CN1294089C - Waste water treating systems - Google Patents
Waste water treating systems Download PDFInfo
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- CN1294089C CN1294089C CNB021374406A CN02137440A CN1294089C CN 1294089 C CN1294089 C CN 1294089C CN B021374406 A CNB021374406 A CN B021374406A CN 02137440 A CN02137440 A CN 02137440A CN 1294089 C CN1294089 C CN 1294089C
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Images
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Water Treatment By Electricity Or Magnetism (AREA)
- Physical Water Treatments (AREA)
Abstract
废水处理系统，包括沉淀池、浮选处理设备、曝气生物滤池；浮选处理设备包括罐体、支架、电极组；电极组设置于罐体内腔底部，包括基座、阴、阳极板、连接丝杆；阳极板为不溶性极板，如钛涂铱、钛涂钌阳极板；阴极板为不锈钢或石墨；曝气生物滤池包括池体、承托层、过滤层、出水配水管、曝气管；过滤层由活性陶粒组成。不溶性阳极在电流作用下，电极上释放出极细的氢和氧的微气泡，气泡附着于液体中的污染物上，并上浮；再经曝气生物滤池内活性陶粒及通入氧气，电化学无法处理的溶解性污染物被滤料上的微生物降解，从而达到净水的目的。本发明集电化学处理、过滤、生物降解于一体，具有体积小、出水水质好，出水悬浮物浓度低，管理方便等优点。
Wastewater treatment system, including sedimentation tank, flotation treatment equipment, biological aerated filter; flotation treatment equipment includes tank, bracket, electrode group; electrode group is set at the bottom of the tank cavity, including base, cathode, anode plate, connecting screw; the anode plate is an insoluble plate, such as titanium-coated iridium and titanium-coated ruthenium anode plates; the cathode plate is stainless steel or graphite; the biological aerated filter includes a tank body, a supporting layer, a filter layer, an outlet water distribution pipe, an aeration Trachea; filter layer is composed of activated ceramsite. Under the action of current, the insoluble anode releases extremely fine hydrogen and oxygen microbubbles on the electrode, and the bubbles attach to the pollutants in the liquid and float up; then pass through the active ceramsite in the biological aerated filter and oxygen, Soluble pollutants that cannot be treated electrochemically are degraded by microorganisms on the filter material, so as to achieve the purpose of water purification. The invention integrates electrochemical treatment, filtration and biodegradation, and has the advantages of small size, good quality of effluent, low concentration of suspended matter in effluent, convenient management and the like.
Description
Technical field
The present invention relates to Sewage treatment systems, particularly the food and drink waste water treatment system.
Background technology
Present existing food and drink waste water treatment technology or equipment are less, with only technology, mainly are medicament coagulation air-float, bio-contact oxidation, SBR, charcoal absorption etc.Therefore these treatment technologies are developed at the characteristics of food and drink waste water, have certain effect, are using under proper, the normal situation of operational administrative, can reach the water quality emission request of " integrated wastewater discharge standard " GB8978-1996 substantially.But because these technology generally are applicable to fairly large wastewater treatment, for for the wastewater treatment project of the little water yield of food and drink waste water, reflect some defectives in varying degrees, out-of-the-way as traditional medicament coagulation-dissolved air flotation process, need complicated support equipment, as air compressor machine, dissolving, dissolved air water pump, dissolved air release etc., facility investment, floor space have not only been increased, and operational administrative is had relatively high expectations, even also be difficult to the treatment effect that keeps good by professional management always; And for example bio-contact oxidation, SBR technology are all traditional biochemical processing, have to take up an area of big, shortcomings such as efficient is low, hygienic condition difference; And technologies such as charcoal absorption, membrane separation technique have the working cost height, often need reload or need shortcoming such as film cleaning.
