CN201751397U - Sewage treatment device of ozone and aeration biological filter pool - Google Patents
Sewage treatment device of ozone and aeration biological filter pool Download PDFInfo
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- CN201751397U CN201751397U CN2010201100108U CN201020110010U CN201751397U CN 201751397 U CN201751397 U CN 201751397U CN 2010201100108 U CN2010201100108 U CN 2010201100108U CN 201020110010 U CN201020110010 U CN 201020110010U CN 201751397 U CN201751397 U CN 201751397U
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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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Abstract
The utility model discloses a sewage treatment device of an ozone and aeration biological filter pool, which comprises an ozone generator, a high-efficiency gas-liquid mixing tower, a tail gas decomposer, at least one stage of reaction tank and a biological aerated filter pool, wherein an entrance of the high-efficiency gas-liquid mixing tower is connected with a water inlet pipeline; water flow enters into the biological aerated filter pool sequentially through the high-efficiency gas-liquid mixing tower and the reaction tanks; an exit arranged at the top of the biological aerated filter pool is connected with a water production pipeline; the high-efficiency gas-liquid mixing tower is connected with the ozone generator, so that the ozone generated by the ozone generator enters into the high-efficiency gas-liquid mixing tower and is decomposed in sewage; and the high-efficiency gas-liquid mixing tower and the reaction tanks are also connected with the tail gas decomposer, so that the generated tail gas can be treated by the tail gas decomposer. By adopting ozone oxidation, the sewage treatment device greatly improves the biochemical property of the sewage, greatly increases the load of the biological aerated filter pool and ensures the quality of the produced water to be better. After the ozone is oxidized, the dissolved oxygen in water body is greatly increased, and the aeration amount in the subsequent biological aerated filter pool is greatly reduced, so that the energy consumption is reduced.
Description
Technical field
The utility model discloses a kind of novel ozone and BAF waste disposal plant, belongs to technical field of sewage, especially relates to the waste disposal plant that adopts ozone oxidation to combine with BAF.
Background technology
Along with The development in society and economy and Increase of population, water resources has become the restraining factors of national economy Sustainable development.The water resources crisis that China faces is severe more, and China's water resources per capita only is 1/4th of world's per capita share, rapid development of economy, and industrial and agricultural production water and total amount of pollutants discharged constantly increase, and wastewater treatment rate is not high, has increased the weight of the natural water pollution.Therefore, improve the sewage disposal level, the waste water treating and reutilizing device that exploitation is suitable not only can the conservation of nature environment, has also solved present water scarcity problem.
Ozone has extremely strong oxidation susceptibility, and its oxidation capacity is only second to fluorine, is higher than chlorine and potassium permanganate, and ozone can decompose at short notice voluntarily, does not have secondary pollution, is ideal green oxidation medicament.At present, ozone technology has obtained application aspect many in water treatment field, and ozone not only has very high sterilization effect, can also be difficult to biodegradable organic pollutant in the oxidation removal water.But use the expense of ozone oxidation very high separately, and only most of larger molecular organics can be oxidized to small organic molecule, and organism thoroughly can not be removed.
BAF (BAF) is a kind of sewage treatment technique of the later development 1980s, and essence is a kind of biomembrance process, i.e. filled biomass filler in the aeration tank utilizes the processing unit of the microbial film degraded water pollutant that filling surface adheres to.Since selected filler self, the easy attached biological film of filling surface.The microorganism of numerous kinds and the quantity of growing in the microbial film has aerobic bacteria, and hold concurrently oxygen bacterium, anerobe so BAF all has a good effect of removing to the various organism in the water, also have very high removal efficient to ammonia nitrogen simultaneously.Though yet BAF efficient height, the water source that is only applicable to sewage of low concentration advanced treatment and the little pollution of former water is handled, and can't remove refractory organic.
At present, the equipment that also ozone oxidation is not combined with biological aerated filter in the sewage treatment process effectively promotes the filter effect of former water, so proposition of the present utility model is just arranged.
