CN103723884A - Sewage treatment method of degrading COD, BOD, SS, and ammonia nitrogen - Google Patents
Sewage treatment method of degrading COD, BOD, SS, and ammonia nitrogen Download PDFInfo
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- CN103723884A CN103723884A CN201310639371.XA CN201310639371A CN103723884A CN 103723884 A CN103723884 A CN 103723884A CN 201310639371 A CN201310639371 A CN 201310639371A CN 103723884 A CN103723884 A CN 103723884A
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- 239000010865 sewage Substances 0.000 title claims abstract description 30
- 238000011282 treatment Methods 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 25
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 title claims abstract description 22
- 230000000593 degrading effect Effects 0.000 title abstract description 3
- 238000006243 chemical reaction Methods 0.000 claims abstract description 23
- 230000020477 pH reduction Effects 0.000 claims abstract description 18
- 239000010802 sludge Substances 0.000 claims abstract description 16
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 238000012544 monitoring process Methods 0.000 claims abstract description 10
- 238000005273 aeration Methods 0.000 claims abstract description 6
- 241000894006 Bacteria Species 0.000 claims abstract description 5
- 239000002253 acid Substances 0.000 claims abstract description 5
- 239000003513 alkali Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 208000014451 palmoplantar keratoderma and congenital alopecia 2 Diseases 0.000 claims description 18
- 230000007062 hydrolysis Effects 0.000 claims description 16
- 238000006460 hydrolysis reaction Methods 0.000 claims description 16
- 238000001556 precipitation Methods 0.000 claims description 14
- 238000006386 neutralization reaction Methods 0.000 claims description 12
- 230000003647 oxidation Effects 0.000 claims description 12
- 238000007254 oxidation reaction Methods 0.000 claims description 12
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 9
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid group Chemical group C(CC(O)(C(=O)O)CC(=O)O)(=O)O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 claims description 9
- 239000002131 composite material Substances 0.000 claims description 6
- 238000011068 loading method Methods 0.000 claims description 6
- 150000007524 organic acids Chemical class 0.000 claims description 6
- 239000012528 membrane Substances 0.000 claims description 5
- 230000000802 nitrating effect Effects 0.000 claims description 5
- 230000001877 deodorizing effect Effects 0.000 claims description 4
- 239000007789 gas Substances 0.000 claims description 4
- 238000010992 reflux Methods 0.000 claims description 4
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 claims description 3
- 239000004327 boric acid Substances 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 125000004122 cyclic group Chemical group 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- 238000011221 initial treatment Methods 0.000 abstract 1
- 229920002521 macromolecule Polymers 0.000 abstract 1
- 230000003472 neutralizing effect Effects 0.000 abstract 1
- 238000004062 sedimentation Methods 0.000 abstract 1
- 239000010813 municipal solid waste Substances 0.000 description 8
- 239000002351 wastewater Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000012545 processing Methods 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- 239000000945 filler Substances 0.000 description 3
- 229910001385 heavy metal Inorganic materials 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000000706 filtrate Substances 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 230000008595 infiltration Effects 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 206010021143 Hypoxia Diseases 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
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- CVTZKFWZDBJAHE-UHFFFAOYSA-N [N].N Chemical group [N].N CVTZKFWZDBJAHE-UHFFFAOYSA-N 0.000 description 1
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 230000003570 biosynthesizing effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000002361 compost Substances 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000001146 hypoxic effect Effects 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002352 surface water Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 238000004056 waste incineration Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000004065 wastewater treatment Methods 0.000 description 1
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- Y02W10/12—
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a sewage treatment method of degrading COD, BOD, SS, and ammonia nitrogen. Sewage enters into an adjusting tank through a machinery grizzly screen, and then flows through a hydrolyze acidification tank, a biological contact aeration tank, a neutralizing sedimentation tank, a filtering tank, a split type MBR, a CASS (cyclic activated sludge system) reaction tank, a balancing tank, an NF/RO system, and a monitoring tank in sequence. According to the invention, the sewage is deodorized and macromolecule organic matters are degraded by hydrolyzing acidification bacteria and compound acid; then, the pH value of the sewage is adjusted by adding alkali; after the primary treatment, treating the sewage with deepening treatment through the advanced split type MBR, the CASS reaction tank and the NF/RO system in sequence. The removal ratios of COD, BOD, SS, and ammonia nitrogen are high and above 95%; the effect is obvious; the effluent quality can meet standards completely.