In China, catering trade is very flourishing, and the pollution of its generation is also very serious, be mainly oil smoke gas, food and drink waste water, hogwash, wherein food and drink waste water pollutes the most serious, contain a large amount of animal-plant oil, washing composition, protein, impurity etc. in the waste water, directly discharging will cause the severe contamination in river course.According to reports, in Shanghai, 2.9 ten thousand tame restaurants are arranged at present approximately, and per hour Pai Fang food and drink waste water reaches 1.7 ten thousand tons, ton surplus the annual inflow river course about 1.5 ten thousand with regard to the oils index, pollution is well imagined, even like this, implement the only over one hundred family in restaurant that food and drink waste water is administered at present, except the factor of the aspects such as dynamics of idea, policy, efficiently, cheap, take up an area of for a short time, the shortage of the food and drink waste water treatment facility of convenient operation and management also is a big major cause.
Summary of the invention
The object of the present invention is to provide a kind ofly, overcome the Waste Water Treatment of present existing in prior technology defective at food and drink waste water concentration height, characteristics such as the water yield is little, quantity is many.
For achieving the above object, technical scheme of the present invention is that Waste Water Treatment comprises a settling tank, a flotation treatment facility, a BAF; Water enters the flotation treatment facility via described settling tank post precipitation, and pollutent is wherein scraped slag by flotation after filtered by BAF.
The flotation treatment facility is electric flotation treatment facility, comprises tank body, support, electrode group; Establish water inlet pipe, rising pipe on the described tank body; The electrode group is arranged at the tank inner chamber bottom; Tank inner chamber is established a dividing plate, and tank inner chamber is separated into reaction contact chamber and split cavity; The water inlet pipe outlet is positioned at tank inner chamber reaction contact chamber; Rising pipe is connected in the tank inner chamber split cavity; Slag scraping mechanism is arranged at the tank body top, comprises scraper plate, motor, ash shoot and residue outlet; Scraper plate is arranged at the tank inner chamber top, by electric motor driving; Ash shoot is installed in scraper plate below, tank inner chamber top, and residue outlet one end and ash shoot join, and the residue outlet the other end stretches out outside the tank body;
Described electrode group comprises pedestal, negative plate, positive plate and is connected screw mandrel; Described negative plate, positive plate are linked jointly by two connection screw mandrels, and are fixed in pedestal, pedestal and tank base sealed attachment; Negative plate, positive plate are alternately arranged, and be isolated with isolator between adjacent negative plate, positive plate; Described positive plate is insoluble pole plate; Described positive plate is a composite structure, and internal layer (matrix) is pure titanium, and outer is conduction, corrosion resistant material such as ruthenium oxide or iridium oxide coated anode plate; Described negative plate is a corrosion resistant material.Described corrosion resistant material is stainless steel or graphite material.
Described BAF comprises pond body, supporting layer, filtering layer and is embedded in water outlet water distributing pipe, aeration tube in the supporting layer; Supporting layer is positioned at body bottom, pond, and filtering layer is arranged at supporting layer top; Set out the water hole on the water outlet water distributing pipe, water outlet water distributing pipe one end is connected with rising pipe; Aeration tube is positioned at water outlet water distributing pipe top, offers qi-emitting hole on it, and aeration tube one end is connected with inlet pipe; Described supporting layer is a double-layer structure, is made of the different cobble of diameter respectively; Described filtering layer is made up of ceramics filling, and the haydite particle diameter is 4～8mm.
Equalizing tank is connected with settling tank, in establish a water pump, water is introduced into equalizing tank via described settling tank post precipitation, by the water pump in the equalizing tank water is squeezed into the flotation treatment facility.
Also be provided with an explosive barrel that adds that flocculation agent is added described flotation treatment facility.Also be provided with one for BAF provides the blower fan of oxygen, it is connected with aeration tube one end by inlet pipe.
Also connect a centrifugal dewatering of sludge machine on the described flotation treatment facility, the scum silica frost that the flotation treatment facility scrapes is isolated mud via this centrifuge.