Summary of the invention
Deficiency at the sewage water filtration technology, the utility model provides a kind of ozone and BAF waste disposal plant, this device be fit to be handled the organic sewage of high density, difficult degradation, and have that low cost, high-level efficiency, equipment are simple, easy handling, product water water quality advantages of higher.
For achieving the above object, the utility model is achieved through the following technical solutions:
A kind of ozone and BAF waste disposal plant, comprise ozonizer, the high efficient gas and liquid mixing column, the tail gas splitter, at least one order reaction pond and BAF, the inlet of high efficient gas and liquid mixing column connects inlet channel, current enter into BAF through high efficient gas and liquid mixing column and each reaction tank successively, the BAF top is provided with outlet and is connected with the water producing pipe road, the high efficient gas and liquid mixing column is connected the ozone that ozonizer is produced and enters in the high efficient gas and liquid mixing column and be dissolved in the sewage with ozonizer, high efficient gas and liquid mixing column and reaction tank also are connected with the tail gas splitter makes it handle the tail gas of generation.
Further, described reaction tank is first order reaction pond and second order reaction pond, be communicated with the high efficient gas and liquid mixing column and the BAF of its front respectively after both serial connections, sewage respectively is 1.5-2h in the residence time in first order reaction pond and second order reaction pond, first order reaction pond, second order reaction pond and high efficient gas and liquid mixing column discharge tail gas absorb in the tail gas splitter, and the small amount of ozone in the tail gas is decomposed the back discharging.
Further, BAF is a vertical vessel, the upper end is opening or dead front type, container is divided into distributing water room, filtrate district from the bottom up successively, produces water and backwash water collecting chamber, be separated by, filter be installed on the filter plate by filter plate between distributing water room and the filtrate district, the filtrate district with produce water and backwash pool and separate by micro-strainer.
Further, the distributing water room district of BAF is connected to inlet channel, back flushing inlet channel and blow-off line, and the back flushing aerated conduit is installed in the distributing water room, and the back flushing aeration provides source of the gas for back flushing, and is furnished with the spiral aerator and carries out gas distribution.
Further, described spiral aerator is that the boring aeration pipeline on same horizontal plane is formed, and has adopted macropore exhaust bubble gas distribution, and gas promotes the aerator rotation, make gas carry out dextrorotation and derotation water conservancy diversion, the dextrorotation water conservancy diversion is a clockwise direction, and the derotation water conservancy diversion is counterclockwise, under two different directions cyclonic action, what evenly gather upwards produces bubble, the rotation of spiral aerator simultaneously also is that the water body that rises produces water turbulence, and filtrate is had good scouring effect.Cleaning way employing simultaneously is the mode that pulse gas dashes the combination of dashing with continuous water, strengthens the effect of back flushing.Control mode is to adopt the operated pneumatic valve on the full-automatic PLC control pipeline to open and close automatically, and the opening and closing time is identical, and valve opening and the cycle of closing are 30～60s, reach the purpose of pulse air feed backwash, and the backwash time is 5min.
Further, described filtrate is distinguished into two portions, and lower floor is a pebble bed, mainly plays the support effect, and the upper strata is a filter material layer, and described filtrate is zeolite, modified zeolite, gac, volcanic ash etc.
Further, in the described pebble bed aerating system is installed, aerating system comprises micro-hole aerator, and its principal feature is to produce small bubble, the about 0.1～0.2mm of bubble diameter, and gas, liquid contact area are big, and the coefficient of oxygen utilization height generally can reach 20～25%.
Further, described filtrate district is separated by micro-strainer with product water and backwash pool, leaves certain space between micro-strainer and filtrate, and filtrate expands and uses during for backwash.Spatial volume accounts for 10～15% of filtrate district volume.
Further, in described product water/backwash pool product water/backwash water collecting chamber is installed, product water/backwash water collecting chamber is made up of product water collecting chamber and backwash water collecting chamber and is separated by by stabilier, and water produced process tilted plate separator enters collecting chamber.
Characteristics of the present utility model mainly contain:
1) the utility model is compared with traditional BAF, and sewage enters the preceding ozone oxidation that adopts earlier of BAF, and the biochemical of sewage is improved greatly, and the BAF load also improves greatly, and product water water quality is also better.
