CN103693734A - Method for initiating nitrosification granular sludge for domestic sewage treatment - Google Patents
Method for initiating nitrosification granular sludge for domestic sewage treatment Download PDFInfo
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- CN103693734A CN103693734A CN201310688144.6A CN201310688144A CN103693734A CN 103693734 A CN103693734 A CN 103693734A CN 201310688144 A CN201310688144 A CN 201310688144A CN 103693734 A CN103693734 A CN 103693734A
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a method for initiating nitrosification granular sludge for domestic sewage treatment, belonging to the field of water environmental recovery and regeneration. The method comprises the steps: inoculating sludge: inoculating returned sludge in an A<2>/O pool of a municipal sewage treatment plant to a reactor, wherein the concentration of inoculated sludge is 6-7mg/L; at an acclimation phase of nitrosification, adding ammonia nitrogen and sodium carbonate into domestic sewage, so as to form inlet water, under the conditions that the temperature of the reactor is 25+/-1 DEG C and the pH value is 7.5-7.9, maintaining the oxidation rate of ammonia nitrogen to be 58-65% through controlling the hydraulic retention time to be 1-2 hours until the nitrosification ratio reaches over 90%, and running for more than two weeks, wherein the granule size of sludge granules reaches 0.3mm during running; by adopting the inlet water as the domestic sewage, controlling the hydraulic retention time to be 2-3.5 hours, and running for more than two weeks in a manner that the nitrosification ratio can still be maintained to be over 90% when the oxidation rate of ammonia nitrogen is over 80%, wherein the average granule size of the granular sludge reaches 0.4mm after running for more than two weeks, and the condition that the nitrosification granular sludge for domestic sewage treatment is successfully initiated is believed.
Description
Technical field
The invention belongs to city domestic sewage and process and regeneration field, be specifically related at room temperature by processing sanitary sewage, turn out the method for nitrosated granular sludge.
Background technology
Along with the fast development of China's industrial and agricultural production, the raising day by day of living standards of the people, the water pollution situation that China turns to sign with water eutrophication is day by day serious, lake eutrophication ratio rises to 77% of the later stage nineties from 41% of the later stage eighties 20th century, and this is mainly to cause because the excessive nutritive substances such as nitrogen phosphorus enter water body.Nitrogen, phosphorus can promote the planktonic amount reproductions such as algae after entering water body, cause oxygen in water to fall sharply, and fish kill, causes body eutrophication.
Yet, because the ripe denitrification dephosphorization technique of current operation is mainly that the removal approach of nitrogen phosphorus is too loaded down with trivial details according to traditional nitration denitrification Design Theory, causing that operational path is complicated, working cost is high, COD and nitrated power consumption are huge.So the efficient wastewater biological denitrificaion dephosphorization technique of exploiting economy has become emphasis and the focus of current Water Pollution Control Engineering area research, the Sustainable development of ecological & harmonious society build to(for) China is of great immediate significance.
Anammox is the simplest and the most direct wastewater biological denitrificaion approach of finding at present, with traditional nitrated-denitrification denitrogenation technique compares, have flow process simple and direct, process that load is high, oxygen-consumption is few, without additional organic and inorganic carbon source, sludge yield is low and the many merits such as non-secondary pollution, is the ideal chose of municipal effluent denitrogenation.Nitrosification, as the preliminary processes of Anammox, for Anammox provides into water, is the prerequisite and basis of Anammox, and its treatment effect and efficiency directly affect follow-up anaerobic ammonia oxidation process.But in practical study, nitrosification exists mud to be difficult to hold to stay and growth, capacity of resisting impact load are poor, the easy unstability of long-time running turns to the problems such as complete nitrification, is difficult to realize efficient stable operation.
Recent study personnel are in order further to improve biological sewage treatment, the removal efficiency to nutritive substances such as nitrogen phosphorus in sewage particularly, start to attempt the good settling character of the efficient bio-active of microorganism in aerobe treatment system and anaerobic grain sludge to carry out combination, thereby develop biological sewage treatment platform a---aerobic granular sludge treatment system with great potential.Thereby granule sludge technology is applied to Short-Cut Nitrification Process, and cultivate the nitrosated granular sludge with special AOB membrane structure, be expected to realize the Short-Cut Nitrification Process of efficient stable.Thereby, how can turn out the focus that well behaved nitrosated granular sludge becomes research.
Summary of the invention
The object of the invention is to provide a kind of starting method of processing the nitrosated granular sludge of sanitary sewage.