Wherein electroflotation has adopted insoluble positive electrode, under certain galvanic action, because the electrolysis of water, on electrode, discharge the superfine hydrogen and the microbubble of oxygen, after these bubbles enter liquid, can be attached on the pollutent, and make the pollutent come-up, in order to promote treatment effect, dosing coagulant suitably.In electrolytic process, exist simultaneously the electrochemical oxidation effect, making the organic pollutant in the waste water is the easy degradation treatment material of innoxious substance or small molecules by the anode electrochemical oxidation conversion directly, there is the indirect oxidation effect in electrolysis simultaneously, produce the extremely strong active substance of oxidisability by electrolysis, as HO, O
2Deng free radical, make pollutent obtain indirect oxidation and decompose.Therefore electric floatation process is compared with traditional technology, be not only that equipment is simple, and processing efficiency is higher, can reach the grade III Standard of " integrated wastewater discharge standard " through the waste water of electric flotation processing.Consider in the higher occasion of processing requirements, on the waste water basis of electrochemical treatment, adopt BAF BAF as the two-stage biological treatment process, BAF technology is the biomembrance process treatment technology of a new generation, in equipment, place the active haydite of high-strength light wear resistance, supply with a certain amount of oxygen at the bottom of the pond, the waste water haydite of flowing through, wherein the dissolubility pollutant that can't handle of electrochemical method is by the microbiological deterioration on the filtrate, thereby reaches the water purifying purpose, because BAF technology has the characteristics of high loading, union is filtered, biological degradation is in one, and it is little that equipment has a volume, need not settling tank, effluent quality is good, the water outlet concentration of suspension is low, advantages such as convenient management.
Effect of the present invention
The technical indicator that present device can reach, as shown in the table:
| Sequence number | Project | Raw water quality | The flotation effluent quality * | The |
| 1 | COD Cr | ≤2000 | ≤500 | ≤100 |
| 2 | BOD 5 | ≤900 | ≤300 | ≤20 |
| 3 | SS | ≤1500 | ≤400 | ≤70 |
| 4 | | 6～8 | 6～9 | 6～9 |
| 5 | LAS | ≤100 | ≤20 | ≤5 |
| 6 | Oil | ≤1000 | ≤100 | ≤10 |
* reach " integrated wastewater discharge standard " GB89781996 grade III Standard
* reaches " integrated wastewater discharge standard " GB89781996 primary standard
The present invention has following characteristics
1. technical process is simple, no loaded down with trivial details utility appliance, have the investment low, facility compact is taken up an area of advantages such as little.
2. treatment apparatus efficiency height, electrochemical process, the comprehensive materialization of BAF, biochemical two greatly efficiently treatment technology in one, so degree of treatment height, stable effluent quality.
3. convenient operation and management can realize automatization, need not loaded down with trivial details operation.
4. processing costs is low.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Fig. 2 is an electrode group structure elevational schematic view of the present invention.
Fig. 3 is an electrode group structure floor map of the present invention.
Embodiment
As shown in Figure 1, the Waste Water Treatment of the present invention's design comprises a settling tank 1, one flotation treatment facility 2, BAF 3;
Described electrode group 23 comprises pedestal 231, negative plate 232, positive plate 233, connects screw mandrel 234,235; Described negative plate 232, positive plate 233 are linked jointly by two connection screw mandrels 234,235, and are fixed in pedestal 231, pedestal 231 and tank body 20 bottom sealed attachment; Negative plate 232, positive plate 233 arrange that alternately pole span is 10～15mm; Adjacent negative plate 232,233 of sun are isolated with isolator 236; Described positive plate 233 is insoluble pole plate, and it is a composite structure, and skin is a corrosion resistant material, as titanium be coated with iridium, titanium is coated with the ruthenium positive plate; Described negative plate 232 is corrosion resistant material such as stainless steel 1Cr18Ni9Ti or graphite material formation; Isolated to prevent mutual conduction between adjacent unlike material pole plate with the insulated nylon packing ring; In order to prevent that copper screw mandrel and copper nut after charged from producing corrosion, the bottom adopts insulating Resins, epoxy to fill, and bottom PVC backing plate effect to be isolated equipment Steel Sheel conduct electricity to prevent apparatus casing with the electrode group; Two connection screw mandrels 234,235 stretch out housing 20 and connect external direct supply respectively; Adopt nylon ring and watertight rubber circle sealing between screw mandrel and Steel Sheel; Electrode group 23 and pedestal 231 thereof adopt the flange form bolt to be connected with housing 20, and with watertight rubber pad sealing, in order to loading and unloading and maintenance.
