CN1227164C - Method for synchronous nitration/denitration treating urban waste water by sequence batch reactor (SBR) biological membrane process - Google Patents
Method for synchronous nitration/denitration treating urban waste water by sequence batch reactor (SBR) biological membrane process Download PDFInfo
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- CN1227164C CN1227164C CN 03126568 CN03126568A CN1227164C CN 1227164 C CN1227164 C CN 1227164C CN 03126568 CN03126568 CN 03126568 CN 03126568 A CN03126568 A CN 03126568A CN 1227164 C CN1227164 C CN 1227164C
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Abstract
The present invention relates to sewage treating technique, more specifically to a method for treating urban sewage with simultaneous nitrification and denitrification by a sequence batch bio-membrane method. The method comprises the steps of anaerobic circular water inflow, aerobic aeration, deposition and water discharge, wherein in the step of anaerobic circular water inflow, after the urban sewage enters a reactor from a water box, a circular pump is started, the concentration of dissolved oxygen in the reactor is controlled to be lower than 0.2 mg/L with anaerobic circulation for 2 hours to 3 hours; in the step of aerobic aeration, the urban sewage is started being aerated after anaerobic circulation, the concentration of dissolved oxygen in the reactor is controlled to be higher than 3.5 mg/L with aerobic aeration for 3 hours to 4 hours; in the step of deposition, the urban sewage is deposited for 0.5 hours to 1.0 hour; in the step of water discharge, the urban sewage is discharged for 0.3 hours to 0.6 hours. The present invention has the advantages of high efficiency for removing organic substances, good nitrification effect and good effluent water quality.
Description
Technical field
The present invention relates to sewage place technology, more specifically say so and carry out the method for synchronous nitration denitrification denitrogenation and dephosphorization Treating Municipal Sewage with sequencing batch biofilm reactor process.
Background technology
Urban sewage treatment process because the index request to nitrogen, phosphorus in the water outlet after handling is not high at that time, is in the majority with traditional activated sludge process, as hybrid fully, the various types of activated sludge processes of pulling flow type institute deutero-in mid-term the 1970s and 1980s substantially.In recent years, along with improving constantly that dephosphorization, denitrogenation are required, activated sludge process has obtained an evolution from theory into action, and absorption-biological degradation method (AB method), anaerobic-aerobic method (AO method), anaerobic-anoxic-aerobic method (A2O method), oxidation ditch process, sequencing batch active sludge with dephosphorization, denitrification effect have obtained development rapidly.But these methods want to have following shortcoming removing organic while denitrogenation dephosphorizing: flow process complexity, capital cost height, floor space are big; Turn round owing to there is mud to reflux, thereby expense is also high; And see that from the situation of present domestic sewage work operation the effluent index of organism and ammonia nitrogen can reach discharging standards, the effluent index of total phosphorus does not also reach national grade one discharge standard (0.5 mg/litre).Removal about total nitrogen in various treatment processs can only reach 30%, and the removal of total nitrogen is to finish at anaerobic stages.Several different biological respinses take place in municipal effluent biological denitrificaion, the dephosphorization process usually, 1.. organic aerobic oxidation; 2.. nitration reaction; 3.. anti-nitration reaction; 4.. the anaerobism of phosphorus discharges; 5.. the aerobic absorption of phosphorus.Most treatment process is all with oxygen-starved area and aerobic distinguishing, promptly form the release of so-called Prepositive denitrification and phosphorus, the absorption of rearmounted oxidation operation, nitrated, phosphorus is because according to traditional denitrogenation dephosphorizing theory, nitrification and denitrification can not take place simultaneously, nitrated should finishing under good oxygen condition.Denitrification should be finished under anoxia condition.The anaerobism of phosphorus discharges and absorb also should be respectively just can be finished under anoxic and aerobic state.In anaerobic state, must there be competent carbon source to satisfy denitrification and the requirement of releasing phosphorus simultaneously in other words.
Summary of the invention
The purpose of this invention is to provide a kind of operation is the method with sequencing batch biofilm reactor process synchronous nitration and denitrification Treating Municipal Sewage of aerobic/anaerobic, utilize the characteristics of its periodic running, realize synchronous nitration and denitrification at aerobic section, denitrogenation was finished in the aerobic period, make in a reaction unit and both removed organism, denitrogenation dephosphorizing is removed total nitrogen and is reached more than 70%, and makes water outlet total phosphorus (TP)≤0.5 mg/litre again.
The present invention comprises the steps: with the method for sequencing batch biofilm reactor process Treating Municipal Sewage
(1) anaerobism circulation water inlet: municipal effluent starts recycle pump after entering reactor from water tank, and dissolved oxygen in the controlling reactor (DO) concentration is less than 0.2 mg/litre, and anaerobism circulated 2～2.5 hours;
(2) aerobic aeration: in the controlling reactor dissolved oxygen (DO) concentration more than 3.5 mg/litre, aerobic aeration 3～4 hours;
(3) precipitation: sedimentation time 0.5～1.0 hour;
(4) draining: water discharge time 0.3～0.6 hour.
Above-mentioned preferred working time, condition was: 2.5 hours cycling time of anaerobism; 4 hours aerobic aeration time; Sedimentation time 1 hour; Water discharge time 0.5 hour.