2) ozone and sewage mix to adopt the high efficient gas and liquid mixing column, have advantages such as gas-liquid dissolved efficiency height, stable performance, easy to operate, easy care.
3) the ozone oxidation process has been passed through the two-stage reaction pond; ozone utilization rate is improved; simultaneously also provide the competent time to degrade automatically to the ozone that has neither part nor lot in oxidation; ensured the safety of microorganism in the follow-up BAF; adopt the tail gas splitter simultaneously; ozone in the tail gas is further decomposed the protection environmentAL safety.
4) after the ozone oxidation, the dissolved oxygen in the water body improves greatly, and the aeration rate in the follow-up BAF is significantly reduced, and has reduced energy consumption.
The back flushing of the utility model BAF adopts spiral aeration process and pulse gas to dash the mode of the combination of dashing with continuous water, recoil air-flow moment of certain intensity enters filtering layer and solid stream of water makes filtering layer be in the speed change swelling state jointly, microbial film and impurity come off under intensive shearing, impact effect fast, after the moment air-flow pulse, the stable gradually and sedimentation when the expansion filtering layer, open gas when not reaching dense state as yet once more, so filtering layer begins violent change of state of another cycle again.Wherein current play the result of the effect frequent operation of even recoil and rinsing filtering layer all the time and have strengthened the recoil process, thereby under the little situation of water consumption, air consumption, have guaranteed that higher backwash efficiency has improved backwash effect greatly.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing:
Embodiment: structure as shown in Figure 1, the utility model equipment comprises 1. inlet channels, 2. ozonizer, 3. exhaust emissions pipeline, 4. tail gas splitter, 5. high efficient gas and liquid mixing column, 6. first order reaction pond, 7. second order reaction pond, 8. distributing water room, 9. blow-off line, 10. back flushing aerated conduit, 11. aerated conduits, 12. micro-hole aerator, 13. pebble beds, 14. filter material layers, 15. micro-strainer, 16. produce water/backwash water collecting chamber, 17. stabiliers, 18. tilted plate separators, 19. water producing pipe road, 20. the backwash water pipeline, 21. filter plates, 22. filters, 23. the spiral aerator, 24. backwash water inlet channels.
As shown in Figure 1: during sewage disposal, the sewage that needs to handle enters high efficient gas and liquid mixing column 5 by inlet channel 1, and ozonizer 2 produces ozone simultaneously, also enters in the high efficient gas and liquid mixing column 5, ozone and sewage thorough mixing fully are dissolved in the sewage ozone.
As shown in Figure 1: mix the back and by pipeline sewage is imported in the first order reaction pond 6, ozone with organic pollutant degradation, improves the biodegradability of sewage in first order reaction pond 6.Sewage enters second order reaction pond 7 then, and the purpose that second order reaction pond 7 is set is that the raising ozone utilization rate provides enough residence time that the ozone that does not utilize is degraded automatically simultaneously, protects the safety of follow-up biochemical system.Sewage is 1.5-2h in the residence time in first order reaction pond 6 and second order reaction pond 7.Tail gas in high efficient gas and liquid mixing column 5, first order reaction pond 6 and the second order reaction pond 7 enters in the tail gas splitter 4 by the exhaust emissions pipeline, and a small amount of residual ozone in the tail gas is decomposed.
As shown in Figure 1, sewage through ozone oxidation enters in the distributing water room 8 by pipeline, and sewage enters in the filtrate after entering the filtrate district by filter 17, after filtrate adsorbed ammonia nitrogen, suspended substance, bacterium in the sewage etc., the various microorganisms in the filtrate district absorbed it.Produce water and enter product water/backwash pool, enter again in product water/backwash water collecting chamber 16, handle discharging or reuse at last by water producing pipe road 19 by micro-strainer 15.
As shown in Figure 1: aerated conduit 11 is arranged in below, filtrate district pebble bed, carries out micro-pore aeration by micro-hole aerator 12, improves dissolved oxygen content in the water body, satisfies the demand of microbial film aerobic bacteria on the filter material surface.