Described BAF 3 comprises pond body 30, supporting layer 31, filtering layer 32 and is embedded in water outlet water distributing pipe 34, aeration tube 33 in the supporting layer 31; Supporting layer 31 is positioned at pond body 30 bottoms, and filtering layer 32 is arranged at supporting layer 31 tops; Offer the posticum that the aperture is 10mm on the water outlet water distributing pipe 34, water outlet water distributing pipe 34 1 ends are connected with rising pipe 35; Aeration tube 33 is positioned at water outlet water distributing pipe 34 tops, offers qi-emitting hole on it, and aeration tube 33 1 ends are connected with inlet pipe 601; Inlet pipe 601 connects a blower fan that oxygen is provided for BAF; Supporting layer 31 is a double-layer structure, is made of the different cobble 311 of diameter respectively, and lower floor is the cobble of 16～32mm, and the upper strata is the cobble of 8～16mm, and filtering layer 32 is made up of ceramics filling 321, and the haydite particle diameter is 4～8mm.
Equalizing tank 12 is connected with settling tank 11, in establish a water pump 121, water is introduced into equalizing tank 12 via described settling tank 11 post precipitations, by the water pumps 121 in the equalizing tank 12 water is squeezed into flotation treatment facility 2.
Also connect a centrifugal dewatering of sludge machine 5 on the described flotation treatment facility, the scum silica frost that the flotation treatment facility scrapes is isolated mud via this centrifuge.
A back flushing or spilling water groove 36 are established in the top of BAF 3, when the haydite layer stops up, for the back flushing water outlet provides outlet.
Food and drink waste water is collected by water inlet manifold 101 and is flowed into simple and easy oil partiting precipitation pool 1, through precipitation, oil removal preliminary treatment, remove part oil slick and suspended substance swill, upper strata oil slick and lower sediment thing are regularly artificial to be removed, flow into equalizing tank 12 through pretreated waste water by oil partiting precipitation pool rising pipe 102, oil partiting precipitation pool 11 is a Round Sump with equalizing tank 12, waste water in the equalizing tank 12 promotes by lift pump 121, enter flotation treatment facility 2 by flotation treatment facility water inlet pipe 24, water pump opens and closes by liquid level switch control; Storage explosive barrel 4 is stored the flocculation agent aluminium chlorohydroxide, medicament is squeezed in flotation treatment facility 2 water inlet pipes 24 by chemical feed pipe 401 by volume pump 402, and after contact chamber 201 with reaction that medicament blended waste water enters flotation treatment facility 2, the electrode group 23 that device bottom is installed, behind the energising D.C. regulated power supply, produce superfine hydrogen and oxygen bubbles on electrode group 23 plates, with the reaction of water inlet thorough mixing, the reaction times of reaction contact chamber 201 reaction zones is 6 minutes, bubble is attracted on the flco, and make the pollutent come-up enter electrodeless reaction contact zone of action, chamber 201 top, upflow velocity is 15mm/s, then enter split cavity 202, band gas flco continues come-up and forms scum layer, and the clear water that obtains mud-water separation flows downward and enters rising pipe 26 and enter effluent trough by flotation treatment facility rising pipe 27 device for transferring, enters BAF 3, and disengaging zone 201 downward flow velocitys are 2.0mm/s.The formed scum silica frost in top layer is scraped into ash shoot and by scum pipe by the slag scraping mechanism of rotation and is entered centrifugal dewatering of sludge machine 5, and the mud cake outward transport after the centrifuge dehydration goes out clearly, and the scraper plate linear velocity on the slag scraping mechanism is 4m/min.Processing through the flotation treatment facility, oil, most of pollutent such as suspended substance can obtain electrolytic decomposition, flotation separation is handled, the pollutent gravity flow enters BAF 3 among the waste water remnants, BAF adopts downflow system, the waste water ceramics filling 321 of flowing through from top to bottom, the filter tank adopts 4～8mm ceramics filling 321 to have very big specific surface area, avoided the incident conglomeration of existing filler, problems such as obstruction, it is good to have mass transfer effect, the coefficient of oxygen utilization height, the characteristics that pollutants removal rate is high, aeration tube 33 is arranged at the top in the supporting layer 31,0.30m at the bottom of the pond, water outlet water distributing pipe 34 are arranged at the below in the supporting layer 31,0.10m at the bottom of the pond, aeration and biological is filtered 3 water outlets by total rising pipe 35 dischargings, blower fan 6 provides oxygen by water inlet pipe 601 for the microorganism in the BAF, and fan delivery is by flooding velocity and concentration decision, and general gas-water ratio is 10: 1.For the outlet that guarantees filter back washing water with prevent the excessive spill-over phenomenon that causes of flooding velocity, back flushing or spilling water groove 36 are set, water outlet enters equalizing tank 12 by upflow tube 361.All waste pipes, sludge pipe, aeration tube all adopt galvanized steel pipe or engineering plastics pipe, and chemical feed pipe adopts nylon tube; Simple and easy oil partiting precipitation pool, equalizing tank adopt brick structure, are complete buried form, and establish inspection manhole, and flotation treatment facility, BAF adopt steel construction, are arranged on the ground.