Description
Technical field
the present invention relates to sewage treatment area, particularly the sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen.
Background technology
Along with improving constantly of China's urban life level, domestic refuse amount is also in continuous increase, and China has built a collection of domestic garbage treatment plant, and processing mode mainly contains waste incineration, landfill, compost and comprehensive utilization etc.The trash processing way that the advantages such as wherein, garbage loading embeading is relatively low with its working cost, management is relatively convenient, technology is comparatively ripe become China present stage particularly Small Urban extensively adopts.The percolate producing in garbage loading embeading process is to generally acknowledge in the world at present high density pollution waste water seriously polluted, that be difficult to processing, character complexity.Build percolate from garbage filling field treatment system, consider each factors such as treatment technology, treatment effect, investment and running cost, enforcement along with < < household refuse landfill sites pollution control criterion > > (GB16889-2008), it is stricter that water outlet discharge index requires, and this is just to treatment technology and technique is corresponding has proposed new requirement.
Percolate source and feature:
The generation of percolate is subject to many factors, and the water yield changes greatly and irregularities almost.It is mainly derived from the following aspects: the 1) infiltration of precipitation; 2) inflow of outside surface water; 3) moisture that rubbish itself contains; 4) water that the anaerobic digestion of microorganism produces; 5) infiltration of underground water.
The percolate of each landfill yard generally has following characteristics:
1) look, smell: percolate all has very high colourity, and that its outward appearance is more is dark brown, dun or black, and colourity can reach 2000-4000 doubly (extension rate), and rubbish putrefactive odor is extremely obvious;
2) pH: at the garbage loading embeading initial stage, the pH of percolate is between 6-7, and along with the passing of landfill time and stablizing of landfill yard, pH can be increased to 7-8;
3) BOD, COD concentration: initial landfill stage BOD, COD concentration are lower, are thousands of mg/L, landfill 6 months to 2.After 5 years, BOD can be up to 10000mg/L, and COD can be up to 30000mg/L.After this concentration starts to decline, but the speed of BOD density loss is greater than COD, until reach stable after 6-l5;
4) biodegradation character: landfill yard BOD/COD value in early stage is between 0.4-0.5, and biodegradability is good; Intermediary and later stages are because the lowering speed of BOD, COD concentration is different; BOD/COD value is down to last 0.05-0.2 gradually, and biodegradability is variation gradually;
5) SS(suspended substance): concentration is generally at 300-1000mg/L;
6) ammonia nitrogen (ammonia nitrogen): ammonia nitrogen concentration is higher is generally in 400mg/L left and right, sometimes up to 1000mg/L, even higher;
7) heavy metal: due to categorized consumer waste collect and landfill yard go-no-go not in place, cause many heavy metal refuses to exist wherein, cause the heavy metal content increase in percolate.
Summary of the invention
The object of the present invention is to provide the sewage water treatment method of a kind of COD of degraded, BOD, SS, ammonia nitrogen, to solve the problem proposing in above-mentioned background technology.
For achieving the above object, the invention provides following technical scheme:
The sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen, first sewage is entered to equalizing tank by mechanical grille, then flow through successively hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system, then flow into monitoring pool; In described hydrolysis acidification pool, be provided with acidication bacterium, also to hydrolysis acidification pool, add composite organic acid deodorizing, and regulate pH value for 5-6; The DO mass concentration of described biological contact oxidation pond is controlled as 2-4 mg/L; Described neutralization precipitation pond regulates pH value for 7-8 by adding alkali; By gas blower to aeration in equalizing tank, hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond and CASS reaction tank; The mud of described neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system carries out sludge dewatering after entering sludge sump, and sewage transport is to equalizing tank, and mud is transported outward.
