CN102101746B - Low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal device and method - Google Patents
Low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal device and method Download PDFInfo
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Abstract
The invention discloses a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal device and a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal method. The device comprises a raw water tank, a biological phosphorus removal and half shortcut nitrification reactor, a secondary sedimentation tank, an intermediate water tank and an anammox reactor, wherein the biological phosphorus removal and half shortcut nitrification reactor is a university of cape town (UCT) reactor without internal returning of digestive fluid; the secondary secondary sedimentation tank is a radial-flow sedimentation tank; and the anammox reactor is an upflow anaerobic sludge blanket (UASB) reactor. The method comprises: introducing urban sewage first to the anaerobic zone of the biological phosphorus removal and half shortcut nitrification reactor for phosphorus release, then to an anoxic zone of the biological phosphorus removal and half shortcut nitrification reactor for denitrification and phosphorus absorption and finally to an aerobic zone for aerobic phosphorus absorption and half shortcut nitrification; subjecting mixed liquid containing ammonia nitrogen and nitrite nitrogen to sludge and water separation in the secondary sedimentation tank; and introducing the water to the anammox UASB reactor for autotrophic biological nitrogen removal under anammox action. When the method is used, process aeration can be reduced, energy consumption can be reduced, and carbon source is saved. The method is suitable for treating low-carbon sewage.
Description
Technical field
The present invention relates to a kind of dirty water living creature processing technique, specifically is through polyP bacteria the phosphorus in the sewage to be removed, and through short distance nitration+Anammox technology the ammonia nitrogen in the sewage is converted into nitrogen, thereby reaches the purpose of denitrification of autotrophic organism.
Background technology
Existing municipal wastewater treatment plant all is to utilize the traditional biological denitrification dephosphorization technique; Carbon source there is certain demand; Because anaerobic phosphorus release process need organic carbon source; The denitrification denitrogenation process also needs organic carbon source, but the municipal effluent that has but is low-carbon (LC) water quality, and promptly contained organic carbon source can not satisfy the demand of traditional biological denitrogenation dephosphorizing.Country improves constantly the sewerage nitrogen and phosphor emission standard in order to control body eutrophication, and this just causes some water factory for qualified discharge; Have to add outer carbon source; Like industrial spirit etc., when improving water factory's working cost, also increased sludge yield; Increase the generation of carbonic acid gas in the treating processes, do not met the aim of low-carbon economy, recycling economy.
The appearance of short distance nitration+Anammox technology makes biological denitrificaion need not organic carbon source; Be fit to the processing of low-carbon (LC) high ammonia-nitrogen wastewater; And the appearance of engineering example is being arranged aspect the processing of sludge digestion liquid, but do not seeing of the application of this technology so far at municipal wastewater treatment plant.Short distance nitration+Anammox technology then can reduce the energy consumption that sewage work's aeration is consumed if can arriving in municipal sewage treatment use, and reduces the required expense of sludge treatment, reduces the discharging of the greenhouse gases in the sewage treatment process.
Summary of the invention
The object of the invention is exactly the apparatus and method that propose a kind of low-carbon (LC) municipal effluent biological phosphate-eliminating and denitrification of autotrophic organism.