In the present invention, by inoculating cotton-shaped nitrifying sludge, under the condition of the high FA of Inlet and outlet water and high DO, by suppressing and superseded NOB, make a large amount of accumulation of AOB cultivate nitrosated granular sludge, and by changing influent quality, finally realize its processing to sanitary sewage.
A starting method of processing the nitrosated granular sludge of city domestic sewage, concrete steps are as follows:
1) seed sludge, the sbr reactor device inoculation A of municipal wastewater treatment plant
2returned sluge in/O pond, seed sludge concentration is 6～7mg/L;
2) the nitrosifying domestication stage, adopts to adding ammonia nitrogen in sanitary sewage and sodium carbonate is water inlet, and the mass concentration of controlling initial influent ammonia nitrogen is 120～140mg/L, and the mass concentration of COD is at 200～300mg/L, and basicity is with CaCO
3meter mass concentration is 8～10 times of ammonia nitrogen mass concentration, DO is 6～8mg/L, the temperature of sbr reactor device is 25 ± 1, and ℃ pH is 7.5～7.9, by controlling hydraulic detention time, is 1～2h, make the oxidation ratio of ammonia nitrogen maintain 58%～65%, until nitrous rate reaches more than 90%, and steady running is more than two weeks, during mud granule particle diameter reach 0.3mm, think and be successfully domesticated for nitrosification mud, enter subsequently sanitary sewage treatment stage;
3) sanitary sewage treatment stage, adopt water inlet for sanitary sewage, the mass concentration of ammonia nitrogen is reduced to 60～80mg/L, the mass concentration of COD is 200～300mg/L, basicity is with CaCO
3count 385-415mg/L, DO is 6～8mg/L, sbr reactor actuator temperature is 25 ± 1, ℃ pH is 7.5～7.9, and control hydraulic detention time is 2～3.5h, and the oxidation ratio of ammonia nitrogen is more than 80%, nitrous rate still can maintain more than 90%, and can steady running more than two weeks, now the median size of granule sludge reaches 0.4mm, thinks that the nitrosated granular sludge of processing sanitary sewage starts successfully.
Start technique with existing nitrosated granular sludge and compare, the present invention has following beneficial effect:
1) the invention provides a kind of method of simple cultivation nitrosated granular sludge;
2) the invention provides a kind of nitrosifying acclimation method;
Below in conjunction with embodiment, the invention will be further described, but protection scope of the present invention is not limited to this.
Accompanying drawing explanation:
Fig. 1 adopts the sbr reactor device granule sludge cultivation of the inventive method and the operating performance figure of stable operation stage.
Fig. 2 is the change of size figure that adopts granule sludge in the sbr reactor device of the inventive method.
Embodiment
In example of the present invention, for sbr reactor device basal conditions, specifically describe, but present method is not limited to this parameter S BR reactor.
Embodiment 1:
Testing apparatus is sequencing batch reactor (SBR).Testing apparatus is made by synthetic glass, internal diameter 80mm, high 1m, cumulative volume 5L, effective volume 4L.Diameter is arranged at sbr reactor device bottom is the microporous aeration device of 60mm.On sbr reactor device, every 10cm is provided with a thief hole, and water port is located at apart from 30cm place, bottom, and from top water inlet, volume exchange rate is 62.5%.
Inoculation adopts the A of municipal wastewater treatment plant
2returned sluge in/O pond, sludge concentration is 6.5g/L, controls initial influent ammonia nitrogen mass concentration 120～140mg/L, and the mass concentration of COD is at 200～300mg/L, and basicity is with CaCO
3meter mass concentration is 8～10 times of ammonia nitrogen mass concentration, and DO is 6～8mg/L, and the temperature of sbr reactor device is 25 ± 1.℃ sbr reactor device water inlet 2min, aeration time is 1～2h, precipitation 18min, draining 2min, moves 2～5 cycles every day.By controlling oxidation ratio that aeration time controls ammonia nitrogen 57%～65%, until the 12nd day, nitrous rate can reach 90%, steady running afterwards 20 days, nitrous rate maintains more than 90% always during this time, and now the median size of particle reaches 0.3mm, and the nitrosifying domestication stage finishes.
