CN104528933A - Method for realizing continuous-flow city sewage autotrophic nitrogen removal based on FNA treatment of sludge - Google Patents
Method for realizing continuous-flow city sewage autotrophic nitrogen removal based on FNA treatment of sludge Download PDFInfo
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- CN104528933A CN104528933A CN201410713794.6A CN201410713794A CN104528933A CN 104528933 A CN104528933 A CN 104528933A CN 201410713794 A CN201410713794 A CN 201410713794A CN 104528933 A CN104528933 A CN 104528933A
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/307—Nitrification and denitrification treatment characterised by direct conversion of nitrite to molecular nitrogen, e.g. by using the Anammox process
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/001—Runoff or storm water
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Abstract
The invention discloses a method for realizing continuous-flow city sewage autotrophic nitrogen removal based on an FNA treatment of sludge. According to the invention, city sewage first enters an organic matter removing reactor, such that organic matters in the sewage are removed with a sludge absorption effect; discharged water enters an autotrophic nitrogen removing reactor, such that synchronous short-cut nitrification anaerobic ammonium oxidation autotrophic nitrogen removal is realized; sludge age is controlled by discharging residual sludge regularly everyday; active sludge is regularly treated by using free nitrous acid, such that nitrite oxidizing bacteria increase in the active sludge is controlled, and system stable short-cut nitrification is maintained; and continuous-flow city sewage autotrophic nitrogen removal is finally realized, and thus sludge treatment energy consumption is reduced.
Description
Technical field
The present invention relates to a kind of method realizing Continuous Flow municipal effluent autotrophic denitrification based on FNA lignin-sludge, belong to technical field of biological sewage treatment.
Background technology
The discovery of anaerobic ammonia oxidizing bacteria change people to ammonia can only could be oxidized under the condition of aerobic understanding.The sewage autotrophic denitrification that makes of Anammox reaction becomes possibility, and has been successfully applied to denitrogenation processing such as high-ammonia-nitrogen sewage such as digested sludge dehydration liquid, percolate etc. in recent years.Compared with traditional nitration denitrification denitrogenation technology, Anammox autotrophic denitrification oxygen requirement is low, makes system energy consumption lower; Without the need to organic carbon source, thus make the organism in sewage farthest for methane phase, the recovery utilization rate of energy in sewage can be improved.Dewater compared with the high-ammonia-nitrogen sewages such as liquid with digested sludge, the amount of municipal effluent is larger, if Anammox technology can be applied to municipal effluent denitrogenation, is then expected to significantly reduce municipal wastewater treatment plant energy consumption, improve Sewage Plant methane production simultaneously, and then improve methane generated energy.
The bottleneck that current restriction Anammox technology is applied in municipal sewage plant is that the substrate nitrite of Anammox reaction can not obtain stable supply.Think that the main path obtaining nitrite is, by ammonia oxidation bacteria, ammonia nitrogen in sewage is oxidized to nitrite at present, avoid nitrite to be oxidized to nitrate by NOB further simultaneously, namely realize short distance nitration.Continuous flow sewage treatment process is one of most widely used technique of current municipal wastewater treatment plant.Therefore in Continuous Flow urban sewage treatment process, control the control of NOB, and then realize the technology and method of municipal effluent short distance nitration Anammox autotrophic denitrification, municipal sewage plant's energy-saving and emission-reduction are had great importance.
Summary of the invention
Object of the present invention is exactly the bottleneck problem for realizing municipal effluent Anammox autotrophic denitrification, propose a kind of method realizing Continuous Flow municipal effluent autotrophic denitrification based on FNA lignin-sludge, first organism in municipal effluent removes by the method in organic matter removal reactor, then realizing synchronous short distance nitration Anammox by the mineralized nitrogen in sewage at self-supported denitrification reactor is nitrogen, reaches the object of sewage water denitrification; The key that present method realizes autotrophic denitrification adopts free nitrite (FNA) to carry out treating part returned sluge, NOB in selective inhibitory activity mud, thus control the growth metabolism of NOB, realize the accumulation of Nitrite In Polluted Water nitrate, namely avoid the oxidized nitrate of nitrite, finally reach and stabilize to the object that anaerobic ammonia oxidizing bacteria provides substrate nitrite.