Technical scheme of the present invention is: the device of a kind of low-carbon (LC) municipal effluent biological phosphate-eliminating and denitrification of autotrophic organism is provided, has been provided with former water tank 1, biological phosphate-eliminating half short distance nitration reactor drum 2, second pond 3, intermediate water tank 4 and Anammox UASB reactor drum 5; Said raw water box 1 is a uncovered casing, is provided with upflow tube 1.1 and blow-down pipe 1.2; Raw water box 1 is connected with water intaking valve 2.2 through intake pump 2.1;
Said biological phosphate-eliminating half short distance nitration reactor drum 2 is a uncovered pond body, is divided into several lattice chambers, connects each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down; Front end is anaerobic zone lattice chambers; Be provided with whisking appliance 2.8, follow, also be provided with whisking appliance 2.7 by lattice chamber, oxygen-starved area; Be aerobic zone lattice chambers at last, its bottom is provided with aeration head 2.5; Air compressor machine 2.10 is connected with the aeration head that is located at reactor bottom 2.5 through gas meter 2.9, air volume regulating valve 2.6; Lattice chamber, oxygen-starved area is connected with water intaking valve 2.2 through internal reflux pump 2.3; Lattice chamber, oxygen-starved area is connected with second pond mud reverse flow valve 3.1 through sludge reflux pump 2.4; Biological phosphate-eliminating half short distance nitration reactor drum 2 is connected with municipal effluent second pond 3 through second pond pipe connecting 3.3;
Said second pond 3 is the radical sedimentation basin of middle water inlet, is connected with intermediate water tank 4 through second pond rising pipe 3.4;
Said intermediate water tank 4 is a uncovered casing, is provided with intermediate water tank upflow tube 4.1 and intermediate water tank blow-down pipe 4.2; Intermediate water tank 4 is connected with UASB reactor drum water intaking valve 5.2 through UASB reactor drum intake pump 5.1;
Said anaerobic ammonia oxidation reactor 5 is a UASB reactor drum; The bottom is provided with UASB reactor drum water intaking valve 5.2 and UASB reactor drum mud valve 5.3; Equidistantly set gradually several UASB reactor drum sampling valves 5.4 from the bottom up, top is provided with triphase separator 5.5, UASB reactor drum rising pipe 5.6 and the UASB reactor drum pipe valve 5.7 of giving vent to anger.
The method of low-carbon (LC) municipal effluent biological phosphate-eliminating provided by the invention and denitrification of autotrophic organism may further comprise the steps:
1) active sludge that will take from urban sewage plant aeration tank is added to biological phosphate-eliminating half short distance nitration reactor drum 2 and second pond 3, and making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; Municipal effluent is added raw water box 1, start intake pump 2.1, get into biological phosphate-eliminating half short distance nitration reactor drum 2 through water intaking valve 2.2; Start anaerobic zone whisking appliance 2.8, oxygen-starved area whisking appliance 2.7, air compressor machine 2.10, regulate air volume regulating valve 2.6 and make that aerobic zone dissolved oxygen DO is 0.3-0.8mg/L; Start sludge reflux pump 2.4 and internal reflux pump 2.3, return sludge ratio is 50%-100%, and internal reflux ratio is 100%-300%;
The anaerobic ammonium oxidation granular sludge that 2) will have an excellent activity adds to anaerobic ammonia oxidation reactor 5, and the seed sludge amount accounts for the 1/4-1/3 of anaerobic ammonia oxidation reactor 5 TVs; Hydraulic detention time HRT is 0.1-3h;
3) biological phosphate-eliminating half short distance nitration reactor drum 2 sludge age SRT are controlled to be 6-15d; The anaerobic zone hydraulic detention time is 0.5-1.5h, and the oxygen-starved area hydraulic detention time is 0.5-1.5h, and the aerobic zone hydraulic detention time is 1-3h;
4), make aerobic zone water outlet
be 1.2-1.4 through the DO (in the 0.3-0.8mg/L scope) of adjustment biological phosphate-eliminating half short distance nitration reactor drum 2 aerobic zones; During as
; Reduce DO through reducing aeration rate; During as
, increase aeration rate and improve DO;
Know-why:
The low-carbon (LC) municipal effluent gets into biological phosphate-eliminating half short distance nitration reactor drum anaerobic zone generation anaerobic phosphorus release effect; Then getting into the oxygen-starved area utilizes the nitrite nitrogen in the returned sluge to carry out anoxic suction phosphorus; Get into aerobic zone subsequently aerobic suction phosphorus and short distance nitration take place; Through adjustment dissolved oxygen concentration control water outlet
is 1.2-1.4; Then get into Anammox UASB reactor drum, the Anammox effect takes place ammonia nitrogen and nitrite nitrogen are converted into nitrogen.The technology key be through control dissolved oxygen concentration be 0.3-0.8mg/L; Combine the control of sludge age SRT simultaneously; Realize the rate of rise of the rate of rise of ammonia oxidation bacteria (AOB), thereby realize NOB is eluriated, realize stable short distance nitration greater than nitrite nitrogen oxidation bacterium (NOB).