As shown in Figure 1, when the needs backwash, close inlet channel 1, open backwash water inlet channel 24 simultaneously, its current are identical during with works better through route, but big when flow velocity is more normally worked; Close aerated conduit 11 simultaneously, open the back flushing aerated conduit 10 in the distributing water room 8, carry out the backwash of spiral aeration, it is the mode that pulse gas dashes the combination of dashing with continuous water that cleaning way adopts, and strengthens the effect of back flushing.Control mode is to adopt the operated pneumatic valve on the full-automatic PLC control pipeline to open and close automatically, the opening and closing time is identical, and valve opening and the cycle of closing are 30～60s, reach the purpose of pulse air feed backwash, the backwash time is 5min, and backwash water is got rid of through backwash water water producing pipe road 20.
As shown in Figure 1: when BAF needs repairing, can open blow-off line 9, the water in the venting tank body is convenient to maintenance.
A kind of ozone and BAF waste disposal plant, comprise ozonizer 2, high efficient gas and liquid mixing column 5, tail gas splitter 4, reaction tank, BAF tank body, distributing water room 3, back flushing aerating system, aerating system, inlet channel 1, exhaust emissions pipeline 3, back flushing inlet channel 24, blow-off line 9, filtrate district produce water and backwash pool 16, produce water and backwash water pipeline.The BAF tank body is a vertical vessel, and the upper end is opening or dead front type, is divided into distributing water room 8, filtrate district in the tank body from the bottom up successively, produces water and backwash water collecting chamber.
The ozone that described ozonizer 2 produces enters in the high efficient gas and liquid mixing column 5 by pipeline, and sewage also enters efficient enterprise mixing column by inlet channel 1 simultaneously, and ozone fully is dissolved in the sewage.The exhaust emissions pipeline absorbs discharge tail gas in high efficient gas and liquid mixing column, first order reaction pond 6, the second order reaction pond 7 in the tail gas splitter 4, and the small amount of ozone in the tail gas is decomposed the back discharging.After first order reaction pond and second order reaction pond are installed in the high efficient gas and liquid mixing column; pass through pipe connection; ozone in reaction tank with organic pollutant degradation; improve the biodegradability of sewage; the purpose that second order reaction pond 7 is set is; the utilization ratio of ozone is improved, provide enough residence time that the ozone that does not utilize is degraded voluntarily simultaneously, protect the safety of follow-up biochemical system.Sewage all is 1.5-2h in the residence time in first order reaction pond and second order reaction pond.
As Fig. 1, the inlet channel of biological filter, back flushing inlet channel 24 and blow-off line 9 are installed in the distributing water room 8, when BAF needs repairing, can open blow-off line, and the water body in the venting tank body is convenient to maintenance; Described back flushing aerated conduit 10 is installed in the distributing water room, and the back flushing aeration provides source of the gas for back flushing, is furnished with spiral aerator 23 and carries out gas distribution.Described spiral aerator 23 is that the boring aeration pipeline on same horizontal plane is formed, adopted macropore exhaust bubble gas distribution, gas promotes the aerator rotation, makes gas carry out dextrorotation and derotation water conservancy diversion, and the dextrorotation water conservancy diversion is a clockwise direction, the derotation water conservancy diversion is counterclockwise, under two different directions cyclonic action, what evenly gather upwards produces bubble, the rotation of spiral aerator simultaneously, also be that the water body that rises produces water turbulence, filtrate is had good scouring effect.Cleaning way employing simultaneously is the mode that pulse gas dashes the combination of dashing with continuous water, strengthens the effect of back flushing.Control mode is to adopt the operated pneumatic valve on the full-automatic PLC control pipeline to open and close automatically, and the opening and closing time is identical, and valve opening and the cycle of closing are 30～60s, reach the purpose of pulse air feed backwash, and the backwash time is 5min.Be separated by, filter 22 be installed on the filter plate by filter plate 21 between distributing water room 8 and the filtrate district, the water body in the distributing water room evenly enters in the filtrate district through filter; Described filtrate is distinguished into two portions, and lower floor is a pebble bed, mainly plays the support effect, and the upper strata is a filter material layer 14.Described filtrate is zeolite, modified zeolite, gac, volcanic ash etc.Described aerating system is installed in the pebble bed 13, and aerator is a micro-hole aerator 12, and its principal feature is to produce small bubble, the about 0.1～0.2mm of bubble diameter, and gas, liquid contact area are big, and the coefficient of oxygen utilization height generally can reach 20～25%.Described filtrate district is separated by micro-strainer 15 with product water/backwash pool, leaves certain space between micro-strainer and filtrate, and filtrate expands and uses during for backwash.Spatial volume accounts for 10～15% of filtrate district volume.In described product water/backwash pool product water/backwash water collecting chamber is installed, they are separated by by stabilier 17, and enter collecting chamber through tilted plate separator, and tilted plate separator 18 can also precipitate the filtrate by micro-strainer.