Claims (12)
1. Waste Water Treatment, comprise a settling tank, it is characterized in that, also comprise a flotation treatment facility and a BAF, water enters the flotation treatment facility via described settling tank post precipitation, and pollutent is wherein scraped slag by flotation after filtered by BAF;
Wherein, described flotation treatment facility is an electric flotation treatment facility, and this electricity flotation treatment facility comprises tank body, support and electrode group; Establish water inlet pipe and rising pipe on the described tank body; The electrode group is arranged at the tank inner chamber bottom;
Described tank inner chamber is established a dividing plate, and tank inner chamber is separated into reaction contact chamber and split cavity; Described water inlet pipe outlet is positioned at tank inner chamber reaction contact chamber; Rising pipe is connected in the tank inner chamber split cavity;
Slag scraping mechanism is arranged at the tank body top, comprises scraper plate, motor, ash shoot and residue outlet; Scraper plate is arranged at the tank inner chamber top, by electric motor driving; Ash shoot is installed in scraper plate below, tank inner chamber top, and residue outlet one end and ash shoot join, and the residue outlet the other end stretches out outside the tank body;
Described electrode group comprises pedestal, negative plate, positive plate and is connected screw mandrel; Described negative plate, positive plate are linked jointly by two connection screw mandrels, and are fixed in pedestal, pedestal and tank base sealed attachment; Negative plate, positive plate are alternately arranged, and be isolated with isolator between adjacent negative plate, positive plate.
2. Waste Water Treatment as claimed in claim 1 is characterized in that, described positive plate is insoluble pole plate.
3. Waste Water Treatment as claimed in claim 1 is characterized in that, described positive plate is a composite structure, and skin is corrosion-resistant material.
4. Waste Water Treatment as claimed in claim 1 is characterized in that, described negative plate is a corrosion resistant material.
5. Waste Water Treatment as claimed in claim 4 is characterized in that, described corrosion resistant material is stainless steel or graphite material.
6. Waste Water Treatment as claimed in claim 1 is characterized in that, described BAF comprises pond body, supporting layer, filtering layer and is embedded in water outlet water distributing pipe, aeration tube in the supporting layer; Supporting layer is positioned at body bottom, pond, and filtering layer is arranged at supporting layer top; Set out the water hole on the water outlet water distributing pipe, water outlet water distributing pipe one end is connected with rising pipe; Aeration tube is positioned at water outlet water distributing pipe top, offers qi-emitting hole on it, and aeration tube one end is connected with inlet pipe.
7. Waste Water Treatment as claimed in claim 6 is characterized in that, described supporting layer is a double-layer structure, is made of the different particle of diameter respectively.
8. Waste Water Treatment as claimed in claim 7 is characterized in that described supporting layer is made of cobble.
9. Waste Water Treatment as claimed in claim 6 is characterized in that described filtering layer is made up of ceramics filling, and the haydite particle diameter is 4～8mm.