Change influent quality, adopt the secondary treatment yielding water of city domestic sewage, the mass concentration of ammonia nitrogen is reduced to 60～80mg/L, and the mass concentration of COD is 200～300mg/L, and basicity is with CaCO
3counting 385～415mg/L, is 2～3h by controlling aeration time, keeps the oxidation ratio of ammonia nitrogen more than 80%, can access nitrosification rate more than 90%, and after continuous and steady operation 14 days, the median size of granule sludge is 0.4mm, the nitrosated granular sludge of processing sanitary sewage starts successfully.
After starting successfully, operation surpasses 14 days, and sbr reactor device treatment effect is stable, as Fig. 1.The change of size of granule sludge is as Fig. 2.
Claims (1)
1. process a starting method for the nitrosated granular sludge of city domestic sewage, it is characterized in that concrete steps are as follows:
1) seed sludge, the sbr reactor device inoculation A of municipal wastewater treatment plant
2returned sluge in/O pond, seed sludge concentration is 6～7mg/L;
2) the nitrosifying domestication stage, adopts to adding ammonia nitrogen in sanitary sewage and sodium carbonate is water inlet, and the mass concentration of controlling initial influent ammonia nitrogen is 120～140mg/L, and the mass concentration of COD is at 200～300mg/L, and basicity is with CaCO
3meter mass concentration is 8～10 times of ammonia nitrogen mass concentration, DO is 6～8mg/L, the temperature of sbr reactor device is at 25 ± 1 ℃, and pH is 7.5～7.9, by controlling hydraulic detention time, is 1～2h, make the oxidation ratio of ammonia nitrogen maintain 58%～65%, until nitrous rate reaches more than 90%, and operation is more than two weeks, during mud granule particle diameter reach 0.3mm, think and be successfully domesticated for nitrosification mud, enter subsequently sanitary sewage treatment stage;
3) sanitary sewage treatment stage, adopt water inlet for sanitary sewage, the mass concentration of ammonia nitrogen is reduced to 60～80mg/L, the mass concentration of COD is 200～300mg/L, basicity is with CaCO
3count 385-415mg/L, DO is 6～8mg/L, sbr reactor actuator temperature is 25 ± 1 ℃, pH is 7.5～7.9, control hydraulic detention time is 2～3.5h, and the oxidation ratio of ammonia nitrogen is 80% when above, and nitrous rate still can maintain more than 90% operation more than two weeks, now the median size of granule sludge reaches 0.4mm, thinks that the nitrosated granular sludge of processing sanitary sewage starts successfully.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384320A (en) * | 2015-11-25 | 2016-03-09 | 中南大学 | Method for improving sludge settling performance of nitrosation reactor |
| CN106011017A (en) * | 2016-06-28 | 2016-10-12 | 苏州科技大学 | Method for realizing rapid proliferation of anaerobic ammonium oxidation bacteria |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112194A (en) * | 2001-10-09 | 2003-04-15 | Fuji Electric Co Ltd | Method for controlling nitrogen removing process |
| CN101555068A (en) * | 2009-04-17 | 2009-10-14 | 北京工业大学 | Culture method of aerobic granular sludge for simultaneous denitrification and dephosphorization of domestic sewage at low and normal temperature |
| CN103121750A (en) * | 2013-01-08 | 2013-05-29 | 北京工业大学 | High-efficiency culture method of urban domestic sewage nitrosation granule sludge |
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- 2013-12-15 CN CN201310688144.6A patent/CN103693734A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003112194A (en) * | 2001-10-09 | 2003-04-15 | Fuji Electric Co Ltd | Method for controlling nitrogen removing process |
| CN101555068A (en) * | 2009-04-17 | 2009-10-14 | 北京工业大学 | Culture method of aerobic granular sludge for simultaneous denitrification and dephosphorization of domestic sewage at low and normal temperature |
| CN103121750A (en) * | 2013-01-08 | 2013-05-29 | 北京工业大学 | High-efficiency culture method of urban domestic sewage nitrosation granule sludge |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105384320A (en) * | 2015-11-25 | 2016-03-09 | 中南大学 | Method for improving sludge settling performance of nitrosation reactor |
| CN105384320B (en) * | 2015-11-25 | 2018-08-17 | 中南大学 | A method of improving nitrosation reactor sludge settling property |
| CN106011017A (en) * | 2016-06-28 | 2016-10-12 | 苏州科技大学 | Method for realizing rapid proliferation of anaerobic ammonium oxidation bacteria |
| CN106011017B (en) * | 2016-06-28 | 2019-12-06 | 苏州科技大学 | method for realizing rapid proliferation of anaerobic ammonium oxidation bacteria |
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Application publication date: 20140402 |