CN104276656B - The method of denitrification anaerobic ammonia oxidation SBR process high concentration nitrate waste water and municipal effluent - Google Patents
The method of denitrification anaerobic ammonia oxidation SBR process high concentration nitrate waste water and municipal effluent Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
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- C02F3/286—Anaerobic digestion processes including two or more steps
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/163—Nitrates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
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Abstract
The invention provides a kind of method of denitrification anaerobic ammonia oxidation process high concentration nitrate waste water and municipal effluent, belong to field of biological sewage treatment.Described method comprises the denitrification flora and anaerobic ammonia oxidizing bacteria of first cultivating respectively and taming and having incomplete Denitrification Characteristics, inoculate anaerobic ammonium oxidation sludge and there is the denitrification mud of higher nitrite accumulation rate in same reactor, nitrate wastewater and municipal effluent enter denitrification anaerobic ammonia oxidation sbr reactor device by a certain percentage, and nitrite and the ammonia nitrogen in municipal effluent of the accumulation of nitrate reduction process generate nitrogen by Anammox again and synchronously removed.The method is without the need under additional carbon condition, and the nitrate reduction that anaerobic ammonium oxidation process can produce by denitrifying bacteria, improves system nitric efficiency, provides and realizes effective way that is efficient, less energy-consumption sewage water denitrification.
Description
Technical field
The present invention relates to a kind of method of denitrification anaerobic ammonia oxidation SBR process high concentration nitrate waste water and municipal effluent, belong to the technical field of biological sewage treatment, specifically first cultivate respectively and tame the denitrification flora and Anammox flora with incomplete Denitrification Characteristics, inoculate anaerobic ammonium oxidation sludge and there is the denitrification mud of higher nitrite accumulation rate in same reactor, nitrate wastewater and municipal effluent are entered by a certain percentage denitrification anaerobic ammonia oxidation sbr reactor device, the nitrite of nitrate reduction process accumulation and the ammonia nitrogen in municipal effluent are reacted by Anammox and generate nitrogen and synchronously removed.
Background technology
Along with the quickening of China's process of industrialization, physical environment especially water surrounding has suffered more serious destruction, rivers and storehouse, lake quality of water environment worsen increasingly, and unprocessed or without suitably process discharge that is nitrogenous, phosphorus waste water is the major reason causing nitrogen and phosphorus pollution in a large number.In order to solve current water pollution problems, country accelerates the paces to water environment treatment, and discharge standard of municipal sewage plant is increasingly strict.In order to reach strict emission standard, the energy consumption of sewage treatment process also improves thereupon, and economic, efficient sewage denitrification method is the active demand in current sewage treatment works.High concentration nitrate waste water is the waste water that a kind of nitrogen load is higher, in sewage work, the water outlet of sludge-digestion liquid after aerobic nitrification and other trade effluents all can produce high concentration nitrate, not only increase the load of sewage work's denitrogenation, also add operation processing costs, if the undesirable meeting of denitrification effect has a strong impact on effluent quality, carrying out high concentration nitrate denitrogenation of waste water is cost-effectively important process in sewage disposal.
Anaerobic ammonia oxidation process is a kind of novel biological dinitrification technology, and principle is under anoxic conditions, and anaerobic ammonium oxidizing bacteria is with nitrite (NO
2 --N) be electron acceptor(EA), directly by ammonia nitrogen (NH
4 +-N) be oxidized to nitrogen (N
2).Compared with traditional technology, anaerobic ammonia oxidation process is without the need to oxygen supply and organic carbon source, and excess sludge production is low, and anaerobic ammonia oxidizing bacteria metabolic activity is high, and process volume transformation efficiency is high, is the bio-denitrifying sewage approach of the economical and efficient of generally acknowledging at present.But anaerobic ammonium oxidation process itself can produce nitrate, account for 11% into water total nitrogen, cause anaerobic ammonium oxidation process in theory maximum nitrogen removal rate be 89%, therefore, the method by denitrification process and anaerobic ammonium oxidation process being carried out being coupled can for improving the approach that nitric efficiency provides new.
