CN103058461B - Municipal sewage partial nitrification and anaerobic ammonia oxidation denitrification method capable of enhancing energy recuperation - Google Patents
Municipal sewage partial nitrification and anaerobic ammonia oxidation denitrification method capable of enhancing energy recuperation Download PDFInfo
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Abstract
The invention relates to a municipal sewage partial nitrification and anaerobic ammonia oxidation denitrification method capable of enhancing energy recuperation, and belongs to the field of sewage treatment. According to the invention, municipal sewage enters a biosorption reactor at first, organic matter in the sewage is absorbed into activated sludge through the absorption effect of the activated sludge, then the municipal sewage enters an SBR (Sequencing Batch Reactor Activated Sludge Process) reactor, and through the alternate operation of low oxygen aeration and anaerobic agitation, the autotrophic nitrogen removal of the partial nitrification and the anaerobic ammonia oxidation is realized, so that the energy recuperation efficiency of the sewage treatment is improved, and the operation energy consumption of the sewage treatment is lowered.
Description
Technical field
The present invention relates to a kind of municipal effluent short distance nitration of strengthening energy recovery+Anammox denitrogenation method, belong to the dirty water living creature processing technique field.
Background technology
In municipal effluent, organism is not only pollutent, can also be regarded as the carrier of energy, because can produce methane by anaerobically fermenting, changes the organism in water into energy substance methane.Present traditional nitration denitrification biological denitrification process of using of municipal wastewater treatment plant need to utilize that in sewage, organism carries out biological denitrificaion as denitrifying carbon source, therefore just makes to be used for methanogenic organism amount in sewage and to reduce.The discovery of anaerobic ammonia oxidizing bacteria makes bio-denitrifying sewage need not organism, makes in sewage that organism is as much as possible produces methane for anaerobically fermenting, thereby can improve energy recovery rate in municipal effluent.The research of Anammox technology at present mainly concentrates on high ammonia-nitrogen wastewater with application and processes, and is applied to the fewer of municipal sewage treatment.
In common pulling flow type municipal effluent denitrification system, induce reaction speed or reactor time of water quality fluctuating temperature changes, and the hydraulic detention time of system is certain, therefore the waste that finishes still to continue the situation of aeration and cause energy may occur reacting, or react insufficient and cause effluent quality to worsen.The sbr reactor device at system volume one regularly can be controlled reaction process by the adjust operation time, therefore can effectively avoid aeration, can stablize effluent quality simultaneously.
Summary of the invention
Purpose of the present invention is exactly for the existing problem that the municipal sewage treatment energy consumption is high, stable water outlet is poor, a kind of municipal effluent short distance nitration of strengthening energy recovery+Anammox denitrogenation method and device proposed, at first the method and device are enriched to mud with the organism in sewage by the biological adsorption effect, then this sludge anaerobic fermentation to produce methane is improved energy recovery rate in sewage; Then sewage carries out autotrophic denitrification by the short distance nitration Anammox.
The objective of the invention is to solve by following solution: the municipal effluent short distance nitration of reinforcement energy recovery+Anammox nitrogen rejection facility is characterized in that: be provided with municipal effluent raw water box 1, biological adsorption reactor 2, second pond 3, intermediate water tank 4, sbr reactor device 5; Municipal effluent raw water box 1 is provided with upflow tube 1.1 and blow-down pipe 1.2; Municipal effluent raw water box 1 is connected with biological adsorption reactor 2 water inlet pipes by intake pump 2.1; Biological adsorption reactor 2 is for being divided into several lattice chambers, connects each lattice chambers according to the water (flow) direction flowing hole that is crisscross arranged up and down, be provided with air compressor machine 2.7, gas meter 2.6, air volume regulating valve 2.5, with aeration head 2.3; Biological adsorption reactor 2 is connected with second pond 3 by second pond pipe connecting 2.4; Second pond 3 is connected with biological adsorption reactor 2 water inlet pipes by sludge reflux pump 2.2; Second pond 3 rising pipes are connected with intermediate water tank 4; Intermediate water tank 4 is provided with upflow tube 4.1 and blow-down pipe 4.2; Intermediate water tank 4 is connected with sbr reactor device 5 water inlet pipes by SBR intake pump 5.1; Sbr reactor device 5 is provided with aeration head 5.4, agitator 5.5, mud valve 5.3 and water discharge valve 5.6.
