CN101264998A - Low carbon source urban sewage strengthening denitrogenation dephosphorization technique and device - Google Patents
Low carbon source urban sewage strengthening denitrogenation dephosphorization technique and device Download PDFInfo
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- CN101264998A CN101264998A CNA2008100153586A CN200810015358A CN101264998A CN 101264998 A CN101264998 A CN 101264998A CN A2008100153586 A CNA2008100153586 A CN A2008100153586A CN 200810015358 A CN200810015358 A CN 200810015358A CN 101264998 A CN101264998 A CN 101264998A
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Abstract
The invention provides an enhanced low-carbon source urban sewage denitrogenation and phosphorous removal process, and a biological-chemical combined sewage treatment device for realizing the process. The enhanced denitrogenation and phosphorous removal process comprises the steps of adding suspended filler in a biochemical reaction tank to increase microbial biomass, and at the same time adding phosphorous removal chemical agent at the end of the biochemical reaction tank. The biological-chemical combined sewage treatment device comprises a biochemical reaction tank and a chemical agent adding device, wherein the biochemical reaction tank is partitioned into an anoxic tank, an anaerobic tank and an aerobic tank that are connected in series; the anoxic tank and the anaerobic tank are respectively provided with a stirring paddle , and a water inlet pipe and a sludge return pipe are arranged at the side face of the anoxic tank; the aerobic tank is filled with 25-35% (v/v) suspended filler of the volume of the aerobic tank, an aeration pipe connected with an air inlet pipe is arranged at the bottom of the aerobic tank, and a water outlet pipe is arranged in the upper part of the aerobic tank; and the chemical agent adding device comprises a chemical agent tank, a metering pump and a chemical agent adding pipe that are sequentially connected, and the chemical agent adding pipe is connected with the aerobic tank.
Description
Technical field
The present invention relates to a kind of chemical/biological coupling denitrogenation dephosphorizing treatment process and device that low carbon source urban sewage is handled that be used for, belong to the urban sewage treatment technology field.
Background technology
Entrained nitrogen, the phosphorus of municipal effluent enters the eutrophication that can cause lake, river and ocean environment behind the water body, causes big area red tide or wawter bloom to take place frequently.For preventing nitrogen, the phosphorus eutrophication problem to receiving water body, at present, sewage water dephosphorization denitrification technology mainly is divided into biological process and chemical method two big classes.Compare with the chemical method denitrogenation dephosphorizing, biological denitrification phosphorous removal technique is the focus that Recent study and engineering are used.
Have in the urban sewage treatment system of biological carbon and phosphorous removal function in design, because biological denitrification process needs long sludge age, and the biological phosphate-eliminating ability reduces along with the prolongation in mud age; Simultaneously, biological denitrificaion and dephosphorization process exist the contradictory problems of carbon source competition, and under the situation of water-inlet carbon source relative deficiency, treatment system is difficult to satisfy simultaneously biological denitrificaion and biological phosphate-eliminating usually to the demand of carbon source, often causes system's dephosphorization efficiency by using low.In addition, in the excess sludge treating processes of sewage work, carry a large amount of phosphoric acid salt in the supernatant liquor of backflow, increased the phosphoric acid salt load of Biological Phosphorus Removal System, this has more aggravated the insufficient contradiction of carbon source, causes the water outlet phosphate concn to exceed standard.In order to address these problems, at present, some urban sewage treatment process begin to adopt the auxiliary dephosphorization technique of chemistry.
The mud of the auxiliary dephosphorization treatment system of existing chemistry is longer age, hydraulic detention time long (Chi Rongda).For realizing good biological phosphor-removing effect, the chemical agent dosage is big, and dosage is excessive, can cause the harmful circulation of potential to biological phosphate-eliminating: excessive adding → gather phosphorus absorbed dose minimizings → polyP bacteria amount minimizing → biological phosphate-eliminating amount minimizing → needs increasing dosage → polyP bacteria amount minimizing → ...Cause system biological dephosphorization Disability, added amount of chemical increases, the problem that running cost improves, floor space is big, working cost is high.
Summary of the invention
The present invention is directed to the problem that exists in the existing low carbon source urban sewage treating processes, provide biology/chemical group that a kind of floor space is little, running cost is low box-like low carbon source urban sewage strengthening denitrogenation dephosphorization technique, a kind of biological-chemical combined sewage water treatment unit of realizing this technology is provided simultaneously.
