CN102815841A - Reconstruction process of nitrogen and phosphorus removing by two-stage bio-contact oxidation - Google Patents
Reconstruction process of nitrogen and phosphorus removing by two-stage bio-contact oxidation Download PDFInfo
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- CN102815841A CN102815841A CN2012103112705A CN201210311270A CN102815841A CN 102815841 A CN102815841 A CN 102815841A CN 2012103112705 A CN2012103112705 A CN 2012103112705A CN 201210311270 A CN201210311270 A CN 201210311270A CN 102815841 A CN102815841 A CN 102815841A
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Abstract
The invention discloses a reconstruction process of nitrogen and phosphorus removing by two-stage bio-contact oxidation. The reconstruction process of nitrogen and phosphorus removing of two-stage bio-contact oxidation includes: residual sludge backflows to a hydrolytic acidification pond for decomposition to be a nitration carbon source, a regulating reservoir is added to regulate water quality and water content, and chemical phosphorus removing is performed before a biological treatment process so as to avoid circulation of phosphate precipitation in the biological treatment process along with sludge by a chemical phosphorus removing and hydrolytic acidification-oxygen deficit-aerobic process reconstructed by an anaerobic-aerobic two-stage bio-contact oxidation process. The reconstruction process has a function of nitrogen and phosphorus removing, and effluent of the process is guaranteed to meet primary standard B of the discharge standard of pollutants for municipal wastewater treatment plant. Treatment amount of sludge is reduced, the problem of insufficiency of water inlet carbon sources is basically solved, and sludge treatment and disposing costs are economized. The water quality and water content are regulated effectively, and accordingly stable implementation of the process is guaranteed. Phosphate is prevented from circulating in a biological treatment system by hydrolytic acidification of residual sludge and sludge backflow.
Description
Technical field
The present invention relates to a kind of existing anaerobic-aerobic two stage biological contact oxidation technology of sewage work and structures thereof, excess sludge of making full use of, be transformed into chemical dephosphorization+acidication-anoxic-aerobic process to the original two stage biological treatment process of sewage work with denitrogenation dephosphorizing ability.
Background technology
Body eutrophication is serious, a global day by day water environmental problems.Be the protection water surrounding; Guarantee drinking water safety, accelerate town sewage and handle and the regenerated using engineering construction, improve removal efficiency of nitrogen and phosphorus; Strengthen the reduction of discharging dynamics and become reinforcement conservation culture construction in the current and following long period of China, the important behave of constructing environment security system.In recent years; Ecological province, ecological city, ecological county, graceful small towns, Eco village construction have been actively pushed forward in all parts of the country; Built great quantity of small decentralized type sewage treatment plant within a short period of time rapidly, wherein some does not have the denitrogenation dephosphorizing function, like anaerobic-aerobic two stage biological contact oxidation technology etc.; Simultaneously; Because a large amount of private residences that China cities and towns at county level were built in the eighties of last century later stage generally all have the secondary septic tank, cause that the entering organic matter of water concentration that gets into urban wastewater treatment firm is low, ammonia nitrogen concentration is high, the denitrifying carbon source famine; The cities and towns network of drains is unsound, is mostly combined system, mixed flow system draining system, comes the water water quality and quantity seriously uneven.Therefore; The sewage work of these no denitrogenation dephosphorizing functions of upgrading guarantees sewage work's steady running, improves removal efficiency of nitrogen and phosphorus and effluent quality compliance rate; For accomplishing the energy-saving and emission-reduction task, advance town environment to pollute the comprehensive regulation and have important practical significance.
Summary of the invention
The objective of the invention is for overcoming the deficiency of prior art, and a kind of reforming technology that makes two stage biological catalytic oxidation denitrogenation dephosphorizing is provided, this technology can make the sewage work of no denitrogenation dephosphorizing function realize that nitrogen phosphorus reduces discharging steady running.
