CN105776542A - Improved AAO wastewater treatment process for obtaining standard IV-class surface water - Google Patents
Improved AAO wastewater treatment process for obtaining standard IV-class surface water Download PDFInfo
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- CN105776542A CN105776542A CN201610245879.5A CN201610245879A CN105776542A CN 105776542 A CN105776542 A CN 105776542A CN 201610245879 A CN201610245879 A CN 201610245879A CN 105776542 A CN105776542 A CN 105776542A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- Environmental & Geological Engineering (AREA)
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an improved AAO wastewater treatment process for obtaining standard IV-class surface water. The process includes the following steps that wastewater is pretreated to remove suspended solids (SS) in the wastewater through precipitation; pretreated outlet water passes through an AAO biochemical tank, outlet water from the AAO biochemical tank enters a secondary sedimentation tank for solid-liquid separation, supernatant liquid discharged out of the secondary sedimentation tank enters a coagulation reaction tank, and outlet water enters a denitrification filter tank to further remove residual nitrate nitrogen; outlet water from the denitrification filter tank enters a disinfection tank, and after being disinfected, the water is drained. Biological nitrogen and phosphorus removal treatment is achieved through alternative circulation of the three different anaerobic-anoxic-aerobiotic parts of the AAO biochemical tank, and three anoxic parts and three aerobiotic parts are alternately arranged; by connecting anoxic tanks and aerobiotic tanks alternately in series, the arrangement of a mixed liquid return device is omitted; by adding an external carbon source into the third anoxic tank, the insufficiency of a denitrification carbon source can be supplemented; by arranging the third aerobiotic tank, residues of the external carbon source of the third anoxic tank can be consumed.
Description
Technical field
The invention belongs to technical field of sewage, the improvement AAO sewage treatment process of a kind of surface water IV class up to standard.
Background technology
Along with China's water pollution problems highlights day by day, the raising of urban wastewater treatment discharge standard has been trend of the times.In terms of the requirement that current quality of water environment improves, the water outlet after many municipal sewage plants process often enters urban river, becomes the water body in river.The existing sewage disposal plant effluent of China, one-level A in the many references of discharge standard " GB 18918-2002 urban wastewater treatment firm pollutant emission standard ".But for one-level A standard, its water quality just corresponds to the bad V class water of surface water.This water quality is discharged into and several cause water body the most not repaired without in the water body environment of self-purification capacity, polluted on the contrary, the phenomenon of ' controlling dirtier and dirtier ' then occurs.Increasingly sharpening of water pollution, an urgent demand effluent of municipal sewage plant reaches earth's surface class IV class standard.30mg/l will be reduced to by CODCr by the 50mg/L of one-level A；BOD5 is reduced to 6mg/L by the 10mg/L of one-level A；Ammonia nitrogen is by the 5mg/L(8mg/L of one-level A) it is reduced to 1.5mg/L(2.5mg/L)；Total phosphorus is reduced to 0.3mg/L by the 0.5mg/L of one-level A；Total nitrogen is reduced to 5mg/L(10mg/L by the 15mg/L of one-level A).At present, the ground such as Beijing, Kunming, Hefei launches practice the most successively, and the requirement to sewage effluents CODCr, ammonia nitrogen, total nitrogen, total phosphorus etc. is higher.
Summary of the invention
For the deficiencies in the prior art, the present invention proposes the improvement AAO sewage treatment process of a kind of surface water up to standard IV class.