As the further scheme of the present invention: in described composite organic acid, the volume ratio of each component is citric acid: acetic acid: oxysuccinic acid: boric acid=1:1:1:1; Described hydrolysis acidification pool COD volumetric loading N
v=2.5 kg/ (m
3d), ask to be 15 h during hydraulic retention.
As the further scheme of the present invention: described filtering basin are bag type filter device.
As the further scheme of the present invention: described split type MBR is a kind of detachable membrane biochemical reactor, comprises biochemical reactor and two UF systems, and biochemical reactor is divided into forward type denitrification tank and nitrating pot two portions.
As the further scheme of the present invention: described CASS reaction tank is provided with biological selecting area, aerobic area and main reaction region, establishes sludge reflux simultaneously.
As the present invention's scheme further: described CASS reaction tank is established 2 altogether, alternate run in parallel.
As the present invention's scheme further: two film systems that described NF/RO system is comprised of NF system and RO system.
As the further scheme of the present invention: described monitoring pool is used for monitoring whether conformance with standard of effluent quality, if meet, clear water outward transport; Otherwise water outlet enters equalizing tank circular treatment again.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention first carries out the larger molecular organics of deodorizing degraded by acidication bacterium and Compound-acid to sewage, then by plus-minus, neutralize and regulate pH value of sewage water, after above-mentioned preliminary treatment, by advanced person's split type MBR, CASS reaction tank, NF/RO system, deepen processing successively again, clearance to COD, BOD, SS, ammonia nitrogen is high, all can reach more than 95%, successful, effluent quality is conformance with standard completely.
Accompanying drawing explanation
Fig. 1 is the degrade sewage treatment process figure of COD, BOD, SS, ammonia nitrogen of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Refer to Fig. 1, in the embodiment of the present invention, the sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen, first sewage is entered to equalizing tank by mechanical grille, then flow through successively hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system, then flow into monitoring pool; By gas blower to aeration in equalizing tank, hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond and CASS reaction tank; The mud of described neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system carries out sludge dewatering after entering sludge sump, and sewage transport is to equalizing tank, and mud is transported outward.
Described hydrolysis acidification pool is first converted into the larger molecular organics of difficult degradation in waste water the small organic molecule of easy degraded by the effect of acidication bacterium, thereby improves the biodegradability of subsequent disposal; The built-in combined stuffing of hydrolysis acidification pool; Then to hydrolysis acidification pool, add composite organic acid deodorizing, and regulate pH value for 5-6, in described composite organic acid, the volume ratio of each component is citric acid: acetic acid: oxysuccinic acid: boric acid=1:1:1:1; Described hydrolysis acidification pool COD volumetric loading N
v=2.5 kg/ (m
3d), ask to be 15 h during hydraulic retention.
The DO mass concentration of described biological contact oxidation pond is controlled as 2-4 mg/L.Contact oxidation method is a kind of a kind of new wastewater biochemical facture that has activated sludge process and biomembrance process feature concurrently.The major equipment of this method is biological contact oxidation filter tank.In air-locked aeration tank, filler is housed, filler is submerged by water, and uses gas blower at filler bottom aeration aerating, air can be gone up down in vain, carries pending waste water secretly, in vain by partly arrive ground by filtrate, after air runaway, waste water is at the bottom of filtrate asks that lattice return to pond downwards on white.Active sludge is attached to filling surface, not with water flow, because microbial film is directly subject to the strong agitation of upstream, constantly updates, thereby has improved decontamination effect improving.From research situation both domestic and external, contact oxidation method have while processing, ask short, volume is little, good purification, effluent quality is good and stablize, mud do not need the advantages such as backflow is not expanded yet, power consumption is little.
Described neutralization precipitation pond regulates pH value for 7-8 by adding alkali, reaches the best pH condition of precipitation.
