CN1242941C - Method for treating urban sewage through denitrifying process for phophorous removal and defluorination in biomembrane system in sequential batch mode - Google Patents
Method for treating urban sewage through denitrifying process for phophorous removal and defluorination in biomembrane system in sequential batch mode Download PDFInfo
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- CN1242941C CN1242941C CNB2003101120106A CN200310112010A CN1242941C CN 1242941 C CN1242941 C CN 1242941C CN B2003101120106 A CNB2003101120106 A CN B2003101120106A CN 200310112010 A CN200310112010 A CN 200310112010A CN 1242941 C CN1242941 C CN 1242941C
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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
The present invention relates to a method for treating municipal sewage by using ways of denitrifying dephosphorization and denitrification by using a sequence batch type biological film system. The present invention comprises eight steps; in a water entrance stage, raw water enters alternatively primary reactors A and B at intervals of four hours; in an anaerobic stage, the raw water is anaerobically circulated in the primary reactors A and B for two hours to release phosphorus; in a still standing water change stage, after anaerobic circulation, the primary reactors are placed statically for deposition for 0.5 hour, supernatant liquid (the concentration of TP is from 6.0 milligrams per liter to 25.0 milligrams per liter) which has a high phosphorus concentration is drained into a secondary reactor, etc. By using the characteristics of a sequence batch type, denitrifying phosphorus gathering bacteria are used in a denitrifying phosphorus gathering stage to remove phosphorus and phosphorus so that the removal rate of organism biologic oxygen demand (BOD5) achieves 90% to 99%, the removal rate of total nitrogen (TN) achieves 70%, and the total phosphorus (TP) of yielding water is smaller than 0.5 mg/l.
Description
Technical field
The present invention relates to sewage treatment area, the method for the sequencing batch biofilm system denitrification dephosphorization denitrification Treating Municipal Sewage of saying so more specifically.
Background technology
Along with rapid development of economy, more and more higher in recent years to the requirement of environmental quality.Urban sewage treatment technology has had very big progress.Along with improving constantly that dephosphorization, denitrogenation are required, the urban sewage treatment process activated sludge process has obtained an evolution from theory into action, has absorption-biological degradation method (AB method), anaerobic-aerobic method (AO method), anaerobic-anoxic-aerobic method (A of dephosphorization, denitrification effect
2The O method), oxidation ditch process, sequencing batch active sludge have obtained development rapidly.These biological carbon and phosphorous removal technology, nitrification is not independently finished, and the absorption of phosphorus need be finished under aerobic state.The removal of total nitrogen only about 30%, is handled back water outlet total phosphorus about 1mg/1, does not also reach national grade one discharge standard.Active sludge in the system is the mixed bacterial of carbon elimination, nitrated, denitrification, polyP bacteria.In biological nitration and denitrification and dephosphorization process, certainly existing such contradiction:
1, the different mud battle in age of nitrifier and polyP bacteria,
2, the low organic concentration of nitrated requirement, the denitrification organic concentration of having relatively high expectations;
3, the nitrated hyperoxia that requires, denitrification requires hypoxemia;
4, nitrifying process provides nitrate for denitrification process, but the nitrate of nitrifying process itself is when too much, again nitrifying process is produced and suppresses and whole process can not be proceeded;
5, nitrifying process is to produce acid consumption alkali, and denitrification process is to produce basicity.
Summary of the invention
The contriver finds by the test of exploration, utilize the sequencing batch biofilm treatment system to carry out denitrification dephosphorization denitrification and can solve 5 above-mentioned contradictions, and utilize denitrifying phosphorus removing bacteria in anoxic denitrification with the nitric nitrogen for the electron acceptor(EA) excess absorbs phosphorus in the water, dephosphorization and denitrification are finished synchronously.
The method that the purpose of this invention is to provide a kind of sequencing batch biofilm system denitrification dephosphorization denitrification Treating Municipal Sewage is utilized the characteristics of sequence batch (, utilizes denitrification phosphorus-collecting bacterium dephosphorization denitrogenation in the denitrification phosphorus-collecting phase.Make organism biochemical oxygen demand (BOD) (BOD
5) clearance reach 90%-99%, the clearance of total nitrogen (TN) reaches 70%, and makes water outlet total phosphorus (TP)＜0.5mg/1.