Municipal effluent mainly comprises ammonia nitrogen and a large amount of biodegradable organic, and the organic carbon source that this part organism can be used as in denitrification process is utilized by denitrifying bacteria, by nitrate reduction.Utilize traditional nitration denitrification method to carry out municipal effluent denitrogenation and not only waste a large amount of organic carbon source in former water, and denitrification effect being unsatisfactory, still needing additional carbon to improve denitrification effect, because this increasing working cost.And the accumulation of municipal effluent short distance nitration process nitrous is difficult to realize and maintain stable, it is the bottleneck that municipal effluent Anammox realizes.
Utilize part denitrification to be coupled with Anammox, namely denitrifying ammoxidation process processes high concentration nitrate waste water and municipal effluent simultaneously, is to solve the one economy of sewage water denitrification, effective new way.
Summary of the invention
The object of the invention is to solve the problems of the technologies described above, a kind of method of denitrification anaerobic ammonia oxidation SBR process high concentration nitrate waste water and municipal effluent is proposed, specifically first cultivate respectively and tame the denitrification mud and anaerobic ammonium oxidation sludge with incomplete Denitrification Characteristics, inoculate anaerobic ammonium oxidation sludge and there is the denitrification mud of higher nitrite accumulation rate in same reactor, nitrate wastewater and municipal effluent enter denitrifying ammoxidation sbr reactor device by a certain percentage simultaneously, ammonia nitrogen in the nitrite of nitrate reduction process accumulation and municipal effluent generates nitrogen by Anammox again and is removed.
The object of the invention is to be achieved through the following technical solutions:
The method of denitrification anaerobic ammonia oxidation SBR process high concentration nitrate waste water and municipal effluent, is characterized in that, first cultivate incomplete denitrifying bacteria and anaerobic ammonia oxidizing bacteria respectively, then tames the symbiosis flora of denitrification anaerobic ammonia oxidation, and method comprises the following steps:
Step one: inoculation denitrification mud is in denitrification anaerobic ammonia oxidation sbr reactor device 3, and control the rear sludge concentration 2000 ~ 3500mg/L of inoculation, sludge age is 30 ~ 50 days; Nitrate wastewater is collected in high concentration nitrate waste water water tank 1, and its nitrate nitrogen concentration is 300 ~ 700mg/L, and nitrate wastewater enters denitrification anaerobic ammonia oxidation sbr reactor device by the first peristaltic pump 1.1; Municipal effluent in municipal effluent water tank 2 enters in denitrification anaerobic ammonia oxidation sbr reactor device by the second peristaltic pump 2.1, and controlling initial COD in reactor is 2.0 ~ 3.5 with the ratio of nitrate nitrogen mass concentration; Anoxia stirring denitrification 60min ~ 180min after each cycle water inlet, 60min ~ 120min is staticly settled after stirring terminates, after precipitation terminates, supernatant liquor is discharged, draining ratio is 20% ~ 60%, until water outlet nitrite accumulation rate is 80% ~ 100%, complete incomplete denitrification culturing sludge process; When water outlet nitrite accumulation rate lower than 80% time, by reducing initial COD and the ratio of nitrate nitrogen mass concentration in 2.0 ~ 3.5 scopes, make water outlet nitrite accumulation rate be 80% ~ 100%;
Step 2: inoculation anaerobic ammonium oxidation sludge is in another sbr reactor device, and make sludge concentration in reactor be 1000 ~ 2500mg/L, sludge age is 40 ~ 60 days; Sewage containing ammonia nitrogen and nitrite nitrogen is entered in denitrification anaerobic ammonia oxidation sbr reactor device by peristaltic pump, and wherein the ratio of ammonia nitrogen and nitrite nitrogen concentration is 1:1.32, anoxia stirring after each cycle water inlet, sedimentation and drawing, and draining ratio is 20% ~ 60%; Temperature controls between 27 DEG C ~ 33 DEG C; Until water outlet nitrogen removal rate is greater than 70%, complete anaerobic ammonium oxidation sludge culturing process;