Advantage of the present utility model mainly contains:
1) adopts steps such as the operation of PLC full automatic control, back flushing, reduce running cost.
2) ozone oxidation+BAF combination process, processing power improves greatly, especially is fit to handle high density, difficult degradation sewage.
3) effluent quality is good, can remove suspended substance, COD, bacterium and most ammonia-nitrogen in the sewage.
4) adopt ozone+biological aerated filter process, reduced cost of sewage disposal.
5) anti-shock loading is strong, and the expanded problem of no mud is strong to the tolerance of environmental variation.
The above record only for utilizing the embodiment of this origination techniques content, anyly is familiar with modification, the variation that this skill person uses this creation to do, and all belongs to the claim of this creation opinion, and is not limited to those disclosed embodiments.
Claims (9)
1. ozone and BAF waste disposal plant, it is characterized in that: comprise ozonizer, the high efficient gas and liquid mixing column, the tail gas splitter, at least one order reaction pond and BAF, the inlet of high efficient gas and liquid mixing column connects inlet channel, current enter into BAF through high efficient gas and liquid mixing column and each reaction tank successively, the BAF top is provided with outlet and is connected with the water producing pipe road, the high efficient gas and liquid mixing column is connected the ozone that ozonizer is produced and enters in the high efficient gas and liquid mixing column and be dissolved in the sewage with ozonizer, high efficient gas and liquid mixing column and reaction tank also are connected with the tail gas splitter makes it handle the tail gas of generation.
2. ozone according to claim 1 and BAF waste disposal plant, it is characterized in that: described reaction tank is first order reaction pond and second order reaction pond, be communicated with the high efficient gas and liquid mixing column and the BAF of its front respectively after both serial connections, sewage respectively is 1.5-2h in the residence time in first order reaction pond and second order reaction pond, first order reaction pond, second order reaction pond and high efficient gas and liquid mixing column discharge tail gas absorb in the tail gas splitter, and the small amount of ozone in the tail gas is decomposed the back discharging.
3. ozone according to claim 1 and BAF waste disposal plant, it is characterized in that: described BAF is a vertical vessel, the upper end is opening or dead front type, container is divided into distributing water room, filtrate district from the bottom up successively, produces water and backwash water collecting chamber, be separated by, filter be installed on the filter plate by filter plate between distributing water room and the filtrate district, the filtrate district with produce water and backwash pool and separate by micro-strainer.
4. according to claim 1 or 3 described ozone and BAF waste disposal plant, it is characterized in that: the distributing water room district of described BAF is connected to inlet channel, back flushing inlet channel and blow-off line, the back flushing aerated conduit is installed in the distributing water room, the back flushing aeration provides source of the gas for back flushing, and is furnished with the spiral aerator and carries out gas distribution.
5. ozone according to claim 4 and BAF waste disposal plant, it is characterized in that: described spiral aerator is formed for the boring aeration pipeline on same horizontal plane, adopted macropore exhaust bubble gas distribution, spiral aerator cleaning way employing simultaneously is the mode that pulse gas dashes the combination of dashing with continuous water, strengthen the effect of back flushing, spiral aerator control mode be adopt operated pneumatic valve on the full-automatic PLC control pipeline to open and close automatically and the opening and closing time identical.