The purpose of the present invention can be achieved through the following technical solutions:
The improvement AAO sewage treatment process of a kind of surface water IV class up to standard, it is characterised in that described sewage treatment process comprises the following steps:
(1) sewage removes the ss suspended solid in water through pretreatment precipitation；
(2) pretreatment water outlet respectively enters anaerobic pond and the second anoxic pond, described anaerobic pond water outlet enters the first anoxic pond, described first anoxic pond water outlet enters the first Aerobic Pond, described first Aerobic Pond water outlet enters the second anoxic pond, described second anoxic pond water outlet enters the second Aerobic Pond, described second Aerobic Pond water outlet enters the 3rd anoxic pond, and described 3rd anoxic pond water outlet enters the 3rd Aerobic Pond, and described 3rd Aerobic Pond part mixed-liquor return is to the first anoxic pond；
(3) the 3rd Aerobic Pond water outlets enter second pond and carry out solid-liquid separation, and a mud part for precipitation is back to anaerobic pond, and a part is as excess sludge discharge；
(4) supernatant that second pond is discharged enters coagulation reaction tank, and water outlet enters denitrification filter pool and removes the nitrate nitrogen of residual further；
(5) denitrification filter pool water outlet enters after sterilization pool carries out disinfection and discharges.
As preferred further, pre-treatment step of the present invention is that sewage carries out preliminary sedimentation through setting pot or sedimentation tank.
As preferred further, the 3rd anoxic pond of the present invention adds carbon source, and the ammonia nitrogen that the second Aerobic Pond produces utilizes additional carbon to carry out denitrification for Removing Nitrogen.
As preferred further, coagulation reaction tank of the present invention adds chemical dephosphorization medicament, and it is iron salt or aluminium salt that described chemical dephosphorization adds medicament.
Beneficial effects of the present invention: AAO technique is improved by the present invention, AAO biochemistry pool utilizes the alternate cycles of three different pieces of anaerobic-anoxic-oxic to realize biological phosphate-eliminating denitrogenation processing, anoxia part and aerobic part are respectively provided with three, and are arranged alternately, and anaerobic pond is used for biological phosphate-eliminating；Anaerobic pond and the second anoxic pond use segmental influent, it is possible to make full use of the carbon source in former water and carry out denitrification for Removing Nitrogen；The alternately series connection of anoxic pond and Aerobic Pond, decreases the setting of mixed-liquor return device；3rd anoxic pond arranges adding of additional carbon, it is possible to make up the deficiency of denitrifying carbon source；The setting of the 3rd Aerobic Pond, can consume the residual of the 3rd anoxic pond additional carbon.The present invention can make full use of former water carbon source and carry out the pre-denitrification and denitrogenation of AAO technique, in combination with rear-mounted denitrification filter tank advanced nitrogen, and the chemical dephosphorization technology of the degree of depth, it can be ensured that the stable realization of class IV class water Effluent criteria.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Detailed description of the invention
Such as Fig. 1.The present invention proposes the improvement AAO sewage treatment process of a kind of surface water up to standard IV class, comprises the following steps:
1, the sewage that Sewage Plant produces precipitates, through the pretreatment of setting pot or sedimentation tank, the SS removed in water, it is ensured that stablizing of subsequent biochemical reaction.SS refers to the float in sewage.
2, first paragraph pretreatment water outlet initially enters anaerobic pond, and in anaerobic pond, polyP bacteria utilizes the Organic substance in former water to carry out anaerobic phosphorus release as carbon source and the energy；Anaerobic pond goes out water mixed liquid and enters the first anoxic pond, and in the first anoxic pond, the Organic substance that the abundant anaerobic pond of denitrifying bacterium does not runs out of is that carbon source carries out anti-nitration reaction, the nitrate nitrogen carried changes into nitrogen remove in mixed liquor；First anoxic pond goes out water mixed liquid and enters the first Aerobic Pond, and the Organic substance of residual in the first Aerobic Pond is carried out carburizing reagent further, and the ammonia nitrogen in the most former water carries out nitration reaction and becomes nitrate nitrogen；First Aerobic Pond water outlet enters the second anoxic pond, and the second segment of pretreatment water outlet simultaneously enters the second anoxic pond, and in the second anoxic pond, the former water Organic substance of the second segment of the Nitrate-N Use pretreatment water outlet that the first Aerobic Pond produces is carbon source, carries out denitrification for Removing Nitrogen；Second anoxic pond water outlet enters the second Aerobic Pond, and in the second Aerobic Pond, in the second anoxic pond, ammonia nitrogen carries out nitration reaction and becomes nitrate nitrogen, and residual organic matter carries out carbonization removal simultaneously；Second Aerobic Pond water outlet enters the 3rd anoxic pond, and meanwhile, the 3rd anoxic pond adds additional carbon, and in the 3rd anoxic pond, the ammonia nitrogen that the second Aerobic Pond produces utilizes additional carbon to carry out denitrification for Removing Nitrogen；3rd anoxic pond water outlet enters the 3rd Aerobic Pond, and in the 3rd Aerobic Pond, in the 3rd anoxic pond, ammonia nitrogen carries out nitration reaction and becomes nitrate nitrogen, and residual organic matter carries out carbonization removal simultaneously, and the 3rd Aerobic Pond part mixed-liquor return is to the first anoxic pond.