The treatment scheme of municipal effluent in this device is: municipal effluent enters the biological adsorption reactor together with the second pond returned sluge, by the activated sludge absorption effect with the Adsorption of Organic in water to active sludge, thereby reach, organism in water is enriched to purpose in mud; The water outlet of biological adsorption reactor enters intermediate water tank and carries out the water quality and quantity adjusting; The sewage of intermediate water tank to the water inlet of sbr reactor device, utilizes organism remaining in mud and sewage as carbon source by sbr reactor device intake pump during intaking, and it is nitrogen with the nitrate-nitrogen reduction in the sbr reactor device that denitrification occurs; Then sbr reactor device hypoxemia operation is NO with the part mineralized nitrogen
- 2-N, then with anoxia stirring operation, by the Anammox effect with ammonia nitrogen and NO
- 2-N is converted into nitrogen; Hypoxemia/anoxic alternate run again, repeat above effect subsequently; Finally reach the purpose that nitrogen is removed from sewage.
The concrete startup of the municipal effluent short distance nitration of reinforcement energy recovery+Anammox denitrogenation method is as follows with the regulation and control step:
1) startup system: inoculation municipal wastewater treatment plant active sludge adds to biological adsorption reactor 2, makes sludge concentration reach 1500-4000mg/L; With short distance nitration mud with add to sbr reactor device 5 after Anammox mud mixes, making aerobic ammonia oxidation speed and Anammox speed ratio is 0.8:1-1.2:1, and makes sludge concentration reach 3000-6000mg/L; Simultaneously add Powdered Activated Carbon 500-2000mg/L to sbr reactor device 5;
When 2) moving, adjustment operation is as follows:
2.1) biological adsorption reactor 2 return sludge ratios are controlled at 50-100%; The aerobic zone Dissolved Oxygen concentration Control is at 0.5-2.0mg/L; The hydraulic detention time HRT of this reactor 2 is controlled at 20-60min; Sludge age is controlled at 1-3 days;
2.2) sbr reactor device 5 operation scheme are, at first 10-30min is stirred in water inlet simultaneously, then for stirring 15-30min, hypoxemia replaces with anoxia stirring 10-90min, adjust aeration rate and make dissolved oxygen concentration be 0.15-0.3mg/L when hypoxemia stirring for the first time, keep aeration rate constant when then hypoxemia stirs; Finish aeration when dissolved oxygen concentration rises to 0.5mg/L when hypoxemia stirs; Anoxia stirring 10-90min more at last, quiescent setting 5-60min then is at last by the water discharge valve draining;
2.3) sbr reactor device 5, if nitrous acid oxygen nitrogen concentration when anoxia stirring finishes〉0.5mg/L, increase the anoxia stirring time, until nitrous acid oxygen nitrogen concentration＜0.5mg/L.
The municipal effluent autotrophic denitrification method of energy recovery in enhanced sewage of the present invention, compare with existing traditional biological denitrification process and have following advantage:
1) by the sludge absorption effect with organism enrichment in sewage, lowly as far as possible utilize the organism in sewage to produce energy substance methane, thereby improve the rate of recovery of energy in sewage.
2) hypoxia short distance nitrated with Anammox alternate run repeatedly, reduce reactor nitrite concentration, thereby avoided the anaerobic ammonia oxidizing bacteria activity to be suppressed.
3) the nitrated reduction that can realize aeration rate of hypoxia short distance, thus the Sewage Plant energy consumption reduced.
4) short distance nitration Anammox autotrophic denitrification with inorganic carbon as carbon source, simultaneously in the anaerobic ammonia oxidizing bacteria metabolic process without N
2O generates, so the greenhouse gas emission of this technique is few.
Description of drawings
Fig. 1 is the structural representation of the present invention's municipal effluent short distance nitration of strengthening energy recovery+Anammox nitrogen rejection facility.