6. ozone according to claim 3 and BAF waste disposal plant is characterized in that: described filtrate is distinguished into two portions, and lower floor is a pebble bed, and the upper strata is a filter material layer, and described filtrate is zeolite, modified zeolite, gac, volcanic ash.
7. ozone according to claim 6 and BAF waste disposal plant, it is characterized in that: in the described pebble bed aerating system is installed, aerating system comprises micro-hole aerator, and its principal feature is to produce small bubble, the about 0.1～0.2mm of bubble diameter.
8. ozone according to claim 3 and BAF waste disposal plant, it is characterized in that: described filtrate district is separated by micro-strainer with product water and backwash pool, leave certain space between micro-strainer and filtrate, spatial volume accounts for 10～15% of filtrate district volume.
9. ozone according to claim 3 and BAF waste disposal plant, it is characterized in that: be equipped with in described product water and the backwash pool and produce water and backwash water collecting chamber, product water and backwash water collecting chamber are made up of product water collecting chamber and backwash water collecting chamber and are separated by by stabilier, and water produced process tilted plate separator enters collecting chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201100108U CN201751397U (en) | 2010-01-29 | 2010-01-29 | Sewage treatment device of ozone and aeration biological filter pool |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010201100108U CN201751397U (en) | 2010-01-29 | 2010-01-29 | Sewage treatment device of ozone and aeration biological filter pool |
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| CN201751397U true CN201751397U (en) | 2011-02-23 |
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| CN2010201100108U Expired - Fee Related CN201751397U (en) | 2010-01-29 | 2010-01-29 | Sewage treatment device of ozone and aeration biological filter pool |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745863A (en) * | 2012-07-04 | 2012-10-24 | 哈尔滨工业大学 | High efficiency fluidization upward flow multilayer composite filter material biological filter tank coupled with ozonation and water treatment method thereof |
| CN104045206A (en) * | 2014-06-06 | 2014-09-17 | 南昌大学 | UV (ultraviolet)/O3+BAF (biological aerated filter) advanced oxidation sewage treatment facility |
| CN104710002A (en) * | 2015-03-24 | 2015-06-17 | 苏州汇龙滤膜工程有限公司 | Two-stage micro/nano aeration and catalytic ozonation wastewater treatment system |
| CN104961226A (en) * | 2015-06-29 | 2015-10-07 | 浙江大学 | Composite biological filter for treating high algae-laden and high ammonia-nitrogen raw water and application method thereof |
| CN108275848A (en) * | 2018-03-27 | 2018-07-13 | 中节能工程技术研究院有限公司 | A kind of wastewater treatment integrating device and method |
-
2010
- 2010-01-29 CN CN2010201100108U patent/CN201751397U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102745863A (en) * | 2012-07-04 | 2012-10-24 | 哈尔滨工业大学 | High efficiency fluidization upward flow multilayer composite filter material biological filter tank coupled with ozonation and water treatment method thereof |
| CN104045206A (en) * | 2014-06-06 | 2014-09-17 | 南昌大学 | UV (ultraviolet)/O3+BAF (biological aerated filter) advanced oxidation sewage treatment facility |
| CN104710002A (en) * | 2015-03-24 | 2015-06-17 | 苏州汇龙滤膜工程有限公司 | Two-stage micro/nano aeration and catalytic ozonation wastewater treatment system |
| CN104710002B (en) * | 2015-03-24 | 2019-11-26 | 苏州汇博龙环境技术有限公司 | A kind of micro-nano aeration and catalyzing ozonisation waste water treatment system of two-stage |
| CN104961226A (en) * | 2015-06-29 | 2015-10-07 | 浙江大学 | Composite biological filter for treating high algae-laden and high ammonia-nitrogen raw water and application method thereof |
| CN104961226B (en) * | 2015-06-29 | 2017-10-31 | 浙江大学 | A kind of complex biological filter and its application process for handling high algae high NH4 source water |
| CN108275848A (en) * | 2018-03-27 | 2018-07-13 | 中节能工程技术研究院有限公司 | A kind of wastewater treatment integrating device and method |
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Granted publication date: 20110223 Termination date: 20140129 |