3, the 3rd Aerobic Pond water outlet enters second pond, and the settled sludge that second pond produces enters anaerobic pond, and a part is as excess sludge discharge.
4, the supernatant that second pond is discharged enters coagulation reaction tank, and adds chemical dephosphorization medicament, carries out chemical dephosphorization, and it is iron salt or aluminium salt that chemical dephosphorization adds medicament, and described added amount of chemical determines according to sewage quantity and pollutant load；Water outlet enters denitrification filter pool and further removes the nitrate nitrogen of residual, to reach to remove the purpose of total nitrogen, and the metal phosphorizing compound flco that coagulation reaction tank produces is carried out filtration removes except total phosphorus.
5, denitrification filter pool water outlet enters after sterilization pool carries out disinfection and discharges.
Above content is only to present configuration example and explanation; described specific embodiment is made various amendment or supplements or use similar mode to substitute by affiliated those skilled in the art; without departing from invention structure or surmount scope defined in the claims, protection scope of the present invention all should be belonged to.
Claims (4)
1. the improvement AAO sewage treatment process of surface water IV class up to standard, it is characterised in that described sewage treatment process comprises the following steps:
(1) sewage removes the ss suspended solid in water through pretreatment precipitation；
(2) pretreatment water outlet respectively enters anaerobic pond and the second anoxic pond, described anaerobic pond water outlet enters the first anoxic pond, described first anoxic pond water outlet enters the first Aerobic Pond, described first Aerobic Pond water outlet enters the second anoxic pond, described second anoxic pond water outlet enters the second Aerobic Pond, described second Aerobic Pond water outlet enters the 3rd anoxic pond, and described 3rd anoxic pond water outlet enters the 3rd Aerobic Pond, and described 3rd Aerobic Pond part mixed-liquor return is to the first anoxic pond；
(3) the 3rd Aerobic Pond water outlets enter second pond and carry out solid-liquid separation, and a mud part for precipitation is back to anaerobic pond, and a part is as excess sludge discharge；
(4) supernatant that second pond is discharged enters coagulation reaction tank, and water outlet enters denitrification filter pool and removes the nitrate nitrogen of residual further；
(5) denitrification filter pool water outlet enters after sterilization pool carries out disinfection and discharges.
The improvement AAO sewage treatment process of surface water up to standard IV class the most according to claim 1, it is characterised in that described pre-treatment step is that sewage carries out preliminary sedimentation through setting pot or sedimentation tank.
The improvement AAO sewage treatment process of surface water up to standard IV class the most according to claim 1, it is characterised in that described 3rd anoxic pond adds carbon source, the ammonia nitrogen that the second Aerobic Pond produces utilizes additional carbon to carry out denitrification for Removing Nitrogen.
The improvement AAO sewage treatment process of surface water up to standard IV class the most according to claim 1, it is characterised in that described coagulation reaction tank adds chemical dephosphorization medicament, it is iron salt or aluminium salt that described chemical dephosphorization adds medicament.