In figure, 1 is that municipal effluent raw water box, 2 is that biological adsorptive reactor, 3 is that second pond, 4 is that intermediate water tank, 5 is the sbr reactor device; 1.1 be upflow tube, 1.2 is blow-down pipe; 2.1 be biological adsorptive reactor intake pump, 2.2 is biological adsorptive reactor return sludge pump, 2.3 is aeration head, and 2.4 is the second pond pipe connecting, and 2.5 is air volume regulating valve, and 2.6 is gas meter, and 2.7 is air compressor machine; 3.1 be biological adsorptive reactor returned sluge tube valve, 3.2 is the shore pipe valve; 4.1 be upflow tube, 4.2 is blow-down pipe; 5.1 be the SBR intake pump, 5.2 is sbr reactor device water inlet pipe valve, 5.3 is the spoil disposal pipe valve, and 5.4 is aeration head, and 5.5 is agitator, and 5.6 is water discharge valve.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples: strengthen as shown in Figure 1 the municipal effluent short distance nitration of energy recovery+Anammox nitrogen rejection facility and be provided with municipal effluent raw water box 1, biological adsorption reactor 2, second pond 3, intermediate water tank 4, sbr reactor device 5; Municipal effluent raw water box 1 is provided with upflow tube 1.1 and blow-down pipe 1.2; Municipal effluent raw water box 1 is connected with biological adsorption reactor 2 water inlet pipes by intake pump 2.1; Biological adsorption reactor 2 is for being divided into several lattice chambers, connects each lattice chambers according to the water (flow) direction flowing hole that is crisscross arranged up and down, be provided with air compressor machine 2.7, gas meter 2.6, air volume regulating valve 2.5, with aeration head 2.3; Biological adsorption reactor 2 is connected with second pond 3 by second pond pipe connecting 2.4; Second pond 3 is connected with biological adsorption reactor 2 water inlet pipes by sludge reflux pump 2.2; Second pond 3 rising pipes are connected with intermediate water tank 4; Intermediate water tank 4 is provided with upflow tube 4.1 and blow-down pipe 4.2; Intermediate water tank 4 is connected with sbr reactor device 5 water inlet pipes by SBR intake pump 5.1; Sbr reactor device 5 is provided with aeration head 5.4, agitator 5.5, mud valve 5.3 and water discharge valve 5.6.
Test adopts Beijing University of Technology's dependents' district sanitary sewage as former water, and concrete water quality is as follows: COD concentration is 110-230mg/L; NH+ 4-N concentration is 63-94mg/L, NO-2-N≤0.5mg/L, NO-3-N≤0.5mg/L.Pilot system as shown in Figure 1, each reactor all adopts synthetic glass to make, biological adsorption reactor effective volume is 16L, is divided into 2 lattice chambers; Sbr reactor device useful volume is 12L.
Concrete operation is as follows:
1) startup system: inoculation municipal wastewater treatment plant active sludge adds to biological adsorption reactor 2, makes sludge concentration reach 2500mg/L; With short distance nitration mud with add to sbr reactor device 5 after Anammox mud mixes, making aerobic ammonia oxidation speed and Anammox speed ratio is 0.8:1-1.2:1, and makes sludge concentration reach 5000mg/L; Simultaneously add Powdered Activated Carbon 500mg/L to sbr reactor device 5;
When 2) moving, adjustment operation is as follows:
2.1) biological adsorption reactor 2 return sludge ratios are controlled at 50%; The aerobic zone Dissolved Oxygen concentration Control is at 0.5-2.0mg/L; The hydraulic detention time HRT of this reactor 2 is controlled at 60min; Sludge age is controlled at 2-3 days;
2.2) sbr reactor device 5 operation scheme are, at first 10min is stirred in water inlet simultaneously, then for hypoxemia stirs 15min and anoxia stirring 90min alternately, adjust aeration rate and make dissolved oxygen concentration be 0.15-0.3mg/L when hypoxemia stirs for the first time, when then hypoxemia stirs, the maintenance aeration rate is constant; Finish aeration when dissolved oxygen concentration rises to 0.5mg/L when hypoxemia stirs; Anoxia stirring 90min more at last, quiescent setting 30min then is at last by the water discharge valve draining;
2.3) sbr reactor device 5, if nitrous acid oxygen nitrogen concentration when anoxia stirring finishes〉0.5mg/L, increase the anoxia stirring time, until nitrous acid oxygen nitrogen concentration＜0.5mg/L.