Low-carbon (LC) municipal effluent biological phosphate-eliminating of the present invention and denitrification of autotrophic organism apparatus and method are with existing A
2The O biological denitrification phosphorous removal technique is compared has following advantage:
1) half short distance nitration promptly only has the part ammonia nitrogen to be converted into nitrite nitrogen, saves at short distance nitration on the basis of aeration rate, further saves aeration rate, thereby reduces more energy consumption;
2) Anammox replaces denitrification, and anaerobic ammonia oxidizing bacteria to be autotrophic bacteria need not organic carbon source, therefore can save adding of outer carbon source, reduce working cost, the while can also reduce discharge of carbon dioxide greenhouse gas;
3) anaerobic ammonia oxidizing bacteria is an autotrophic bacteria, and multiplication rate is slow, and therefore sludge output is few, and then has reduced the sludge disposal expense;
4) anaerobic ammonia oxidizing bacteria is compared with denitrifying bacteria, and it is higher that attainable TN removes volumetric loading, can reduce floor space significantly;
5) mud is back to the oxygen-starved area; Make the nitrite nitrogen that carries in the mud utilized by the denitrification phosphorus-collecting bacterium; The growth of intensified anti-nitrated polyP bacteria, thus the influence of nitrite reduced to anaerobic phosphorus release and aerobic suction phosphorus, help improving the stability of biological phosphate-eliminating.
Description of drawings
Fig. 1 is the structural representation of low-carbon (LC) municipal effluent biological phosphate-eliminating of the present invention and denitrification of autotrophic organism device.
Among the figure, 1 is former water tank; 2 is biological phosphate-eliminating half short distance nitration reactor drum; 3 is second pond; 4 is intermediate water tank; 5 is Anammox UASB reactor drum; 1.1 be former water tank upflow tube; 1.2 be former water tank blow-down pipe; 2.1 be intake pump; 2.2 be water intaking valve; 2.3 be the internal reflux pump; 2.4 be sludge reflux pump; 2.5 be aeration head; 2.6 be air volume regulating valve; 2.7 be the oxygen-starved area whisking appliance; 2.8 be the anaerobic zone whisking appliance; 2.9 be gas meter; 2.10 be air compressor machine; 3.1 be second pond mud reverse flow valve; 3.2 be the excess sludge discharge valve; 3.3 be the second pond pipe connecting; 3.4 be the second pond rising pipe; 3.5 be biological phosphate-eliminating half short distance nitration reactor drum outlet valve; 4.1 be the intermediate water tank upflow tube; 4.2 be the intermediate water tank blow-down pipe; 5.1 be UASB reactor drum intake pump; 5.2 be UASB reactor drum water intaking valve; 5.3 be UASB reactor drum mud valve; 5.4 be UASB reactor drum sampling valve; 5.5 be triphase separator; 5.6 be UASB reactor drum rising pipe; 5.7 be the UASB reactor drum pipe valve of giving vent to anger.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further specified: as shown in Figure 1, low-carbon (LC) municipal effluent biological phosphate-eliminating and denitrification of autotrophic organism device are provided with former water tank 1, biological phosphate-eliminating half short distance nitration reactor drum 2, second pond 3, intermediate water tank 4 and Anammox UASB reactor drum 5; Said raw water box 1 is a uncovered casing, is provided with upflow tube 1.1 and blow-down pipe 1.2; Raw water box 1 is connected with water intaking valve 2.2 through intake pump 2.1;