Low carbon source urban sewage strengthening denitrogenation dephosphorization technique of the present invention is to add floating stuffing in the biochemical reaction tank of disposing of sewage, to increase microbial biomass; Simultaneously add the dephosphorization chemical agent at the biochemical reaction tank end.
Floating stuffing is the aerobic reactor zone that adds in biochemical reaction tank, and the floating stuffing dosage accounts for aerobic reactor zone volumetrical 25%--35%.
The biological-chemical combined sewage water treatment unit of realization low carbon source urban sewage strengthening denitrogenation dephosphorization technique of the present invention comprises biochemical reaction tank, and biochemical reaction tank is separated into anoxic pond, anaerobic pond and three placed in-line reaction zones of Aerobic Pond by dividing plate; Be provided with stirring rake in anoxic pond and the anaerobic pond, the anoxic pond side is provided with water inlet pipe and mud return line, and the Aerobic Pond bottom is provided with the aeration tube that links to each other with inlet pipe, and top is provided with rising pipe; Add the floating stuffing that accounts for its volumetric ratio 25-35% in the Aerobic Pond, also comprise chemical chemicals dosing plant, chemical chemicals dosing plant is made up of the pharmacy jar, volume pump and the chemical feed pipe that connect successively, and chemical feed pipe is connected with Aerobic Pond.
In Aerobic Pond, add volumetric ratio and be about 30% not susceptible to plugging floating stuffing, can increase the microbial biomass of Aerobic Pond, make the microorganism of existing suspension growth in the Aerobic Pond, the microorganism of fixed growth is arranged again.Because microbial biomass increases, it just can realize good nitrification effect in the short period of time.On the other hand, since the nitrifier in the Aerobic Pond can fixed growth on filler, the auxiliary dephosphorization process of chemistry reduces mud age (strengthening the excess sludge discharge amount) and also can not cause nitrobacteria to run off, this novel process still can realize good nitrification effect at shorter mud during age, therefore, the present invention can be under the condition of keeping the good biological denitrification effect, reduces mud age, improves the biological phosphate-eliminating ability.Add chemical cooperated dephosphorization medicament at the Aerobic Pond end, further improve the dephosphorization ability of system.The auxiliary dephosphorization process of traditional chemical be designed to realize good biological nitration effect, generally all keep longer mud age, its design hydraulic detention time is generally all longer.
The present invention has added floating stuffing in Aerobic Pond, not only improved nitrification effect, and can improve the biological phosphate-eliminating ability age by reducing mud, therefore can reduce the chemical agent dosage, reduces running cost.Simultaneously add chemical agent at biology aerobic pond end, need not to build in addition medicament reaction tank and settling tank, the removal that relies on chemical agent further to improve phosphorus makes water outlet phosphorus can reach emission request, solves the defective of low carbon source urban sewage treating processes dephosphorization scarce capacity.
Description of drawings
Fig. 1 is a biological-chemical combined sewage water treatment unit synoptic diagram of the present invention.
Fig. 2 is a low carbon source urban sewage strengthening denitrogenation dephosphorization technique schematic flow sheet of the present invention.
Among the figure: 1, anoxic pond, 2, anaerobic pond, 3, Aerobic Pond, 4, the PVC water inlet pipe, 5, the PVC mud return line, 6, dividing plate, 7, stirring rake, 8, boring aeration pipe, 9, inlet pipe, 10, floating stuffing, 11, PVC rising pipe, 12, pharmacy jar, 13, the Mi Dunluo volume pump, 14, chemical feed pipe.
Embodiment
As shown in Figure 1, the present invention realizes that the biological-chemical combined sewage water treatment unit of low carbon source urban sewage strengthening denitrogenation dephosphorization comprises biochemical reaction tank and chemical chemicals dosing plant.Biochemical reaction tank is welded by the PVC plate, is divided into anoxic pond 1, anaerobic pond 2 and 3 three placed in-line zones of Aerobic Pond by dividing plate 6.Be provided with stirring rake 7 in anoxic pond 1 and the anaerobic pond 2, play the effect of mixing.The side of anoxic pond 1 is provided with water inlet pipe 4 and the mud return line 5 that PVC makes.Added giantreed charcoal floating stuffing 10 in the Aerobic Pond 3, spherical suspending filling material 10 accounts for Aerobic Pond 3 volumetrical 25-30%, and its diameter is 25mm.Increasing the microbe population in the Aerobic Pond 3, nitrifier can fixed growth on filler 10, accelerate organic pollutant degraded and nitrification effect, thereby reduce the reaction tank volume of Aerobic Pond 3.The bottom of Aerobic Pond 3 is provided with the ceramic boring aeration pipe 8 that the inlet pipe 9 made with PVC links to each other, and top is provided with the rising pipe 11 that PVC makes.Pressurized air is dispersed into tiny bubble behind ceramic boring aeration pipe 8, play aeration aerating, mix effect.The chemistry chemicals dosing plant is made up of the pharmacy jar 12, Mi Dunluo volume pump 13 and the chemical feed pipe 14 that connect successively, and medicament is added to Aerobic Pond 3 by chemical feed pipe 14.