Described filtering basin are bag type filter device, for sewage enters split type MBR, prepare.
Described split type MBR is a kind of detachable membrane biochemical reactor, comprises biochemical reactor and two UF systems, and biochemical reactor is divided into forward type denitrification tank and nitrating pot two portions.In nitrating pot, by highly active aerobic microbiological effect, most of organism of degrading, an ammonia nitrogen part is removed by biosynthesizing, major part is transformed into nitrate and nitrite under nitrifier effect efficiently, be back to denitrification tank, in anaerobic environment, be reduced into nitrogen and discharge, reach the object of biological denitrificaion.Nitrating pot water outlet enters UF system, by UF system, carries out cement separation, and sludge reflux makes biochemical reactor keep higher sludge concentration, through the microorganism species that constantly domestication forms, organism to difficult for biological degradation in percolate is progressively degraded, and the water outlet of MBR system is aseptic, no suspended substance.
Described CASS reaction tank (cyclic activated sludge system, CASS) be one of Waste Water Treatment core structures, cyclic activated sludge system is the process of aerobic/hypoxic/anaerobic alternate run, mainly removes the COD in waste water, the pollution substances such as ammonia nitrogen and SS; This reaction tank is provided with biological selecting area, aerobic area and main reaction region, establishes sludge reflux simultaneously; CASS reaction tank is established 2 altogether, alternate run in parallel.
Described counterbalance cell plays CASS reaction tank intermittently water outlet and the continuous intermediate equilibria regulating effect of intaking of NF/RO system.Hydraulic detention time is 15h, inside establishes 2, water pump, Kai Yitai, standby one.
Two film systems that described NF/RO system is comprised of NF system and RO system; Described NF system is located in film treatment plant, adopts dense water internal-circulation type; The rate of recovery: more than 80%; Dow Chemical NF270-400 rolled films: 6; Membrane flux: JNF=22 L/h * m
3; Described RO system is located at film and is processed in car asks, adopts dense water internal-circulation type; The rate of recovery: more than 80%; Dow Chemical BW 30-365-FR rolled film: 6; Membrane flux: JNF=22 L/h * m
3.
Described monitoring pool is used for monitoring whether conformance with standard of effluent quality, if meet, and clear water outward transport; Otherwise water outlet enters equalizing tank circular treatment again.
Design objective of the present invention is as shown in table 1
Table 1
Actual water inlet and effluent quality during the invention process are as shown in table 2
Table 2
To those skilled in the art, obviously the invention is not restricted to the details of above-mentioned one exemplary embodiment, and in the situation that not deviating from spirit of the present invention or essential characteristic, can realize the present invention with other specific form.Therefore, no matter from which point, all should regard embodiment as exemplary, and be nonrestrictive, scope of the present invention is limited by claims rather than above-mentioned explanation, is therefore intended to include in the present invention dropping on the implication that is equal to important document of claim and all changes in scope.Any Reference numeral in claim should be considered as limiting related claim.
In addition, be to be understood that, although this specification sheets is described according to embodiment, but not each embodiment only comprises an independently technical scheme, this narrating mode of specification sheets is only for clarity sake, those skilled in the art should make specification sheets as a whole, and the technical scheme in each embodiment also can, through appropriately combined, form other embodiments that it will be appreciated by those skilled in the art that.
Claims (8)
1. the sewage water treatment method of the COD that degrades, BOD, SS, ammonia nitrogen, it is characterized in that, first sewage is entered to equalizing tank by mechanical grille, then flow through successively hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system, then flow into monitoring pool; In described hydrolysis acidification pool, be provided with acidication bacterium, also to hydrolysis acidification pool, add composite organic acid deodorizing, and regulate pH value for 5-6; The DO mass concentration of described biological contact oxidation pond is controlled as 2-4 mg/L; Described neutralization precipitation pond regulates pH value for 7-8 by adding alkali; By gas blower to aeration in equalizing tank, hydrolysis acidification pool, biological contact oxidation pond, neutralization precipitation pond and CASS reaction tank; The mud of described neutralization precipitation pond, filtering basin, split type MBR, CASS reaction tank, counterbalance cell and NF/RO system carries out sludge dewatering after entering sludge sump, and sewage transport is to equalizing tank, and mud is transported outward.
2. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, is characterized in that, in described composite organic acid, the volume ratio of each component is citric acid: acetic acid: oxysuccinic acid: boric acid=1:1:1:1; Described hydrolysis acidification pool COD volumetric loading N
v=2.5 kg/ (m
3d), ask to be 15 h during hydraulic retention.
3. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, is characterized in that, described filtering basin are bag type filter device.
4. the sewage water treatment method of degraded according to claim 1 COD, BOD, SS, ammonia nitrogen, it is characterized in that, described split type MBR is a kind of detachable membrane biochemical reactor, comprises biochemical reactor and two UF systems, and biochemical reactor is divided into forward type denitrification tank and nitrating pot two portions.
5. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, is characterized in that, described CASS reaction tank is provided with biological selecting area, aerobic area and main reaction region, establishes sludge reflux simultaneously.
6. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, is characterized in that, described CASS reaction tank is established 2 altogether, alternate run in parallel.
7. the sewage water treatment method of degraded COD, BOD according to claim 1, SS, ammonia nitrogen, is characterized in that two film systems that described NF/RO system is comprised of NF system and RO system.
8. the sewage water treatment method of degraded according to claim 1 COD, BOD, SS, ammonia nitrogen, is characterized in that, described monitoring pool is used for monitoring whether conformance with standard of effluent quality, if meet, and clear water outward transport; Otherwise water outlet enters equalizing tank circular treatment again.
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| CN201310639371.XA CN103723884B (en) | 2013-12-04 | 2013-12-04 | The sewage water treatment method of a kind of COD that degrades, BOD, SS, ammonia nitrogen |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105236693A (en) * | 2015-11-16 | 2016-01-13 | 广东紫方环保技术有限公司 | Industrial wastewater treatment device and treatment method |
| CN106219887A (en) * | 2016-08-30 | 2016-12-14 | 芜湖华海生物工程有限公司 | A kind of processing method producing waste water for allantoin production process |
| CN106277615A (en) * | 2016-08-30 | 2017-01-04 | 芜湖华海生物工程有限公司 | A kind of allantoin production process produces the process technique of waste water |
| CN107235535A (en) * | 2017-06-23 | 2017-10-10 | 中国矿业大学(北京) | A kind of method of advanced treatment of industrial waste water |
| CN107857435A (en) * | 2017-11-29 | 2018-03-30 | 杨雨洁 | Integrated city trees and shrubs system irrigation water purification and deodoration system |
| CN109019845A (en) * | 2018-08-03 | 2018-12-18 | 巢湖市渔郎渔具有限公司 | A kind of aerobic purification method of manufacture fishing net waste water acidification |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236693A (en) * | 2015-11-16 | 2016-01-13 | 广东紫方环保技术有限公司 | Industrial wastewater treatment device and treatment method |
| CN106219887A (en) * | 2016-08-30 | 2016-12-14 | 芜湖华海生物工程有限公司 | A kind of processing method producing waste water for allantoin production process |
| CN106277615A (en) * | 2016-08-30 | 2017-01-04 | 芜湖华海生物工程有限公司 | A kind of allantoin production process produces the process technique of waste water |
| CN107235535A (en) * | 2017-06-23 | 2017-10-10 | 中国矿业大学(北京) | A kind of method of advanced treatment of industrial waste water |
| CN107857435A (en) * | 2017-11-29 | 2018-03-30 | 杨雨洁 | Integrated city trees and shrubs system irrigation water purification and deodoration system |
| CN109019845A (en) * | 2018-08-03 | 2018-12-18 | 巢湖市渔郎渔具有限公司 | A kind of aerobic purification method of manufacture fishing net waste water acidification |
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| CN103723884B (en) | 2016-04-27 |
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