The object of the invention is to be solved by following solution: floc sludge and granule sludge symbiosis realize municipal effluent autotrophic denitrification device and be provided with municipal effluent raw water box 1, organic matter removal reactor 2, intermediate sedimentation pond 3, self-supported denitrification reactor 4, second pond 5, sludge treatment reactor 6; 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 organic matter removal reactor 2 water inlet pipe by intake pump 2.1; Organic matter removal reactor 2 is divided into several lattice room, connects each lattice room according to the water (flow) direction flowing hole that is crisscross arranged up and down, is provided with aeration head 2.3, air compressor machine 2.7, gas meter 2.6 and air volume regulating valve 2.5; Organic matter removal reactor 2 is connected with intermediate sedimentation pond 3 by intermediate sedimentation pond pipe connecting 2.4; Intermediate sedimentation pond 3 is connected by the water inlet pipe of sludge reflux pump 2.2 with organic matter removal reactor 2; Intermediate sedimentation pond rising pipe 3.3 is connected with self-supported denitrification reactor water inlet pipe 4.1; Self-supported denitrification reactor 4 is divided into 7 lattice rooms, and oxygen-starved area 4.3 and aerobic zone 4.4 are alternately arranged, connect each lattice room according to the water (flow) direction flowing hole that is crisscross arranged up and down, oxygen-starved area is provided with agitator 4.6, and adds floating stuffing; Aerobic zone aerating system; Self-supported denitrification reactor 4 is connected with second pond 5 by second pond pipe connecting 4.7; Second pond 5 is connected with self-supported denitrification reactor 4 first lattice room by sludge reflux pump 4.5; Sludge reflux pump 4.5 and sludge treatment reactor enter mud pipe 6.5 and are connected; Sludge treatment reactor 6 is a uncovered pond body, be provided with blow-down pipe 6.1, mud add pump 6.2, chemical feed pipe 6.3, agitator 6.4 with enter mud pipe 6.5; Sludge treatment reactor 6 adds pump 6.2 by mud and is connected with self-supported denitrification reactor 4 first lattice room.
Municipal effluent treatment scheme is in this device: municipal effluent enters organic matter removal reactor together with the returned sluge of intermediate sedimentation pond, by the adsorption of active sludge by the Adsorption of Organic in water in mud; Then organic matter removal reactor water outlet enters self-supported denitrification reactor, utilize remaining a small amount of organism in water to carry out anti-nitration reaction first oxygen-starved area, follow-up aerobic zone finds ammoxidation, be nitrite by mineralized nitrogen, Anammox effect is there is in oxygen-starved area, ammonia nitrogen and nitrite nitrogen are converted into nitrogen, again repeat above effect subsequently; Finally reach the object removed from sewage by nitrogen.
Floc sludge and granule sludge symbiosis realize the method that municipal effluent autotrophic denitrification device realizes autotrophic denitrification, it is characterized in that comprising following content:
1) start up system: inoculation traditional wastewater treatment plant active sludge adds to organic matter removal reactor (2), makes sludge concentration be 2000-3000mg/L; The active sludge that inoculation has nitrification activity adds to self-supported denitrification reactor (4), makes its concentration reach 1500-3000mg/L; Oxygen-starved area to self-supported denitrification reactor adds biological suspended packing, and packing volume is than being 20-50%.
2) when running, adjustment operation is as follows:
2.1) sludge age of organic matter removal reactor (2) controls as 2-6 days, and aerobic zone Dissolved Oxygen concentration Control is 0.5-1.5mg/L, and return sludge ratio is 50-100%, and hydraulic detention time is 30-60min;
2.2) self-supported denitrification reactor (4) aerobic zone dissolved oxygen concentration is 0.3-0.8mg/L, and controlling sludge age by discharge excess sludge is 15-20 days;
2.3) self-supported denitrification reactor (4) sludge back flow quantity is 0.5-1.5 times of this reactor flooding quantity, and wherein the 5-10% of sludge reflux amount is delivered to sludge treatment reactor (6);
2.4) by adding Sodium Nitrite to sludge treatment reactor (6), nitrite nitrogen concentration in reactor is made to be 300-2000mg/L, and be 5.0-6.0 by adding pH in acid or alkali control sludge treatment reactor, sludge retention time is 12-24h.