The technical scheme that realizes the object of the invention is:
A kind of reforming technology that makes two stage biological catalytic oxidation denitrogenation dephosphorizing; It is the chemical dephosphorization+acidication-anoxic-aerobic process that utilizes anaerobic-aerobic two stage biological contact oxidation technology to be transformed into; Do denitrifying carbon source to the decomposition of residual sludge reflux to hydrolysis acidification pool; Increase equalizing tank and regulate water quality and quantity, and before biological treatment chemical dephosphorization, with avoid the calcium phosphate precipitation thing in biological treatment with a kind of denitrification and dephosphorization method of mud round-robin.Its step comprises:
(1) transform anaerobic-aerobic two stage biological catalytic oxidation as chemical dephosphorization+acidication-anoxic-aerobic process;
(2) between settling pit and equalizing tank, set up equalizing tank, regulate water quality and quantity;
(3) anaerobic pond with original sewage work is transformed into hydrolysis acidification pool and anoxic pond, and wherein: hydrolysis acidification pool is used for the excess sludge hydrolysis, with as the anoxic pond denitrifying carbon source; Anoxic pond is used for denitrification denitrogenation;
(4) excess sludge that produces acidication-anoxic-aerobic process is as the anoxic pond denitrifying carbon source;
(5) before sewage treatment plant inflow mouth to settling pit, add chemical dephosphorization agent, and at settling pit and equalizing tank precipitation of phosphorus hydrochlorate throw out.
Described hydrolysis acidification pool, anoxic pond and Aerobic Pond adopt biomembrance process or activated sludge process, wherein for 10000m
3The small-sized urban wastewater treatment firm plan of the following scale of/d is advisable for biomembrance process.
Said excess sludge is the biological metabolic product that acidication-anoxic-aerobic process forms.
Said equalizing tank is the water quality and quantity setting device that increases before acidication-anoxic-aerobic process, and hydraulic detention time is controlled at 4～8h.
Said chemical dephosphorization agent is meant commercially available aluminium salt, molysite, i.e. Tai-Ace S 150, ferric sulfate, ferrous sulfate, aluminum chloride, iron(ic)chloride, Poly aluminum Chloride (PAC), poly-ferric chloride, polyaluminium sulfate.
The invention has the advantages that:
(1) makes full use of original anaerobic-aerobic two stage biological contact oxidation technology and structures thereof, equipment; Make it to be transformed into chemical dephosphorization+acidication-anoxic-aerobic process; Have the denitrogenation dephosphorizing function, guarantee that the technology water outlet reaches urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level B standard.
(2) the denitrifying carbon source of the excess sludge of acidication-anoxic-aerobic process generation as technology, significantly reduced the treatment capacity of mud, solved the not enough problem of water-inlet carbon source basically, the treatment and disposal expense of having saved mud.
(3) reforming technology has increased equalizing tank, be beneficial to adopt combined drainage system, cities and towns scale too small, come serious uneven small-sized, the miniature sewage work of water water quality and quantity that influent quality, the water yield are effectively regulated, guarantee the process stabilizing operation.
(4) chemical dephosphorization is analysed dephosphorization before adopting, and promptly before sewage treatment plant inflow mouth to settling pit, adds chemical dephosphorization agent, and the calcium phosphate precipitation thing is separated out at settling pit and equalizing tank.Avoiding phosphoric acid salt to pass through excess sludge acidication and mud refluxes and in biological treatment system, circulates.
(5) acidication-anoxic-aerobic process can adopt biomembrane process; Promptly add combined stuffing, be beneficial to the steady running and the daily administration of the small-sized urban wastewater treatment firm that temperature is big than lowland area (like the mountain area), impact load, the technician lacks at biological tank.
Description of drawings
Fig. 1 is a process flow sheet of the present invention.
Embodiment
are done further elaboration below in conjunction with accompanying drawing and embodiment to the present invention.
