CN1607188A - ADSEF dephosphorizing-denitrification sewage treatment technique - Google Patents
ADSEF dephosphorizing-denitrification sewage treatment technique Download PDFInfo
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- CN1607188A CN1607188A CNA2003101053154A CN200310105315A CN1607188A CN 1607188 A CN1607188 A CN 1607188A CN A2003101053154 A CNA2003101053154 A CN A2003101053154A CN 200310105315 A CN200310105315 A CN 200310105315A CN 1607188 A CN1607188 A CN 1607188A
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- phosphorus
- denitrification
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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
Abstract
A process for treating urban sewage and other sewage degradative by biochemical method, especially a process for removing phosphorus and nitrogen pollutants, which contains anacrobic phosphorus releasing, denitrify polymerizing phosphorus, low oxygen synchronous nitration/de nitration and phosphorus absorbing, quick mud water separation in depositing tank, active mud back flow, aeration biological filter pool nitration, NO#-[3]#+[-] contained water back flow, residual mud discharge etc.
Description
The present invention relates to a kind of Treating Municipal Sewage or other sewage that can adopt biochemical method to degrade, and remove the technology of phosphor in sewage (P) and nitrogen (N) pollutent emphatically.
Sewage for available biological dephosphorize denitrification method degraded phosphorus, polluted by nitrogen carries out biochemical treatment, can adopt A
2/ O method treatment process.Existing technology generally by 1. anaerobic phosphorus release, 2. anoxic denitrification, 3. aerobic nitrification and inhale phosphorus, 4. mixed-liquor return, 5. the settling tank mud-water separation, 6. activity sludge reflux, 7. process procedure such as rich phosphorus excess sludge discharge constitutes, as shown in Figure 1.
Principle of work is: cultivate breeding a large amount of microorganisms (sewage treatment industry claims active sludge) in the system, active sludge is made up of polyP bacteria, nitrococcus, nitrifier, denitrifying bacteria and other microorganism and small amounts of inorganic thing.Contain nitrogen, phosphorus and organic sewage through conventional pre-treatment enter anaerobic phosphorus release 1. process section with from the settling tank mud-water separation 5. the returned sluge of process section mix, polyP bacteria under anaerobic decomposes intravital polyphosphoric acid salt and produces ATP, the lower fatty acid that utilizes ATP to absorb in the sewage synthesizes poly-(PHB) in cell, simultaneously to release in vitro PO
4 -3The mixed solution plug-flow to anoxic denitrification 2. process section with from aerobic nitrification and inhale phosphorus 3. the phegma of process section mix, denitrifying bacteria utilizes low molecule organic matter in the sewage as carbon source (electron donor), the NO that brings with phegma
3 -And NO
2 -Be electron acceptor(EA), oxidation of organic compounds, synthetic new cell, and make NO
3 -And NO
2 -Be reduced into N
2N
2Evaporate in the air, thereby reach the purpose of biological denitrificaion.Mixed solution continues plug-flow to aerobic nitrated and inhale 3. process section of phosphorus, under nitrococcus and nitrifier acting in conjunction, and the ammonia-state nitrogen (NH in the sewage
4-N) be oxidized to NO
2 -And NO
3 -, and partly be back to 2. process section of anoxic denitrification with phegma, carry out denitrification denitrogenation.The polyP bacteria of releasing phosphorus at the anaerobic phosphorus release process section decomposes intravital poly-, with external PO under aerobic condition
4 -3Absorb synthetic ATP and nucleic acid in the body, with the PO of surplus
4 -3Aggregate into the cell stock: polyphosphoric acid salt.Because polyP bacteria has excess to absorb PO
4 -3Characteristic, so PO in the sewage
4 -3In PO
4 -3Be transferred in the cell of polyP bacteria.Mixed solution continues plug-flow and enters 5. process section of settling tank mud-water separation, active sludge is deposited at the bottom of the pond and by the suction dredger sucking-off, a part is sent back to 1. process section of anaerobic phosphorus release as returned sluge, release phosphorus once more, another part is discharged into the sludge dewatering equipment dehydration as excess sludge, because polyP bacteria wherein is in rich phosphorus state, thereby realize biological phosphate-eliminating.Sewage up to standard by the settling tank mud-water separation 5. process section discharge treatment system.