The present invention utilizes said apparatus to carry out low carbon source urban sewage strengthening denitrogenation dephosphorization, and technical process as shown in Figure 2.Municipal effluent promotes after PVC water inlet pipe 4 enters anoxic pond 1 after suspended substance and sand grains are removed in pre-treatment, and returned sluge promotes from second pond and enters anoxic pond 1 through PVC mud return line 5.Returned sluge carries out denitrification denitrogenation with after sewage mixes in anoxic pond 1.Afterwards, enter anaerobic pond 2 and carry out anaerobic phosphorus release.Subsequently, enter Aerobic Pond 3 and carry out aerobic suction phosphorus, nitrated, oxidation operation.The chemical dephosphorization medicament from pharmacy jar 12 after Mi Dunluo volume pump 13 metering promotes, add end at Aerobic Pond 3, further remain in the phosphorus in the liquid phase behind the biological suction of the removal phosphorus, make the water outlet phosphorus concentration reach emission request, afterwards, mixed solution enters second pond and carries out solid-liquid separation, sterilization back qualified discharge.Pressurized air is dispersed into tiny bubble by inlet pipe 9 behind ceramic boring aeration pipe 8, carry out aeration agitation.Aerobic Pond 3 upper ends PVC rising pipe 11 be connected with second pond.
Embodiment 1
Adopt biology of the present invention--the chemical association sewage disposal testing apparatus factory's sewage of disposing of sewage, treatment scale is 2.6 cubic metres/day, Sewage Plant settling pit effluent quality condition is: water inlet CODcr:125～373mg/L, TP (total phosphorus): 4.52～7.11mg/L, TN (total nitrogen): 45～70mg/L.Adopt strengthening denitrogenation dephosphorization technique of the present invention sludge age 5 days, aerobic zone hydraulic detention time 4 hours, return sludge ratio 200%, Fe (the dephosphorization chemical agent adopts FeCl3): the P mol ratio is under 0.8: 1 operational conditions, water outlet CODcr:29～53mg/L, TP:0.51～0.74mg/L, TN:14～19mg/L reaches country's " urban wastewater treatment firm pollutant emission standard " one-level B emission standard.And to reach identical nitrogen, phosphorus removal effect, and the Fe of the auxiliary dephosphorization process of general chemistry: P is generally at 1.5: 1, and design aerobic zone hydraulic detention time is more than 8 hours.
Adopting biology of the present invention--chemical association sewage disposal testing apparatus is handled the sanitary sewage of student dormitory, 2.6 cubic metres/day of treatment scales, at sanitary sewage water inlet CODcr:144～305mg/L, TP:3.18～5.52mg/L, under the condition of water quality of TN:30～56mg/L, adopt strengthening denitrogenation dephosphorization technique of the present invention sludge age 5 days, aerobic zone hydraulic detention time 4 hours, return sludge ratio 200%, Fe (dephosphorization chemical agent adopt FeCl3): under 1.1: 1 operational conditionss of P mol ratio, water outlet CODcr:20～47mg/L, TP:0.38～0.64mg/L, TN:15～20mg/L reaches country's " urban wastewater treatment firm pollutant emission standard " one-level B emission standard.
Adopt biology of the present invention--chemical association sewage disposal testing apparatus Treating Municipal Sewage, treatment scale is 2.6 cubic metres/day, at municipal effluent water inlet CODcr:164～275mg/L, TP:2.18-6.25mg/L, under the condition of water quality of TN:40～68mg/L, adopt strengthening denitrogenation dephosphorization technique of the present invention sludge age 5 days, aerobic zone hydraulic detention time 4 hours, return sludge ratio 200%, Fe (dephosphorization chemical agent adopt FeCl3): under 1.04: 1 operational conditionss of P mol ratio, water outlet CODcr:25～45mg/L, TP:0.43-0.77mg/L, TN:10～17mg/L reaches country's " urban wastewater treatment firm pollutant emission standard " one-level B emission standard.