Embodiment 1:
The small city, Guizhou, 14～16 ℃ of average temperatures of the whole year do not have industrial enterprise basically in the city, and the part building is provided with the secondary septic tank, adopts combined drainage system, and sewage work comes water water yield 5000m
3/ d, the water yield changes variation factor more than 2, and variation water quality is big, water inlet BOD
5Generally at 65～120mg/L, ammonia nitrogen 40～55mg/L, total phosphorus 5～9 mg/L, the carbon N/P ratio is seriously lacked of proper care, and WWT is an anaerobic-aerobic two stage biological contact oxidation technology, and treat effluent nitrogen phosphorus exceeds standard.For realizing that environment reduces discharging target, must carry out sewage work and transform.
Seeing that this sewage work's operation and management level is lower, come the serious inequality of water water quality and quantity, denitrifying carbon source to lack, need the dephosphorization of carbon nitrogen; Technological transformation is carried out the biological denitrification denitrogenation except need fully rationally utilize original structures and equipment thereof; Problems such as also need considering water quality and quantity adjusting, chemical dephosphorization, add the biological denitrification carbon source, managerial personnel's level is low has increased equalizing tank so sewage work transforms, and makes original anaerobic pond into hydrolysis acidification pool and anoxic pond; Add dephosphorization agent at water-in; Become the biological denitrification carbon source to the excess sludge acidication, and filled combined stuffing, improved aeration intensity at hydrolysis acidification pool, anoxic pond and Aerobic Pond; Formed the technology of chemical dephosphorization+acidication-anaerobic-aerobic, i.e. embrane method A
2/ O technology (last figure is seen in concrete technical process).
After sewage work transforms and accomplishes; Through sludge acclimatization, extension film and process debugging; Effluent quality has reached urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level B standard, and the running cost of handling about 0.05 yuan of every cubic metre of sewage medicine consumption, every cubic metre of sewage of processing generally is no more than 0.65 yuan.Accomplished this county nitrogen, phosphorus reduction of discharging target, protected local water surrounding, realized that environmental benefit, economic benefit and social benefit are unified.
Embodiment 2:
A certain cities and towns, Guangxi, 15～17 ℃ of average temperatures of the whole year, rare industrial enterprise in the cities and towns, the part building is provided with the secondary septic tank, adopts combined drainage system, and sewage work comes the nearly 10000m of the water water yield
3/ d, water yield variation factor is more than 2, and variation water quality is big, water inlet BOD
5Generally at 70～145mg/L, ammonia nitrogen 35～55mg/L, total phosphorus 4～9 mg/L, the carbon N/P ratio is seriously lacked of proper care, and WWT is an anaerobic-aerobic two stage biological contact oxidation technology, and treat effluent nitrogen phosphorus exceeds standard.For realizing that local environment reduces discharging target, need carry out sewage work and transform.
Because this county economic condition is relatively poor; Sewage work's operation and management level is lower, seriously inequality, denitrifying carbon source lack, need the dephosphorization of carbon nitrogen to come the water water quality and quantity; Technological transformation is carried out the biological denitrification denitrogenation except need fully rationally utilize original structures and equipment thereof; Problems such as also need considering water quality and quantity adjusting, chemical dephosphorization, add the biological denitrification carbon source, managerial personnel's level is low has increased equalizing tank so sewage work transforms, and makes original anaerobic pond into hydrolysis acidification pool and anoxic pond; Promote pumping plant at water-in and add dephosphorization agent; Become the biological denitrification carbon source to the excess sludge acidication, formed the technology of chemical dephosphorization+acidication-anaerobic-aerobic, i.e. A
2/ O technology (last figure is seen in concrete technical process), but hydrolysis acidification pool, anoxic pond and Aerobic Pond are not filled combined stuffing.
After original sewage work transforms and accomplishes; Through sludge acclimatization and process debugging; Effluent quality has reached urban wastewater treatment firm pollutant emission standard (GB18918-2002) one-level B standard, handles about 0.05 yuan of every cubic metre of sewage medicine consumption, handles about 0.63 yuan of the running cost of every cubic metre of sewage.Accomplished this county nitrogen, phosphorus reduction of discharging target, protected local water surrounding, realized that environmental benefit, economic benefit and social benefit are unified.