Said biological phosphate-eliminating half short distance nitration reactor drum 2 is a uncovered pond body, is divided into several lattice chambers, connects each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down; Front end is anaerobic zone lattice chambers; Be provided with whisking appliance 2.8, follow, also be provided with whisking appliance 2.7 by lattice chamber, oxygen-starved area; Be aerobic zone lattice chambers at last, its bottom is provided with aeration head 2.5; Air compressor machine 2.10 is connected with the aeration head that is located at reactor bottom 2.5 through gas meter 2.9, air volume regulating valve 2.6; Lattice chamber, oxygen-starved area is connected with water intaking valve 2.2 through internal reflux pump 2.3; Lattice chamber, oxygen-starved area is connected with second pond mud reverse flow valve 3.1 through sludge reflux pump 2.4; Biological phosphate-eliminating half short distance nitration reactor drum 2 is connected with municipal effluent second pond 3 through second pond pipe connecting 3.3;
Said second pond 3 is the radical sedimentation basin of middle water inlet, is connected with intermediate water tank 4 through rising pipe 3.4;
Said intermediate water tank 4 is a uncovered casing, is provided with upflow tube 4.1 and blow-down pipe 4.2; Intermediate water tank 4 is connected with anaerobic ammonia oxidation reactor water intaking valve 5.2 through UASB intake pump 5.1;
Said anaerobic ammonia oxidation reactor 5 is a UASB reactor drum, and the bottom is provided with mud return line valve 5.2 and spoil disposal pipe valve 5.3, equidistantly sets gradually several sampling valves 5.4 from the bottom up, and top is provided with triphase separator 5.5, rising pipe 5.6 and gives vent to anger pipe valve 5.7;
Concrete test water is taken from the municipal wastewater treatment plant preliminary sedimentation tank water outlet of Gaobeidian City, Beijing; Concrete water-quality guideline is following: COD is 112-205mg/L;
is 45-62mg/L,
SS be 60-138mg/L; TP is 3.5-8.0mg/L; Basicity is 250-400mg/L; PH is 7.00-7.60.Pilot system is as shown in Figure 1, and biological phosphate-eliminating half short distance nitration reactor drum useful volume is 25L, and reactor size is L * B * H=50 * 10 * 60cm, is equally divided into 5 lattice chambers, and lattice interventricular septum plate is connected by staggered up and down aperture.
Concrete operation is following:
1) active sludge that will take from urban sewage plant aeration tank is added to biological phosphate-eliminating half short distance nitration reactor drum 2 and second pond 3, and making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; Municipal effluent is added raw water box 1, start intake pump 2.1, get into biological phosphate-eliminating half short distance nitration reactor drum 2 through water intaking valve 2.2; Start anaerobic zone whisking appliance 2.8, oxygen-starved area whisking appliance 2.7, air compressor machine 2.10, regulate air volume regulating valve 2.6 and make that aerobic zone dissolved oxygen DO is 0.3-0.8mg/L; Start sludge reflux pump 2.4 and internal reflux pump 2.3, return sludge ratio is 50%-100%, and internal reflux ratio is 100%-300%;
The anaerobic ammonium oxidation granular sludge that 2) will have an excellent activity adds to anaerobic ammonia oxidation reactor 5, and the seed sludge amount accounts for the 1/4-1/3 of anaerobic ammonia oxidation reactor 5 TVs; Hydraulic detention time HRT is 0.1-3h;
3) biological phosphate-eliminating half short distance nitration reactor drum 2 sludge age SRT are controlled to be 6-15d; The anaerobic zone hydraulic detention time is 0.5-1.5h, and the oxygen-starved area hydraulic detention time is 0.5-1.5h, and the aerobic zone hydraulic detention time is 1-3h;
4), make aerobic zone water outlet
be 1.2-1.4 through the DO (in the 0.3-0.8mg/L scope) of adjustment biological phosphate-eliminating half short distance nitration reactor drum 2 aerobic zones; During as
; Reduce DO through reducing aeration rate; During as
, increase aeration rate and improve DO;
Test-results shows: after system is stable; Biological phosphate-eliminating half short distance nitration reactor drum water outlet COD＜35mg/L;
is 1.2-1.4; TP＜1mg/L, the nitrite accumulation rate is greater than 75%; Anaerobic ammonia oxidation reactor water outlet TN is 8-14mg/L.