The present invention is based on the method that FNA lignin-sludge realizes Continuous Flow municipal effluent autotrophic denitrification, compared with traditional nitration denitrification denitrogenation technique, there is following advantage:
1) autotrophic denitrification is without the need to organism, and the organism in municipal effluent can first be adsorbed in active sludge, is then used further to anaerobically fermenting methane phase, thus improves sewage work's production capacity.
2) achieve being separated of ammonia oxidation bacteria and anaerobic ammonia oxidizing bacteria, ammonia oxidation bacteria is mainly enriched in active sludge, and anaerobic ammonia oxidizing bacteria is then mainly enriched on floating stuffing, thus achieves the individual curing of ammonia oxidation bacteria.
3) short distance nitration Anammox denitride technology oxygen requirement is low, and sewage disposal energy consumption is low.
Accompanying drawing explanation
Fig. 1 the present invention is based on the structural representation that FNA lignin-sludge realizes Continuous Flow municipal effluent autotrophic denitrification device.
1 be municipal effluent raw water box, 2 be organic matter removal reactor in figure, 3 be intermediate sedimentation pond, 4 be self-supported denitrification reactor, 5 be second pond, 6 for sludge treatment reactor; 1.1 is upflow tube, and 1.2 is blow-down pipe; 2.1 be intake pump, 2.2 be sludge reflux pump, 2.3 be aeration head, 2.4 be intermediate sedimentation pond pipe connecting, 2.5 be air volume regulating valve, 2.6 be gas meter, 2.7 for air compressor machine; 3.1 is intermediate sedimentation pond returned sluge tube valve, and 3.2 is spoil disposal pipe valve, and 3.3 is intermediate sedimentation pond rising pipe; 4.1 be self-supported denitrification reactor water inlet pipe, 4.2 be reflux sludge tube, 4.3 be oxygen-starved area, 4.4 be aerobic zone, 4.5 be sludge reflux pump, 4.6 for agitator, 4.7 is second pond pipe connecting; 6.1 for sludge treatment reactor blow-down pipe, 6.2 for mud add pump, 6.3 for chemical feed pipe, 6.4 be agitator, 6.5 for entering mud pipe.
Embodiment
Below in conjunction with drawings and Examples, the present invention will be further described: as shown in Figure 1, and floc sludge and granule sludge symbiosis realize municipal effluent autotrophic denitrification device and be provided with municipal effluent raw water box (1), organic matter removal reactor (2), intermediate sedimentation pond (3), self-supported denitrification reactor (4), second pond (5), sludge treatment reactor (6); 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 organic matter removal reactor (2) water inlet pipe by intake pump (2.1); Organic matter removal reactor (2) is divided into several lattice room, connect each lattice room according to the water (flow) direction flowing hole that is crisscross arranged up and down, be provided with aeration head (2.3), air compressor machine (2.7), gas meter (2.6) and air volume regulating valve (2.5); Organic matter removal reactor (2) is connected with intermediate sedimentation pond (3) by intermediate sedimentation pond pipe connecting (2.4); Intermediate sedimentation pond (3) is connected by the water inlet pipe of sludge reflux pump (2.2) with organic matter removal reactor (2); Intermediate sedimentation pond rising pipe (3.3) is connected with self-supported denitrification reactor water inlet pipe (4.1); Self-supported denitrification reactor (4) is divided into 7 lattice rooms, oxygen-starved area (4.3) and aerobic zone (4.4) are alternately arranged, connect each lattice room according to the water (flow) direction flowing hole that is crisscross arranged up and down, oxygen-starved area is provided with agitator (4.6), and adds floating stuffing; Aerobic zone aerating system; Self-supported denitrification reactor (4) is connected with second pond (5) by second pond pipe connecting (4.7); Second pond (5) is connected with self-supported denitrification reactor (4) first lattice room by sludge reflux pump (4.5); Sludge reflux pump (4.5) and sludge treatment reactor enter mud pipe (6.5) and are connected; Sludge treatment reactor (6) is a uncovered pond body, be provided with blow-down pipe (6.1), mud add pump (6.2), chemical feed pipe (6.3), agitator (6.4) with enter mud pipe (6.5); Sludge treatment reactor (6) adds pump (6.2) by mud and is connected with self-supported denitrification reactor (4) first lattice room.