Claims (7)
1. reforming technology that makes two stage biological catalytic oxidation denitrogenation dephosphorizing; It is characterized in that: it is the chemical dephosphorization+acidication-anoxic-aerobic process that utilizes anaerobic-aerobic two stage biological contact oxidation technology to be transformed into; Do denitrifying carbon source to the decomposition of residual sludge reflux to hydrolysis acidification pool; Increase equalizing tank and regulate water quality and quantity, and before biological treatment chemical dephosphorization, with avoid the calcium phosphate precipitation thing in biological treatment with a kind of denitrification and dephosphorization method of mud round-robin; Its step comprises:
(1) transform anaerobic-aerobic two stage biological catalytic oxidation as chemical dephosphorization+acidication-anoxic-aerobic process, Aerobic Pond is used for organic degradation and ammonia nitrogen is nitrated;
(2) between settling pit and equalizing tank, set up equalizing tank, regulate water quality and quantity;
(3) anaerobic pond with original sewage work is transformed into hydrolysis acidification pool and anoxic pond;
(4) excess sludge that produces acidication-anoxic-aerobic process is as the anoxic pond denitrifying carbon source;
(5) before sewage treatment plant inflow mouth to settling pit, add chemical dephosphorization agent, and at settling pit and equalizing tank precipitation of phosphorus hydrochlorate throw out.
2. technology according to claim 1 is characterized in that: said hydrolysis acidification pool is used for the excess sludge hydrolysis, with as the anoxic pond denitrifying carbon source.
3. technology according to claim 1 is characterized in that: said anoxic pond is used for denitrification denitrogenation.
4. technology according to claim 1 is characterized in that: described hydrolysis acidification pool, anoxic pond and Aerobic Pond adopt biomembrance process or activated sludge process.
5. technology according to claim 1 is characterized in that: said excess sludge is the biological metabolic product that acidication-anoxic-aerobic process forms.
6. technology according to claim 1 is characterized in that: said equalizing tank is the water quality and quantity setting device that increases before acidication-anoxic-aerobic process, and hydraulic detention time is controlled at 4～8h.
7. technology according to claim 1 is characterized in that: said chemical dephosphorization agent is meant aluminium salt, molysite, i.e. Tai-Ace S 150, ferric sulfate, ferrous sulfate, aluminum chloride, iron(ic)chloride, Poly aluminum Chloride (PAC), poly-ferric chloride, polyaluminium sulfate.
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739164A (en) * | 2014-01-08 | 2014-04-23 | 嘉园环保股份有限公司 | Dissolved oxygen optimized distribution denitrifying process |
| CN104609556A (en) * | 2015-01-28 | 2015-05-13 | 浦华环保有限公司 | Condensed hydrolysis reinforced AAO biological nitrogen and phosphorus removal system and application thereof |
| CN104891754A (en) * | 2015-07-09 | 2015-09-09 | 王洪臣 | Wastewater treatment process and wastewater treatment system |
| CN104926031A (en) * | 2015-05-28 | 2015-09-23 | 重庆大学 | Method for reducing content of total phosphorus in wastewater |
| CN105176799A (en) * | 2015-10-21 | 2015-12-23 | 轻工业环境保护研究所 | Liquid phase anaerobic fermentation fermenting system for solid organic mass |
| CN105366811A (en) * | 2015-12-09 | 2016-03-02 | 浦华环保股份有限公司 | Sewage treatment plant sludge treatment system, and treatment method thereof |
| CN106007224A (en) * | 2016-07-14 | 2016-10-12 | 胡大苇 | Denitrifying and dephosphorizing composite device and denitrifying and dephosphorizing method thereof |