10. Waste Water Treatment as claimed in claim 1 is characterized in that, also comprises an equalizing tank, this equalizing tank is connected with settling tank, in establish a water pump, water is introduced into equalizing tank via described settling tank post precipitation, by the water pump in the equalizing tank water is squeezed into the flotation treatment facility.
11. Waste Water Treatment as claimed in claim 1 is characterized in that, also is provided with an explosive barrel that adds that flocculation agent is added described flotation treatment facility.
12. Waste Water Treatment as claimed in claim 1 or 2 is characterized in that, also connects a centrifugal dewatering of sludge machine on the described flotation treatment facility, the scum silica frost that electric flotation treatment facility scrapes is isolated mud via this centrifuge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021374406A CN1294089C (en) | 2002-10-15 | 2002-10-15 | Waste water treating systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021374406A CN1294089C (en) | 2002-10-15 | 2002-10-15 | Waste water treating systems |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1490261A CN1490261A (en) | 2004-04-21 |
| CN1294089C true CN1294089C (en) | 2007-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021374406A Expired - Fee Related CN1294089C (en) | 2002-10-15 | 2002-10-15 | Waste water treating systems |
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| Country | Link |
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| CN (1) | CN1294089C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102206008B (en) * | 2011-04-25 | 2012-08-08 | 宁波圣莱达电器股份有限公司 | Small-flow electromagnetic water quality treatment device |
| CN103570209A (en) * | 2012-07-31 | 2014-02-12 | 西门子公司 | Electric dehydration device |
| CN103771639B (en) * | 2014-01-13 | 2015-07-29 | 河海大学 | A kind of oily wastewater treatment method and equipment |
| CN106186208A (en) * | 2016-08-10 | 2016-12-07 | 昆山福松环保设备有限公司 | Sewage-treatment plant and apply its sewage water treatment method |
| CN109052737A (en) * | 2018-09-29 | 2018-12-21 | 中山市爱科应用科技有限公司 | A kind of pollution water deodoring purifying processing device |
| CN111608622B (en) * | 2020-05-22 | 2021-01-08 | 大庆德尔福石油钻采科技开发有限公司 | Intelligent water injection device for oil field water injection well |
| CN117735676B (en) * | 2023-12-28 | 2024-09-03 | 青岛海发环保产业控股有限公司 | Equipment for advanced treatment of sewage and process method thereof |
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|---|---|---|---|---|
| SU916412A1 (en) * | 1978-05-17 | 1982-03-30 | Le Nii Akademii Kommunalnogo K | Method of purifying liquids |
| CN2133573Y (en) * | 1992-07-17 | 1993-05-19 | 周颖浩 | Electric condensing-floating purifying device of organic waste water |
| CN2189152Y (en) * | 1994-03-29 | 1995-02-08 | 中国市政工程东北设计研究院 | Aerobic filtration tank with inflated aeration |
| FR2800727A1 (en) * | 1999-11-05 | 2001-05-11 | Simop | Small semi-underground waste water treatment plant for pretreated sewage of domestic or communal origin, is based on aerobic zeolite biofilter |
| WO2002028786A2 (en) * | 2000-10-04 | 2002-04-11 | Great Circle Technologies, Inc. | Process and apparatus for treating wastewater |
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- 2002-10-15 CN CNB021374406A patent/CN1294089C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU916412A1 (en) * | 1978-05-17 | 1982-03-30 | Le Nii Akademii Kommunalnogo K | Method of purifying liquids |
| CN2133573Y (en) * | 1992-07-17 | 1993-05-19 | 周颖浩 | Electric condensing-floating purifying device of organic waste water |
| CN2189152Y (en) * | 1994-03-29 | 1995-02-08 | 中国市政工程东北设计研究院 | Aerobic filtration tank with inflated aeration |
| FR2800727A1 (en) * | 1999-11-05 | 2001-05-11 | Simop | Small semi-underground waste water treatment plant for pretreated sewage of domestic or communal origin, is based on aerobic zeolite biofilter |
| WO2002028786A2 (en) * | 2000-10-04 | 2002-04-11 | Great Circle Technologies, Inc. | Process and apparatus for treating wastewater |
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|---|---|
| CN1490261A (en) | 2004-04-21 |
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