Step 3: the anaerobic ammonium oxidation sludge described in step 2 and incomplete denitrification mud are inoculated into another set of denitrification anaerobic ammonia oxidation sbr reactor device by sludge concentration than for 2.5:1 ~ 4:1, controlling sludge concentration in inoculation post-reactor is 1500mg/L ~ 3500mg/L, and sludge age is 40 ~ 60 days;
Step 4: the municipal effluent after inoculation in municipal effluent water tank 2 by volume for 5:1 ~ 10:1 enters into denitrification anaerobic ammonia oxidation sbr reactor device 3 with the nitrate wastewater in high concentration nitrate waste water water tank 1 by the first peristaltic pump 1.1 by the second peristaltic pump 2.1; Anoxia stirring 4 ~ 7h after water inlet; Precipitation 30 ~ 60min, discharge supernatant liquor, draining ratio is 40% ~ 60%.
Know-why:
Denitrification anaerobic ammonia oxidation sbr reactor device inoculation anaerobic ammonium oxidation sludge and the denitrification mud with incomplete Denitrification Characteristics, containing a class denitrifying bacteria in the denitrification mud of wherein incomplete Denitrification Characteristics, this kind of bacterium can only when organic carbon source be limited, can only be nitrite by nitrate reduction, and be not nitrogen by nitrate reductase further, therefore can realize the high accumulation of denitrification process nitrite.Anammox reaction take ammonia nitrogen as electron donor, and nitrite is electron acceptor(EA), and end reaction generates nitrogen and a small amount of nitrate.Therefore high concentration nitrate waste water can utilize Anammox effect to remove by the nitrite that part denitrification produces.Containing certain biodegradable organic carbon source in municipal effluent, high concentration nitrate waste water and municipal effluent enter denitrifying ammoxidation reactor by a certain percentage simultaneously, make the interior initial carbon-nitrogen ratio of reactor 2.0 ~ 3.5, incomplete denitrifying bacteria utilizes the organism in municipal effluent to be nitrite by nitrate reduction, then the ammonia nitrogen synchronously and in municipal effluent is obtained by reacting removal by Anammox.The part nitrate that anaerobic ammonium oxidation process produces can be reduced to nitrogen by denitrification, the nitric efficiency of further raising system, improves effluent quality.
The denitrification anaerobic ammonia oxidation process high concentration nitrate waste water that the present invention relates to and municipal effluent have the following advantages:
1) utilizing the mud with incomplete Denitrification Characteristics, can be nitrite by the nitrate reduction in high concentration nitrate waste water, for Anammox provides stable response matrix;
2) incomplete denitrification mud and anaerobic ammonium oxidation sludge are inoculated with same reactor, denitrification can improve system nitric efficiency further, improves effluent quality;
3) adopt sequence batch (sbr reactor device effectively to hold and stay Anammox flora, ensure the denitrification effect of denitrification anaerobic ammonia oxidation system.
Accompanying drawing explanation
Fig. 1 is the method flow diagram of denitrification anaerobic ammonia oxidation SBR process high concentration nitrate waste water and municipal effluent.
Embodiment
Below in conjunction with accompanying drawing and specific examples, the invention will be further described:
Test municipal effluent used and adopt Families Home of Beijing University of Technology sanitary sewage, significant parameter is: COD is 200 ~ 300mg/L, and ammonia nitrogen concentration is 60 ~ 80mg/L, total nitrogen concentration 60 ~ 85mg/L; This Domestic sewage collecting is in municipal effluent water tank; Test high concentration nitrate waste water used adopt certain sludge from wastewater treatment plant Digestive system aerobic nitrification after water outlet, its nitrate concentration is 450 ~ 550mg/L, collects in high concentration nitrate waste water water tank.