| CN106946355A (en) * | 2017-05-23 | 2017-07-14 | 上海明奥环保科技有限公司 | A kind of jet-flow aeration formula A/O integrated sewage treating apparatus and its sewage treatment process |
| CN107500472A (en) * | 2017-09-05 | 2017-12-22 | 成都锐达机电实业有限公司 | High efficiency dephosphorating technique |
| CN108314270A (en) * | 2018-04-04 | 2018-07-24 | 北京格朗德科技有限公司 | Sewage-treatment plant and method |
| CN109081509A (en) * | 2018-08-29 | 2018-12-25 | 戚汝常 | A kind of sewage disposal system and technique suitable for low, high carbon-nitrogen ratio |
| CN109320028A (en) * | 2018-12-10 | 2019-02-12 | 重庆固润科技发展有限公司 | The system and method for kitchen garbage and sanitary sewage integration in-situ treatment |
| CN111547938A (en) * | 2020-05-09 | 2020-08-18 | 四川省生态环境科学研究院 | Electrochemical dephosphorization treatment process for wastewater |
| CN112661357A (en) * | 2020-12-24 | 2021-04-16 | 江苏泰源环保科技股份有限公司 | Steel modular municipal sewage emergency treatment process |
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Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103739164B (en) * | 2014-01-08 | 2015-08-12 | 嘉园环保有限公司 | Dissolved oxygen Optimum distribution denitrification process |
| CN103739164A (en) * | 2014-01-08 | 2014-04-23 | 嘉园环保股份有限公司 | Dissolved oxygen optimized distribution denitrifying process |
| CN104609556A (en) * | 2015-01-28 | 2015-05-13 | 浦华环保有限公司 | Condensed hydrolysis reinforced AAO biological nitrogen and phosphorus removal system and application thereof |
| CN104926031B (en) * | 2015-05-28 | 2018-02-09 | 重庆大学 | A kind of method of total phosphorus content in reduction sewage |
| CN104926031A (en) * | 2015-05-28 | 2015-09-23 | 重庆大学 | Method for reducing content of total phosphorus in wastewater |
| CN104891754A (en) * | 2015-07-09 | 2015-09-09 | 王洪臣 | Wastewater treatment process and wastewater treatment system |
| CN105176799A (en) * | 2015-10-21 | 2015-12-23 | 轻工业环境保护研究所 | Liquid phase anaerobic fermentation fermenting system for solid organic mass |
| CN105366811A (en) * | 2015-12-09 | 2016-03-02 | 浦华环保股份有限公司 | Sewage treatment plant sludge treatment system, and treatment method thereof |
| CN106007224A (en) * | 2016-07-14 | 2016-10-12 | 胡大苇 | Denitrifying and dephosphorizing composite device and denitrifying and dephosphorizing method thereof |
| CN106007224B (en) * | 2016-07-14 | 2019-10-18 | 胡大苇 | A kind of denitrogenation dephosphorizing set composite and its denitrification and dephosphorization method |
| CN106946355A (en) * | 2017-05-23 | 2017-07-14 | 上海明奥环保科技有限公司 | A kind of jet-flow aeration formula A/O integrated sewage treating apparatus and its sewage treatment process |
| CN107500472A (en) * | 2017-09-05 | 2017-12-22 | 成都锐达机电实业有限公司 | High efficiency dephosphorating technique |
| CN108314270A (en) * | 2018-04-04 | 2018-07-24 | 北京格朗德科技有限公司 | Sewage-treatment plant and method |
| CN109081509A (en) * | 2018-08-29 | 2018-12-25 | 戚汝常 | A kind of sewage disposal system and technique suitable for low, high carbon-nitrogen ratio |
| CN109081509B (en) * | 2018-08-29 | 2021-06-25 | 戚汝常 | Sewage treatment system and process suitable for low-carbon-nitrogen ratio and high-carbon-nitrogen ratio |
| CN109320028A (en) * | 2018-12-10 | 2019-02-12 | 重庆固润科技发展有限公司 | The system and method for kitchen garbage and sanitary sewage integration in-situ treatment |
| CN111547938A (en) * | 2020-05-09 | 2020-08-18 | 四川省生态环境科学研究院 | Electrochemical dephosphorization treatment process for wastewater |
| CN112661357A (en) * | 2020-12-24 | 2021-04-16 | 江苏泰源环保科技股份有限公司 | Steel modular municipal sewage emergency treatment process |
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