The method process flow sheet of sequencing batch biofilm of the present invention system denitrification dephosphorization denitrification Treating Municipal Sewage as shown in Figure 1, the first step and second stage sequencing batch biofilm reactor (SBBR reactor) respectively are 2 covers; From advancing former water to water outlet, the first step sequencing batch biofilm reactor cycle of operation is 8～9 hours, and the second stage sequencing batch biofilm reactor cycle of operation is 4 hours; The water outlet of second stage sequencing batch biofilm reactor alternately entered the first step (A, B) sequencing batch biofilm reactor in time at interval in 4 hours
The method of sequencing batch biofilm of the present invention system denitrification dephosphorization denitrification Treating Municipal Sewage comprises the steps:
(1). the water inlet phase: raw water spacer alternately entered first step reactor A and B in 4 hours;
(2). anaerobic phase: former water carries out anaerobism circulation 2 hours in A and B, carry out the release of phosphorus;
(3). change the water phase in leaving standstill: first step reactor staticly settled 0.5 hour through after the anaerobism circulation, and the supernatant liquor of the phosphorus of TP concentration between 6.0 mg/litre-25.0 mg/litre is entered second stage reactor;
(4). the nitration reaction phase: in the reactor of the second stage, the high phosphorus water after staticly settling from first step reactor carries out nitration reaction through aerobic aeration 3.5 hours;
(5). the nitrification liquid internal reflux: second stage reactor staticly settles 30min after nitration reaction finishes, be that nitrification liquid is back to another first step reactor with supernatant liquor;
(6). the denitrification phosphorus-collecting phase: in first step reactor, the nitrification liquid from second stage reactor is carried out anoxic circulation 1.0 hours, mainly utilize denitrification phosphorus-collecting bacterium dephosphorization denitrogenation;
(7). the aerobic reaction phase: in first step reactor, anoxic was carried out aerobic aeration 4.0 hours after 1.0 hours, mainly carried out removal and the residual NH of aerobic suction phosphorus and BOD, COD
3-N's is nitrated;
(8). the sedimentation and drawing phase: first step reactor after aerobic end, staticly settle 0.5 hour after, supernatant liquor discharging will handle up to standard.
Described two-stage reactor is two sequencing batch biofilm reactors.The present invention compared with prior art has following advantage:
1. sequencing batch biofilm system denitrification dephosphorization denitrification technology can be saved aeration rate;
2. owing to utilize microbial film as carrier in the sequence batch (biological treatment reactor, sludge yield is few, has reduced follow-up mud handling capacity, can save capital cost and working cost.
3. reduce organic consumption, save the required carbon source of denitrification, be more suitable for the sewage of carbon, nitrogen, phosphorus ratio imbalance.
4. nitrated, denitrogenation, phosphor-removing effect are good.
Description of drawings
Fig. 1 is the inventive method schema.
Embodiment
As shown in Figure 1, treatment sewage is a city domestic sewage, and the sewage disposal step is as follows:
1. water inlet phase: raw water spacer alternately entered first step reactor A and B in 4 hours;
2. anaerobic phase: former water carries out anaerobism circulation 2 hours in A and B, carry out the release of phosphorus;
3. change the water phase in leaving standstill: first step reactor staticly settled 0.5 hour after circulating through anaerobism, and the supernatant that will have high concentration phosphorus enters second stage reactor;
4. nitration reaction phase: in the reactor of the second stage, the high phosphorus water after staticly settling from first step reactor carries out nitration reaction through aerobic aeration 3.5 hours;
5. nitrification liquid internal reflux: second stage reactor staticly settled 0.5 hour after nitration reaction finishes, and supernatant liquor (nitrification liquid) is back to first step reactor;
6. denitrification phosphorus-collecting phase: in first step reactor, the nitrification liquid from second stage reactor is carried out anoxic circulation 1.0 hours, mainly utilize denitrification phosphorus-collecting bacterium dephosphorization denitrogenation;
7. aerobic reaction phase: in first step reactor, anoxic was carried out aerobic aeration 4.0 hours after 1.0 hours, mainly carried out removal and the residual NH of aerobic suction phosphorus and BOD, COD
3-N's is nitrated;
8. sedimentation and drawing phase: first step reactor after aerobic end, staticly settle 0.5 hour after, will handle supernatant liquor discharging up to standard.