The device that the inventive method can adopt present general biomembrance process to dispose of sewage is realized.Table 1 has been listed the operation scheme and the reaction process of this method, and phosphorus promptly takes place to discharge when anaerobism circulation water inlet; Organism is degraded, is carried out synchronous nitration and denitrification and absorbs phosphorus during aerobic aeration; Suspended substance and mud precipitate during the precipitation operation.
Table 1
| Operation scheme | Reaction process |
| Water inlet (anaerobism circulation) | Discharge phosphorus |
| Aeration (aerobic) | Degradation of organic substances, synchronous nitration and denitrification, absorption phosphorus |
| Precipitation | Suspended substance and sludge settling |
| Draining | After the processing, discharge water |
The present invention compared with prior art has following advantage:
1, because flow process is simple, only establish equalizing tank and aeration tank (second pond of holding concurrently), can save a heavy pond and a second pond, reduced floor space, can save the part initial cost like this;
2, owing to, reduced working cost and saved the refluxing unit expense without returned sluge; In addition, mud easily precipitates;
3, not being both of sequencing batch biofilm reactor process and sequencing batch active sludge becomes the microbial film that has carrier to the active sludge in the reactor, reduces mud growing amount 50%～70%, can reduce working cost 20%～30%;
4, it is about 25% to realize that at aerobic section denitrification can be saved the oxygen supply, cuts down the consumption of energy;
5, save the required carbon source 40% of denitrification, can make the releasing effect of phosphorus better in the anaerobism section;
6, shorten the reaction times, respective reaction device volume reducing;
7, remove the organic matter efficiency height, nitrification effect is good, effluent quality is good.
Embodiment
Treatment sewage is the city domestic sewage that urban pipe network is discharged, and the sewage disposal step is as follows:
(1) after sewage enters reactor from water tank, start recycle pump and begin anaerobism circulation, in the anaerobism working cycle in the reactor dissolved oxygen concentration be below 0.2 mg/litre, anaerobism circulation 3.5 hours;
(2) make the interior dissolved oxygen concentration of reactor maintain 3.5 mg/litre, aerobic aeration 4 hours;
(3) stop aeration, precipitate 1 hour;
(4) idle after the draining, wait for the operation in following cycle.
Test-results 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 is when the 15-25 mg/litre, and through 4 hours aeration, water outlet reached below 4 mg/litre substantially,
(3) water inlet total nitrogen (TN) concentration is when the 14.85-25.8 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 through 3.5 hours anaerobism circulations, 4 hours aerobic aeration, water outlet can reach below 0.5 mg/litre, system to the clearance of TP more than 90%.
Claims (2)
1, a kind of method with sequencing batch biofilm reactor process synchronous nitration and denitrification Treating Municipal Sewage is characterized in that comprising the steps:
(1) anaerobism circulation water inlet: municipal effluent starts recycle pump after entering reactor from water tank, and dissolved oxygen concentration is less than 0.2 mg/litre in the controlling reactor, and anaerobism circulated 2～2.5 hours;
(2) aerobic aeration: begin aeration after the anaerobism circulation, in the controlling reactor dissolved oxygen concentration more than 3.5 mg/litre, aerobic aeration 3～4 hours;
(3) precipitation: sedimentation time 0.5～1.0 hour;
(4) draining: water discharge time 0.3～0.6 hour.
2, the method with sequencing batch biofilm reactor process synchronous nitration and denitrification Treating Municipal Sewage as claimed in claim 1 is characterized in that 2.5 hours cycling time of anaerobism; 4 hours aerobic aeration time; Sedimentation time 1 hour; Water discharge time 0.5 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126568 CN1227164C (en) | 2003-05-15 | 2003-05-15 | Method for synchronous nitration/denitration treating urban waste water by sequence batch reactor (SBR) biological membrane process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03126568 CN1227164C (en) | 2003-05-15 | 2003-05-15 | Method for synchronous nitration/denitration treating urban waste water by sequence batch reactor (SBR) biological membrane process |
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| Publication Number | Publication Date |
|---|---|
| CN1450004A CN1450004A (en) | 2003-10-22 |
| CN1227164C true CN1227164C (en) | 2005-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03126568 Expired - Fee Related CN1227164C (en) | 2003-05-15 | 2003-05-15 | Method for synchronous nitration/denitration treating urban waste water by sequence batch reactor (SBR) biological membrane process |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102040281B (en) * | 2009-10-21 | 2014-12-31 | 中国石油化工股份有限公司 | Method for culturing denitrogenized granular sludge |
| CN102432100B (en) * | 2011-10-27 | 2013-08-14 | 北京工商大学 | Method for efficiently degrading morpholine waste water |
| CN104724828B (en) * | 2015-03-31 | 2017-05-03 | 成都信息工程学院 | Synchronous nitrification and denitrification coupled dephosphorization method for domestic sewage with low carbon nitrogen ratio |
| CN106477822A (en) * | 2016-11-17 | 2017-03-08 | 上海晶宇环境工程股份有限公司 | The device of electrolysis synchronous nitration denitrification denitrogenation improved process |
| CN109534508A (en) * | 2018-12-26 | 2019-03-29 | 河北旭杰环境工程有限公司 | Municipal wastewater processing method based on synchronous nitration and denitrification |
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