequencing Batch Biological Phosphorus and Nitrogen Removal Process |
| WO2018157766A1 (en) * | 2017-03-02 | 2018-09-07 | 可事托环保设备（上海）有限公司 | Multi-unit modified sequencing batch reactor and applications thereof |
| CN107973398A (en) * | 2017-11-24 | 2018-05-01 | 中粮生化能源（衡水）有限公司 | A kind of pusher reaction unit and its cultural method for cultivating aerobic particle mud |
| CN108793409A (en) * | 2018-08-29 | 2018-11-13 | 陕西朗正环保科技有限公司 | A kind of sewage-treatment plant suitable for country sewage changes in flow rate |
| CN108793409B (en) * | 2018-08-29 | 2023-12-29 | 中化学朗正环保科技有限公司 | Sewage treatment device suitable for rural sewage flow change |
| CN115477392A (en) * | 2022-10-28 | 2022-12-16 | 中絮生物技术(武汉)有限公司 | Three-dimensional laminated biochemical treatment device and process method based on simultaneous nitrification and denitrification |
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