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Cited By (11)
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| CN106277574A (en) * | 2016-08-11 | 2017-01-04 | 浙江华强环境科技有限公司 | A kind of paper-making effluent treating process |
| CN106277575A (en) * | 2016-08-11 | 2017-01-04 | 浙江华强环境科技有限公司 | A kind for the treatment of for reuse technique of papermaking wastewater |
| CN108996840A (en) * | 2018-08-30 | 2018-12-14 | 中国葛洲坝集团水务运营有限公司 | The sewage disposal device and its method that enhanced biological nitrogen removal is combined with ceramic membrane |
| CN109354316A (en) * | 2018-11-21 | 2019-02-19 | 北京科泰兴达高新技术有限公司 | A kind of low-temperature wastewater treatment technique can reach IV class standard of surface water |
| CN109607782A (en) * | 2018-12-11 | 2019-04-12 | 深圳市瑞清环保科技有限公司 | Sewage-treatment plant and its processing method |
| CN111252906A (en) * | 2020-02-26 | 2020-06-09 | 深圳市华宇创鑫环境科技有限公司 | Slow-release carbon source, preparation method and wastewater treatment method |
| CN112374696A (en) * | 2020-11-09 | 2021-02-19 | 河北先河正合环境科技有限公司 | System and method for treating sewage by multistage multi-point water inflow enhanced denitrification |
| CN112591886A (en) * | 2020-11-02 | 2021-04-02 | 中车唐山机车车辆有限公司 | Rural sewage treatment method |
| CN113582340A (en) * | 2021-08-04 | 2021-11-02 | 深圳市环保科技集团有限公司 | Industrial wastewater total nitrogen treatment system |
| CN114349276A (en) * | 2021-12-30 | 2022-04-15 | 北控水务(中国)投资有限公司 | Sewage treatment system and method |
| CN115432818A (en) * | 2021-06-03 | 2022-12-06 | 北京大有汇泽科技有限公司 | Enhanced denitrification biological treatment method for sewage |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106277574B (en) * | 2016-08-11 | 2019-06-21 | 浙江华强环境科技有限公司 | A kind of paper-making effluent treating process |
| CN106277575A (en) * | 2016-08-11 | 2017-01-04 | 浙江华强环境科技有限公司 | A kind for the treatment of for reuse technique of papermaking wastewater |
| CN106277574A (en) * | 2016-08-11 | 2017-01-04 | 浙江华强环境科技有限公司 | A kind of paper-making effluent treating process |
| CN106277575B (en) * | 2016-08-11 | 2019-06-21 | 浙江华强环境科技有限公司 | A kind for the treatment of for reuse technique of papermaking wastewater |
| CN108996840A (en) * | 2018-08-30 | 2018-12-14 | 中国葛洲坝集团水务运营有限公司 | The sewage disposal device and its method that enhanced biological nitrogen removal is combined with ceramic membrane |
| CN108996840B (en) * | 2018-08-30 | 2024-04-19 | 葛洲坝集团生态环保有限公司 | Sewage treatment equipment and method for strengthening combination of biological denitrification and flat ceramic membrane |
| CN109354316A (en) * | 2018-11-21 | 2019-02-19 | 北京科泰兴达高新技术有限公司 | A kind of low-temperature wastewater treatment technique can reach IV class standard of surface water |
| CN109607782A (en) * | 2018-12-11 | 2019-04-12 | 深圳市瑞清环保科技有限公司 | Sewage-treatment plant and its processing method |
| CN111252906A (en) * | 2020-02-26 | 2020-06-09 | 深圳市华宇创鑫环境科技有限公司 | Slow-release carbon source, preparation method and wastewater treatment method |
| CN112591886A (en) * | 2020-11-02 | 2021-04-02 | 中车唐山机车车辆有限公司 | Rural sewage treatment method |
| CN112374696A (en) * | 2020-11-09 | 2021-02-19 | 河北先河正合环境科技有限公司 | System and method for treating sewage by multistage multi-point water inflow enhanced denitrification |
| CN115432818A (en) * | 2021-06-03 | 2022-12-06 | 北京大有汇泽科技有限公司 | Enhanced denitrification biological treatment method for sewage |
| CN113582340A (en) * | 2021-08-04 | 2021-11-02 | 深圳市环保科技集团有限公司 | Industrial wastewater total nitrogen treatment system |
| CN114349276A (en) * | 2021-12-30 | 2022-04-15 | 北控水务(中国)投资有限公司 | Sewage treatment system and method |
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