Step one: inoculation denitrification mud is in denitrification anaerobic ammonia oxidation sbr reactor device, and this reactor useful volume is 12L, and after inoculation, sludge concentration is 2500mg/L, and sludge age is 40 days; Nitrate wastewater in high concentration nitrate waste water water tank (1) enters in denitrification anaerobic ammonia oxidation sbr reactor device by the first peristaltic pump (1.1), and each cycle water inlet volume is 1L; Municipal effluent in municipal effluent water tank (2) enters in denitrification anaerobic ammonia oxidation sbr reactor device by the second peristaltic pump (2.1), for denitrification provides carbon source, make initial COD in reactor be 2.6 with the ratio of nitrate nitrogen mass concentration, entering municipal effluent volume is 5L; Anoxia stirring denitrification 120min after each cycle water inlet, stir after terminating and staticly settle 60min, discharged by supernatant liquor after precipitation terminates, draining ratio is 50%, until water outlet nitrite accumulation rate is 80% ~ 100%, incomplete denitrification culturing sludge end of processing.
Step 2: inoculation anaerobic ammonium oxidation sludge is in another sbr reactor device, and make sludge concentration in reactor be 1900mg/L, sludge age is 50 days; Sewage containing ammonia nitrogen and nitrite nitrogen enters in this reactor by peristaltic pump, and water inlet volume is 6L, and in water inlet, ammonia nitrogen concentration is 40mg/L, and nitrite nitrogen concentration is 60mg/L; Anoxia stirring 5h after each cycle water inlet, draining after precipitation 1h, draining ratio is 50%; Temperature controls at 28 ~ 30 DEG C; Until water outlet nitrogen removal rate is greater than 70%, anaerobic ammonium oxidation sludge culturing process terminates.
Step 3: as shown in Figure 1, anaerobic ammonium oxidation sludge is inoculated into denitrification anaerobic ammonia oxidation sbr reactor device another set of step one described in by sludge concentration than for 3:1 with incomplete denitrification mud; Denitrification anaerobic ammonia oxidation reactor sludge concentration MLSS=2500mg/L after inoculation; Sludge age SRT is 50 days, and temperature controls at 28 ~ 30 DEG C.
Municipal effluent and high concentration nitrate waste water enter into denitrification anaerobic ammonia oxidation sbr reactor device simultaneously, reactor effective volume is 12L, and each cycle water inlet cumulative volume is 7.2L, and wherein municipal effluent water inlet volume is 6.2L, high concentration nitrate influent waste water volume is 1L, and volume ratio is 6.2:1; Anoxia stirring 6h after water inlet end; Quiescent setting 60min, discharged by supernatant liquor after precipitation terminates, draining ratio is 60%.Water outlet ammonia nitrogen concentration <5mg/L, nitrate concentration <5mg/L, total nitrogen <10mg/L, nitrogen removal rate reaches 90% ~ 95%.
Long run test result shows:
Denitrification anaerobic ammonia oxidation sbr reactor device sludge concentration MLSS is 2500mg/L, and sludge age is 50 days, and temperature controls at 28 ~ 30 DEG C, municipal effluent and high concentration nitrate waste water be by volume 6.2:1 as water inlet, anoxia stirring 6h, draining ratio is 60%; The total sewage quantity of whole system each cycle process is 7.2L, without the need to additional carbon, water outlet ammonia nitrogen concentration <5mg/L, nitrate concentration <5mg/L, total nitrogen <10mg/L, nitrogen removal rate reaches 90% ~ 95%, can realize municipal effluent and the denitrogenation of high concentration nitrate waste water synchronous high-efficiency.