Claims (2)
1. the device of low-carbon (LC) municipal effluent biological phosphate-eliminating and denitrification of autotrophic organism is characterized in that: be provided with former water tank (1), biological phosphate-eliminating half short distance nitration reactor drum (2), second pond (3), intermediate water tank (4) and Anammox UASB reactor drum (5); Said raw water box (1) is a uncovered casing, is provided with upflow tube (1.1) and blow-down pipe (1.2); Raw water box (1) is connected with water intaking valve (2.2) through intake pump (2.1);
Said biological phosphate-eliminating half short distance nitration reactor drum (2) is a uncovered pond body, is divided into several lattice chambers, connects each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down; Front end is anaerobic zone lattice chambers; Be provided with whisking appliance (2.8), follow, also be provided with whisking appliance (2.7) by lattice chamber, oxygen-starved area; Be aerobic zone lattice chambers at last, its bottom is provided with aeration head (2.5); Air compressor machine (2.10) is connected with the aeration head that is located at reactor bottom (2.5) through gas meter (2.9), air volume regulating valve (2.6); Lattice chamber, oxygen-starved area is connected with water intaking valve (2.2) through internal reflux pump (2.3); Lattice chamber, oxygen-starved area is connected with second pond mud reverse flow valve (3.1) through sludge reflux pump (2.4); Biological phosphate-eliminating half short distance nitration reactor drum (2) is connected with municipal effluent second pond (3) through second pond pipe connecting (3.3);
Said second pond (3) is the radical sedimentation basin of middle water inlet, is connected with intermediate water tank (4) through second pond rising pipe (3.4);
Said intermediate water tank (4) is a uncovered casing, is provided with intermediate water tank upflow tube (4.1) and intermediate water tank blow-down pipe (4.2); Intermediate water tank (4) is connected with UASB reactor drum water intaking valve (5.2) through UASB reactor drum intake pump (5.1);
Said Anammox UASB reactor drum (5) is a UASB reactor drum; The bottom is provided with UASB reactor drum water intaking valve (5.2) and UASB reactor drum mud valve (5.3); Equidistantly set gradually several UASB reactor drum sampling valves (5.4) from the bottom up, top is provided with triphase separator (5.5), UASB reactor drum rising pipe (5.6) and the UASB reactor drum pipe valve (5.7) of giving vent to anger.
2. the device of low-carbon (LC) municipal effluent biological phosphate-eliminating according to claim 1 and denitrification of autotrophic organism, the method for realization municipal effluent biological phosphate-eliminating and denitrification of autotrophic organism, its characteristic comprises following content:
1) active sludge that will take from urban sewage plant aeration tank is added to biological phosphate-eliminating half short distance nitration reactor drum (2) and second pond (3), and making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; Municipal effluent is added raw water box (1), start intake pump (2.1), get into biological phosphate-eliminating half short distance nitration reactor drum (2) through water intaking valve (2.2); Start anaerobic zone whisking appliance (2.8), oxygen-starved area whisking appliance (2.7), air compressor machine (2.10), regulate air volume regulating valve (2.6) and make that aerobic zone dissolved oxygen DO is 0.3-0.8mg/L; Start sludge reflux pump (2.4) and internal reflux pump (2.3), return sludge ratio is 50%-100%, and internal reflux ratio is 100%-300%;
The anaerobic ammonium oxidation granular sludge that 2) will have an excellent activity adds to Anammox UASB reactor drum (5), and the seed sludge amount accounts for the 1/4-1/3 of Anammox UASB reactor drum (5) TV; Hydraulic detention time HRT is 0.1-3h;
3) biological phosphate-eliminating half short distance nitration reactor drum (2) sludge age SRT is controlled to be 6-15d; The anaerobic zone hydraulic detention time is 0.5-1.5h, and the oxygen-starved area hydraulic detention time is 0.5-1.5h, and the aerobic zone hydraulic detention time is 1-3h;
4) DO that passes through adjustment biological phosphate-eliminating half short distance nitration reactor drum (2) aerobic zone makes aerobic zone water outlet
be 1.2-1.4 in the 0.3-0.8mg/L scope; During as
; Reduce DO through reducing aeration rate; During as
, increase aeration rate and improve DO.
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| CN108975509A (en) * | 2018-08-17 | 2018-12-11 | 北京城市排水集团有限责任公司 | A kind of municipal sewage two stage treatment and advanced nitrogen coupling device and its application method |
| CN110002683A (en) * | 2019-04-24 | 2019-07-12 | 北京工业大学 | Handle the continuous flow A of moderate strength municipal sewage containing ammonia nitrogen2O couples UASB denitrification dephosphorization apparatus and method |
| CN114477652B (en) * | 2022-02-23 | 2023-10-31 | 中建生态环境集团有限公司 | Advanced treatment system and method for urban sewage |
| CN116573817B (en) * | 2023-07-13 | 2023-09-26 | 四川省建筑科学研究院有限公司 | Integrated mixed biological treatment system and method for dispersed sewage |
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