Claims (3)
1. a low carbon source urban sewage strengthening denitrogenation dephosphorization technique is characterized in that: add floating stuffing in the biochemical reaction tank of disposing of sewage, to increase microbial biomass; Simultaneously add the dephosphorization chemical agent at the biochemical reaction tank end.
2. low carbon source urban sewage strengthening denitrogenation dephosphorization technique according to claim 1 is characterized in that: floating stuffing is the aerobic reactor zone that adds in biochemical reaction tank, and the floating stuffing dosage accounts for aerobic reactor zone volumetrical 25%--35%.
3. biological-chemical combined sewage water treatment unit of realizing the described low carbon source urban sewage strengthening denitrogenation dephosphorization technique of claim 1, comprise biochemical reaction tank, biochemical reaction tank is separated into anoxic pond, anaerobic pond and three placed in-line reaction zones of Aerobic Pond by dividing plate; Be provided with stirring rake in anoxic pond and the anaerobic pond, the anoxic pond side is provided with water inlet pipe and mud return line, and the Aerobic Pond bottom is provided with the aeration tube that links to each other with inlet pipe, and top is provided with rising pipe; It is characterized in that: add the floating stuffing that accounts for its volumetric ratio 25-35% in the Aerobic Pond, also comprise chemical chemicals dosing plant, chemical chemicals dosing plant is made up of the pharmacy jar, volume pump and the chemical feed pipe that connect successively, and chemical feed pipe is connected with Aerobic Pond.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017005154A1 (en) * | 2015-07-07 | 2017-01-12 | 洪胜男 | High-efficiency wastewater denitrification and dephosphorization process and system |
| CN107265772A (en) * | 2017-07-24 | 2017-10-20 | 华南农业大学 | A kind of biochemical ecological treatment system of the Pig raising wastewater of power self-support and method |
| CN108218118A (en) * | 2018-01-08 | 2018-06-29 | 浙江利欧环境科技有限公司 | A kind of city domestic sewage MBBR+MBR biological carbon and phosphorous removals device and denitrification and dephosphorization method |
| CN108862943A (en) * | 2018-09-11 | 2018-11-23 | 尚川（北京）水务有限公司 | A kind of adjustable biomembrane-activated sludge sewage water treatment method and device |
| CN108911405A (en) * | 2018-07-26 | 2018-11-30 | 华电水务控股股份有限公司 | A kind of biochemical cell system and technique using five sections of bioanalysis |
| CN110255820A (en) * | 2019-06-26 | 2019-09-20 | 安徽建筑大学 | A kind of low-carbon-source bio-denitrifying sewage system and method using pulling flow type anoxic pond |
-
2008
- 2008-04-28 CN CNA2008100153586A patent/CN101264998A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017005154A1 (en) * | 2015-07-07 | 2017-01-12 | 洪胜男 | High-efficiency wastewater denitrification and dephosphorization process and system |
| CN107265772A (en) * | 2017-07-24 | 2017-10-20 | 华南农业大学 | A kind of biochemical ecological treatment system of the Pig raising wastewater of power self-support and method |
| CN108218118A (en) * | 2018-01-08 | 2018-06-29 | 浙江利欧环境科技有限公司 | A kind of city domestic sewage MBBR+MBR biological carbon and phosphorous removals device and denitrification and dephosphorization method |
| CN108911405A (en) * | 2018-07-26 | 2018-11-30 | 华电水务控股股份有限公司 | A kind of biochemical cell system and technique using five sections of bioanalysis |
| CN108862943A (en) * | 2018-09-11 | 2018-11-23 | 尚川（北京）水务有限公司 | A kind of adjustable biomembrane-activated sludge sewage water treatment method and device |
| CN108862943B (en) * | 2018-09-11 | 2023-07-28 | 尚川（北京）水务有限公司 | Adjustable biomembrane-activated sludge sewage treatment method and device |
| CN110255820A (en) * | 2019-06-26 | 2019-09-20 | 安徽建筑大学 | A kind of low-carbon-source bio-denitrifying sewage system and method using pulling flow type anoxic pond |
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Open date: 20080917 |