This technical process exists following than significant disadvantages: the mud contradiction in age that 1, does not have nitrifier and polyP bacteria in the resolution system.Usually, the nitrifier generation cycle is longer, if make enrichment nitrifier in the system, will proper extension mud age; And dephosphorization requires constantly to discharge excess sludge, inhales the polyP bacteria of phosphorus by discharging excess, takes the phosphorus in the sewage out of system and realizes biological phosphate-eliminating, therefore also just needs relatively short mud age.In the middle of the practice, for reaching the purpose of dephosphorization denitrogenation simultaneously, can only be from seeking balance between the two.This has also just determined above-mentioned dephosphorization and denitrification process to have the indifferent of adaptation change of water quality, the weakness that operational conditions is comparatively harsh.2, do not solve the substrate competition contradiction of denitrifying bacteria and polyP bacteria in dephosphorization and the denitrification process.Usually, polyP bacteria and denitrifying bacteria all need the dissolved organic matter (RBCOD) of readily biodegradable, but this type of organic content and few in the municipal wastewater, thereby cause system's dephosphorization removing nitric efficiency to reduce.3, nitrification and denitrification fully separately carries out, and causes the structures volume to strengthen, and oxygen-consumption is higher, the ph value of mixture instability.4, be back in the returned sluge of anaerobism section by settling tank and contain more dissolved oxygen (DO) and NO
3 -, suppressed the phosphorus of releasing of polyP bacteria.。
The objective of the invention is to overcome the shortcoming of existing technology, a kind of dephosphorization denitrogenation sewage treatment process is provided, this technology can overcome the weakness of original technology, improves the dephosphorization denitrogenation rate, cuts down the consumption of energy, and saves running cost.
ADSEF dephosphorization denitrogenation sewage treatment process by 1. anaerobic phosphorus release, 2. denitrification phosphorus-collecting, 3. the hypoxemia synchronous nitration and denitrification and inhale phosphorus, 4. the rapid sedimentation tank mud-water separation, 5. activity sludge reflux, 6. BAF nitrated, 7. contain NO
3 -Water refluxes, 8. process procedure such as excess sludge discharge constitutes, as shown in Figure 2.
ADSEF dephosphorization denitrogenation sewage treatment process and former A
2/ O method treatment process is compared and is had the following advantages:
1, isolating dephosphorization and nitrification have overcome the mud contradiction in age in traditional dephosphorization and denitrification process.PolyP bacteria that this technology is required with dephosphorization and nitrated required nitrifier are placed in two relatively independent systems.The polyP bacteria in short mud age is in the Sludge System of suspended state, is convenient to discharging; The nitrifier in long mud age is in the biofilm system of set attitude, is convenient to enrichment.Dephosphorization and nitrated mud contradiction in age have so just been solved well.
2, utilize denitrification phosphorus-collecting to alleviate the insufficient contradiction of carbon source.Exist in the active sludge and can utilize NO
3 -In O carry out the denitrification phosphorus-collecting bacterium (DNPAO) of denitrification phosphorus-collecting.This technology is with NO
3 -Be back to the denitrification phosphorus-collecting process section, adopt the means of restriction aeration, force the denitrification phosphorus-collecting bacterium at first to utilize NO
3 -In O carry out metabolism, and induce the relative enrichment of denitrification phosphorus-collecting bacterium, effectively alleviated the insufficient contradiction of carbon source.
3, this technology utilization synchronous nitration and denitrification removes the most of the nitrogen in the sewage.Synchronous nitration and denitrification has can keep the stable of ph value of mixture, reduces or the omission mixed-liquor return, reduces aeration rate, advantages such as reduction structures volume.
4, the fast heavy pond of this process system usefulness has replaced the second pond in original treatment process.Because hydraulic detention time is shorter in the fast heavy pond, avoided polyP bacteria before activity sludge reflux and excess sludge discharge, slowly to release phosphorus because of what anaerobism produced, guaranteed the phosphor-removing effect of system.
5, because mixed solution was the synchronous nitration and denitrification process, do not have a large amount of NO in the mixed solution before entering fast heavy pond
3 -And NO
2 -Enrichment, dissolved oxygen (DO) content is also lower, therefore, NO in the returned sluge
3 -, NO
2 -And the content of dissolved oxygen (DO) is also lower, makes that polyP bacteria is fully released phosphorus in the anaerobic phosphorus release process section.
6, the BAF of this technology latter end has stronger capacity of resisting impact load, by simple automatic control adjustment, can realize residue organic pollutant and ammonia nitrogen (NH
4-N) degree of depth degraded.System-wide adaptability and capacity of resisting impact load have been improved.
7, system's major part is in the running status of anaerobism, anoxic and hypoxemia, has reduced aeration rate, has saved working cost.
2 couples of the present invention do further detailed description below in conjunction with accompanying drawing: raw waste water enters 1. process section of anaerobic phosphorus release through conventional pre-treatment, and from the 4. returned sluge thorough mixing of process section of fast heavy pond mud-water separation.At this interval anaerobic phosphorus release of realizing polyP bacteria, polyP bacteria also adsorbs a large amount of organic substrates simultaneously, and the dominant microflora that becomes in the active sludge for polyP bacteria provides the carbon source assurance.Mixed solution is through after fully releasing phosphorus, and plug-flow is to 2. process section of denitrification phosphorus-collecting, with the NO that contains from the nitrated 6. process section of BAF
3 -Internal reflux water mix, realize denitrification phosphorus-collecting.Mixed solution continuation plug-flow is to the hypoxemia synchronous nitration and denitrification and inhale 3. process section of phosphorus, carries out the poly-phosphorus of synchronous nitration and denitrification and hypoxemia.Mixed solution continues plug-flow to 4. rapid sedimentation tank mud-water separation process section and carries out mud-water separation, a part of activity sludge reflux to anaerobic phosphorus release 1. process section release phosphorus once more, the rich phosphorus excess sludge of another part drains into the sludge dewatering equipment dehydration, realizes biological phosphate-eliminating.Fast sinking pool effluent enters the nitrated 6. process section of BAF.Remain NH in the BAF
4 -Become NO by oxidation by nitrobacteria
3 -, the residue organic pollutant is degraded by the degree of depth, and suspended substance (SS) is held back by filtering layer.A part contains NO
3 -Sewage backflow to denitrification phosphorus-collecting 2. process section carry out denitrification denitrogenation.Sewage up to standard is discharged treatment system by the nitrated 6. process section of BAF.