Test adopts certain community life sewage as former water, and concrete water quality is as follows: COD concentration is 150-320mg/L;
concentration is 52-80mg/L,
as shown in Figure 1, each reactor all adopts synthetic glass to make to pilot system, and organic matter removal reactor effective volume is 16L, is divided into 2 lattice rooms; Self-supported denitrification reactor useful volume is 10L; Sludge treatment reactor effective volume is 4L.
Carrying out practically operation is as follows:
1) start up system: inoculation traditional wastewater treatment plant active sludge adds to organic matter removal reactor (2), makes sludge concentration be 2000mg/L; The active sludge that inoculation has nitrification activity adds to self-supported denitrification reactor (4), makes its concentration reach 3000mg/L; Oxygen-starved area to self-supported denitrification reactor adds biological suspended packing, and packing volume ratio is 30%.
2) when running, adjustment operation is as follows:
2.1) sludge age of organic matter removal reactor (2) controls to be 3 days, and aerobic zone Dissolved Oxygen concentration Control is 0.5-1.0mg/L, and return sludge ratio is 50%, and hydraulic detention time is 60min;
2.2) self-supported denitrification reactor (4) aerobic zone dissolved oxygen concentration is 0.3-0.8mg/L, and controlling sludge age by discharge excess sludge is 15 days;
2.3) self-supported denitrification reactor (4) sludge back flow quantity is 0.5 times of this reactor flooding quantity, wherein 5% of sludge reflux amount is delivered to sludge treatment reactor (6);
2.4) by adding Sodium Nitrite to sludge treatment reactor (6), make nitrite nitrogen concentration in reactor be 300mg/L, and be 5.5-6.0 by adding pH in acid or alkali control sludge treatment reactor, sludge retention time is 20h.
Test-results shows: after stable, and organic matter removal reactor effluent COD concentration is 60-90mg/L,
concentration 50-75mg/L,
concentration is 0-2.5mg/L,
concentration 0-1.0mg/L; Self-supported denitrification reactor effluent COD concentration is 35-60mg/L,
concentration 0-8mg/L,
concentration is 0-1.5mg/L,
concentration 4.0-9.0mg/L.
Claims (1)
1. one kind realizes the method for Continuous Flow municipal effluent autotrophic denitrification based on FNA lignin-sludge, it is characterized in that, application is as lower device: be provided with municipal effluent raw water box (1), organic matter removal reactor (2), intermediate sedimentation pond (3), self-supported denitrification reactor (4), second pond (5), sludge treatment reactor (6); 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 organic matter removal reactor (2) water inlet pipe by intake pump (2.1); Organic matter removal reactor (2) is divided into several lattice room, connect each lattice room according to the water (flow) direction flowing hole that is crisscross arranged up and down, be provided with aeration head (2.3), air compressor machine (2.7), gas meter (2.6) and air volume regulating valve (2.5); Organic matter removal reactor (2) is connected with intermediate sedimentation pond (3) by intermediate sedimentation pond pipe connecting (2.4); Intermediate sedimentation pond (3) is connected by the water inlet pipe of sludge reflux pump (2.2) with organic matter removal reactor (2); Intermediate sedimentation pond rising pipe (3.3) is connected with self-supported denitrification reactor water inlet pipe (4.1); Self-supported denitrification reactor (4) is divided into 7 lattice rooms, oxygen-starved area (4.3) and aerobic zone (4.4) are alternately arranged, connect each lattice room according to the water (flow) direction flowing hole that is crisscross arranged up and down, oxygen-starved area is provided with agitator (4.6), and adds floating stuffing; Aerobic zone aerating system; Self-supported denitrification reactor (4) is connected with second pond (5) by second pond pipe connecting (4.7); Second pond (5) is connected with self-supported denitrification reactor (4) first lattice room by sludge reflux pump (4.5); Sludge reflux pump (4.5) and sludge treatment reactor enter mud pipe (6.5) and are connected; Sludge treatment reactor (6) is a uncovered pond body, be provided with blow-down pipe (6.1), mud add pump (6.2), chemical feed pipe (6.3), agitator (6.4) with enter mud pipe (6.5); Sludge treatment reactor (6) adds pump (6.2) by mud and is connected with self-supported denitrification reactor (4) first lattice room;