Claims (1)
1. the method for denitrification anaerobic ammonia oxidation SBR process high concentration nitrate waste water and municipal effluent, is characterized in that, first cultivates incomplete denitrifying bacteria and anaerobic ammonia oxidizing bacteria respectively, then tames the symbiosis flora of denitrification anaerobic ammonia oxidation, and method comprises the following steps:
Step one: inoculation denitrification mud is in denitrification anaerobic ammonia oxidation sbr reactor device, and control the rear sludge concentration 2000 ~ 3500mg/L of inoculation, sludge age is 30 ~ 50 days; Nitrate wastewater is collected in high concentration nitrate waste water water tank (1), and its nitrate nitrogen concentration is 300 ~ 700mg/L, and nitrate wastewater enters denitrification anaerobic ammonia oxidation sbr reactor device by the first peristaltic pump (1.1); Municipal effluent in municipal effluent water tank (2) enters in denitrification anaerobic ammonia oxidation sbr reactor device by the second peristaltic pump (2.1), and controlling initial COD in reactor is 2.0 ~ 3.5 with the ratio of nitrate nitrogen mass concentration; Anoxia stirring denitrification 60min ~ 180min after each cycle water inlet, 60min ~ 120min is staticly settled after stirring terminates, after precipitation terminates, supernatant liquor is discharged, draining ratio is 20% ~ 60%, until water outlet nitrite accumulation rate is 80% ~ 100%, complete incomplete denitrification culturing sludge process; When water outlet nitrite accumulation rate lower than 80% time, by reducing initial COD and the ratio of nitrate nitrogen mass concentration in 2.0 ~ 3.5 scopes, make water outlet nitrite accumulation rate be 80% ~ 100%;
Step 2: inoculation anaerobic ammonium oxidation sludge is in another sbr reactor device, and make sludge concentration in reactor be 1000 ~ 2500mg/L, sludge age is 40 ~ 60 days; Sewage containing ammonia nitrogen and nitrite nitrogen is entered in denitrification anaerobic ammonia oxidation sbr reactor device by peristaltic pump, and wherein the ratio of ammonia nitrogen and nitrite nitrogen concentration is 1:1.32, anoxia stirring after each cycle water inlet, sedimentation and drawing, and draining ratio is 20% ~ 60%; Temperature controls between 27 DEG C ~ 33 DEG C; Until water outlet nitrogen removal rate is greater than 70%, complete anaerobic ammonium oxidation sludge culturing process;
Step 3: the anaerobic ammonium oxidation sludge described in step 2 and incomplete denitrification mud are inoculated into another set of denitrification anaerobic ammonia oxidation sbr reactor device by sludge concentration than for 2.5:1 ~ 4:1, controlling sludge concentration in inoculation post-reactor is 1500mg/L ~ 3500mg/L, and sludge age is 40 ~ 60 days;
Step 4: the municipal effluent after inoculation in municipal effluent water tank (2) enters into denitrification anaerobic ammonia oxidation sbr reactor device for 5:1 ~ 10:1 by the second peristaltic pump (2.1) and the nitrate wastewater in high concentration nitrate waste water water tank (1) by volume by the first peristaltic pump (1.1); Anoxia stirring 4 ~ 7h after water inlet; Precipitation 30 ~ 60min, discharge supernatant liquor, draining ratio is 40% ~ 60%.
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| JP2001149981A (en) * | 1999-12-01 | 2001-06-05 | Hitachi Kiden Kogyo Ltd | Method for treating sewage and sludge |
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| CN102303938A (en) * | 2011-07-28 | 2012-01-04 | 广东省微生物研究所 | Combined process for building partial nitrosation-anaerobic ammonium oxidation garbage percolate |
| CN103539317B (en) * | 2013-10-28 | 2015-06-17 | 北京工业大学 | Device and method for nitrogen and phosphorus removal treatment by denitrification on high-ammonia nitrogen anaerobic ammonia oxidation effluent and domestic sewage |
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