Claims (2)
1, a kind of ADSEF dephosphorization denitrogenation sewage treatment process, by anaerobic phosphorus release, denitrification phosphorus-collecting, hypoxemia synchronous nitration and denitrification and inhale phosphorus, rapid sedimentation tank mud-water separation, activity sludge reflux, BAF nitrated, contain NO
3 -Process procedures such as water backflow, excess sludge discharge constitute.Its characteristics are that raw waste water enters the anaerobic phosphorus release process section through conventional pre-treatment, with the returned sluge thorough mixing from fast heavy pond mud-water separation process section, realize the anaerobic phosphorus release of polyP bacteria.The mixed solution plug-flow is to the denitrification phosphorus-collecting process section, with the NO that contains from BAF nitration processes section
3 -Internal reflux water mix, realize denitrification phosphorus-collecting.Mixed solution continues plug-flow to hypoxemia synchronous nitration and denitrification and suction phosphorus process section, carries out the poly-phosphorus of synchronous nitration and denitrification and hypoxemia.Mixed solution continues plug-flow and carries out mud-water separation to rapid sedimentation tank mud-water separation process section, and a part of activity sludge reflux is released phosphorus once more to the anaerobic phosphorus release process section, and the rich phosphorus excess sludge of another part drains into the sludge dewatering equipment dehydration, realizes biological phosphate-eliminating.Fast sinking pool effluent enters BAF nitration processes section.BAF oxidation residue NH
4 -, degraded residue organic pollutant is held back suspended substance.A part contains NO
3 -Sewage backflow to denitrification phosphorus-collecting process section carry out denitrification denitrogenation.Sewage up to standard is discharged treatment system by BAF nitration processes section.
2, according to the described ADSEF dephosphorization denitrogenation of claim 1 sewage treatment process, its characteristics are to adopt fast heavy pond to carry out mud-water separation.
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| CNA2003101053154A CN1607188A (en) | 2003-10-13 | 2003-10-13 | ADSEF dephosphorizing-denitrification sewage treatment technique |
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| CNA2003101053154A CN1607188A (en) | 2003-10-13 | 2003-10-13 | ADSEF dephosphorizing-denitrification sewage treatment technique |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100545102C (en) * | 2007-01-19 | 2009-09-30 | 同济大学 | A kind of anaerobic-hypoxia condition is the method for biological treatment while dephosphorization denitrogenation down |
| CN104445798A (en) * | 2013-12-10 | 2015-03-25 | 中国环境科学研究院 | Vertical sewage treatment equipment and method |
| CN107354108A (en) * | 2017-08-03 | 2017-11-17 | 北京博达展望科技有限公司 | A kind of preparation method for phosphorous compound bacteria agent of degrading |
| CN111099726A (en) * | 2018-10-29 | 2020-05-05 | 江苏力鼎环保装备有限公司 | Synchronous denitrification and dephosphorization double-sludge sewage treatment system and treatment process thereof |
| CN112028379A (en) * | 2019-08-02 | 2020-12-04 | 南京中鹏环保科技发展有限公司 | Sewage treatment process for effectively denitrifying by utilizing endogenous respiration |
-
2003
- 2003-10-13 CN CNA2003101053154A patent/CN1607188A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100545102C (en) * | 2007-01-19 | 2009-09-30 | 同济大学 | A kind of anaerobic-hypoxia condition is the method for biological treatment while dephosphorization denitrogenation down |
| CN104445798A (en) * | 2013-12-10 | 2015-03-25 | 中国环境科学研究院 | Vertical sewage treatment equipment and method |
| WO2015085835A1 (en) * | 2013-12-10 | 2015-06-18 | 中国环境科学研究院 | Vertical sewage treatment device and method |
| US9845257B2 (en) | 2013-12-10 | 2017-12-19 | Chinese Research Academy Of Environmental Sciences | Vertical sewage treatment device and method |
| CN107354108A (en) * | 2017-08-03 | 2017-11-17 | 北京博达展望科技有限公司 | A kind of preparation method for phosphorous compound bacteria agent of degrading |
| CN111099726A (en) * | 2018-10-29 | 2020-05-05 | 江苏力鼎环保装备有限公司 | Synchronous denitrification and dephosphorization double-sludge sewage treatment system and treatment process thereof |
| CN112028379A (en) * | 2019-08-02 | 2020-12-04 | 南京中鹏环保科技发展有限公司 | Sewage treatment process for effectively denitrifying by utilizing endogenous respiration |
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