Test-results shows: after stable, biological adsorption reactor effluent COD concentration is 40-60mg/L, NH+ 4-N concentration 45-78mg/L, and NO-2-N concentration is 0.1-3.0mg/L, NO-3-N concentration 0.1-1.5mg/L; Short distance nitration anaerobic ammonia oxidation reactor effluent COD concentration is 35-65mg/L, NH+ 4-N concentration 1-11mg/L, and NO-2-N concentration is 0-1.5mg/L, NO-3-N concentration 1.0-6.5mg/L, TN is lower than 15mg/L.
Claims (1)
1. the municipal effluent short distance nitration of strengthening energy recovery+Anammox denitrogenation method, it is characterized in that, use as lower device: be provided with municipal effluent raw water box (1), biological adsorption reactor (2), second pond (3), intermediate water tank (4), sbr reactor device (5); Municipal effluent raw water box (1) is provided with upflow tube (1.1) and blow-down pipe (1.2); Municipal effluent raw water box (1) is connected with biological adsorption reactor (2) water inlet pipe by intake pump (2.1); Biological adsorption reactor (2) is divided into several lattice chambers, connects each lattice chambers according to the water (flow) direction flowing hole that is crisscross arranged up and down, be provided with air compressor machine (2.7), gas meter (2.6), air volume regulating valve (2.5), with aeration head (2.3); Biological adsorption reactor (2) is connected with second pond (3) by second pond pipe connecting (2.4); Second pond (3) is connected with biological adsorption reactor (2) water inlet pipe by sludge reflux pump (2.2); Second pond (3) rising pipe is connected with intermediate water tank (4); Intermediate water tank (4) is provided with upflow tube (4.1) and blow-down pipe (4.2); Intermediate water tank (4) is connected with sbr reactor device (5) water inlet pipe by SBR intake pump (5.1); Sbr reactor device (5) is provided with aeration head (5.4), agitator (5.5), mud valve (5.3) and water discharge valve (5.6);
The step of method is:
1) startup system: inoculation municipal wastewater treatment plant active sludge adds to biological adsorption reactor (2), makes sludge concentration reach 1500-4000mg/L; With short distance nitration mud with add to sbr reactor device (5) after Anammox mud mixes, making aerobic ammonia oxidation speed and Anammox speed ratio is 0.8:1-1.2:1, and makes sludge concentration reach 3000-6000mg/L; Simultaneously add Powdered Activated Carbon 500-2000mg/L to sbr reactor device (5);
When 2) moving, adjustment operation is as follows:
2.1) biological adsorption reactor (2) return sludge ratio is controlled at 50-100%; The aerobic zone Dissolved Oxygen concentration Control is at 0.5-2.0mg/L; The hydraulic detention time HRT of this reactor (2) is controlled at 20-60min; Sludge age is controlled at 1-3 days;
2.2) sbr reactor device (5) operation scheme is, at first 10-30min is stirred in water inlet simultaneously, then for stirring 15-30min, hypoxemia replaces with anoxia stirring 10-90min, adjusting aeration rate when hypoxemia for the first time stirs, to make dissolved oxygen concentration be 0.15-0.3mg/L, keeps aeration rate constant when then hypoxemia stirs; Finish aeration when dissolved oxygen concentration rises to 0.5mg/L when hypoxemia stirs; Anoxia stirring 10-90min more at last, quiescent setting 5-60min then is at last by the water discharge valve draining;
2.3) sbr reactor device (5), if nitrous acid oxygen nitrogen concentration when anoxia stirring finishes〉0.5mg/L, increase the anoxia stirring time, until nitrous acid oxygen nitrogen concentration＜0.5mg/L.
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| CN102786142A (en) * | 2012-07-24 | 2012-11-21 | 北京工业大学 | Device and method for partial nitrosation of low carbon municipal sewage |
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