Result is as follows:
(1) urban sewage chemical oxygen requirement concentration (COD) is between the 86.9-250.6 mg/litre, biological oxygen demand (BOD
5) concentration between the 48.7-127.3 mg/litre, adopt technology of the present invention, its effluent COD concentration is less than 30 mg/litre, clearance about 80%, water outlet BOD
5Concentration below 15 mg/litre, clearance is about 90%;
(2) as water inlet NH
3-N concentration adopts technology of the present invention when the 15-25 mg/litre, water outlet reaches below 4 mg/litre substantially,
(3) water inlet total nitrogen (TN) concentration is when the 16.85-25.8 mg/litre, and water outlet TN concentration is below 4 mg/litre, and the clearance of TN is more than 70%;
(4) municipal effluent water inlet total phosphorus (TP) is in the 1.6-7.1 mg/litre, and water outlet can reach below 0.5 mg/litre, system to the clearance of TP more than 90%.
Claims (1)
1, the method for a kind of sequencing batch biofilm system denitrification dephosphorization denitrification Treating Municipal Sewage is characterized in that comprising the steps:
(1). the water inlet phase: raw water spacer alternately entered first step reactor A and B in 4 hours;
(2). anaerobic phase: former water carries out anaerobism circulation 2 hours in A and B, carry out the release of phosphorus;
(3). change the water phase in leaving standstill: first step reactor staticly settled 0.5 hour through after the anaerobism circulation, and the supernatant liquor of the phosphorus of TP concentration between 6.0 mg/litre-25.0 mg/litre is entered second stage reactor;
(4). the nitration reaction phase: in the reactor of the second stage, the high phosphorus water after staticly settling from first step reactor carries out nitration reaction through aerobic aeration 3.5 hours;
(5). the nitrification liquid internal reflux: second stage reactor staticly settles 30min after nitration reaction finishes, be that nitrification liquid is back to another first step reactor with supernatant liquor;
(6). the denitrification phosphorus-collecting phase: in first step reactor, the nitrification liquid from second stage reactor is carried out anoxic circulation 1.0 hours, carry out denitrification phosphorus-collecting bacterium dephosphorization denitrogenation;
(7). the aerobic reaction phase: in first step reactor, anoxic was carried out aerobic aeration 4.0 hours after 1.0 hours, carried out the nitrated of the removal of aerobic suction phosphorus and BOD, COD and residual NH3-N;
(8). the sedimentation and drawing phase: first step reactor after aerobic end, staticly settle 0.5 hour after, supernatant liquor is discharged;
Described two-stage reactor is two sequencing batch biofilm reactors.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2003101120106A CN1242941C (en) | 2003-11-04 | 2003-11-04 | Method for treating urban sewage through denitrifying process for phophorous removal and defluorination in biomembrane system in sequential batch mode |
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| CNB2003101120106A CN1242941C (en) | 2003-11-04 | 2003-11-04 | Method for treating urban sewage through denitrifying process for phophorous removal and defluorination in biomembrane system in sequential batch mode |
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| CN1242941C true CN1242941C (en) | 2006-02-22 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103601296B (en) * | 2013-11-15 | 2015-11-25 | 玉溪师范学院 | A kind of D-A of diphasic anaerobic anoxic alternate run 2/ O sewage-treating reactor |
| CN107311308B (en) * | 2016-04-26 | 2020-09-04 | 苏州科技大学 | Process for synchronously removing and enriching phosphorus by biomembrane method |
| CN108516654A (en) * | 2018-06-26 | 2018-09-11 | 沈阳环境科学研究院 | The biological reinforced artificial swamp waste water reclaiming integrated processing systems of SBBR+HVC and its integrated processing method |
| CN108911143A (en) * | 2018-09-03 | 2018-11-30 | 上海世渊环保科技有限公司 | A kind of stainless steel acid cleaning waste water denitrogenation processing system and method |
| CN109607774B (en) * | 2019-01-11 | 2021-12-24 | 长安大学 | SBBR-based deep nitrogen and phosphorus removal process |
| CN109851049A (en) * | 2019-04-11 | 2019-06-07 | 信开水环境投资有限公司 | Sewage treatment unit and its application method and purposes |
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