The step of method is:
1) start up system: inoculation traditional wastewater treatment plant active sludge adds to organic matter removal reactor (2), makes sludge concentration be 2000-3000mg/L; The active sludge that inoculation has nitrification activity adds to self-supported denitrification reactor (4), makes its concentration reach 1500-3000mg/L; Oxygen-starved area to self-supported denitrification reactor adds biological suspended packing, and packing volume is than being 20-50%;
2) when running, adjustment operation is as follows:
2.1) sludge age of organic matter removal reactor (2) controls as 2-6 days, and aerobic zone Dissolved Oxygen concentration Control is 0.5-1.5mg/L, and return sludge ratio is 50-100%, and hydraulic detention time is 30-60min;
2.2) self-supported denitrification reactor (4) aerobic zone dissolved oxygen concentration is 0.3-0.8mg/L, and controlling sludge age by discharge excess sludge is 15-20 days;
2.3) self-supported denitrification reactor (4) sludge back flow quantity is 0.5-1.5 times of this reactor flooding quantity, and wherein the 5-10% of sludge reflux amount is delivered to sludge treatment reactor (6);
2.4) by adding Sodium Nitrite to sludge treatment reactor (6), nitrite nitrogen concentration in reactor is made to be 300-2000mg/L, and be 5.0-6.0 by adding pH in acid or alkali control sludge treatment reactor, sludge retention time is 12-24h.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986923A (en) * | 2015-07-27 | 2015-10-21 | 北京工业大学 | Multi-stage A/O biological nitrogen removal device and method based on shortcut nitrification-anaerobic ammonia oxidation of municipal sewage |
| CN105254129A (en) * | 2015-11-04 | 2016-01-20 | 北京城市排水集团有限责任公司 | Municipal sewage reclamation treatment device and treatment method adopting same |
| CN105800776A (en) * | 2016-04-14 | 2016-07-27 | 湖南大学 | FNA sidestream technology for reducing emission of N2O in sewage treatment process |
| CN106830573A (en) * | 2017-04-07 | 2017-06-13 | 北京工业大学 | Low energy consumption municipal sewage denitrogenation method based on the capture of reinforcing carbon with Anammox |
| CN108217950A (en) * | 2018-03-13 | 2018-06-29 | 北京工业大学 | The device and method that FNA reinforcement sludges ferment and realize sewerage short-cut denitrification dephosphorization |
| CN108409033A (en) * | 2018-03-13 | 2018-08-17 | 北京工业大学 | FNA strengthens the apparatus and method of the segmental influent UCT advanced nitrogen dephosphorization of short distance nitration |
| CN111924962A (en) * | 2020-08-24 | 2020-11-13 | 北京工业大学 | Method for rapidly realizing short-cut nitrification treatment of urban sewage based on FNA pretreatment biomembrane |
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| CN201220931Y (en) * | 2008-04-02 | 2009-04-15 | 北京城市排水集团有限责任公司 | Apparatus for realizing sludge shortcut nitrification by using FA and FNA control |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104986923A (en) * | 2015-07-27 | 2015-10-21 | 北京工业大学 | Multi-stage A/O biological nitrogen removal device and method based on shortcut nitrification-anaerobic ammonia oxidation of municipal sewage |
| CN104986923B (en) * | 2015-07-27 | 2017-06-06 | 北京工业大学 | A kind of apparatus and method of the multistage A/O biological denitrificaions based on municipal sewage short distance nitration Anammox |
| CN105254129A (en) * | 2015-11-04 | 2016-01-20 | 北京城市排水集团有限责任公司 | Municipal sewage reclamation treatment device and treatment method adopting same |
| CN105800776A (en) * | 2016-04-14 | 2016-07-27 | 湖南大学 | FNA sidestream technology for reducing emission of N2O in sewage treatment process |
| CN105800776B (en) * | 2016-04-14 | 2019-05-21 | 湖南大学 | One kind reducing N in sewage disposal process2The FNA effluent technique of O discharge |
| CN106830573A (en) * | 2017-04-07 | 2017-06-13 | 北京工业大学 | Low energy consumption municipal sewage denitrogenation method based on the capture of reinforcing carbon with Anammox |
| CN106830573B (en) * | 2017-04-07 | 2020-03-13 | 北京工业大学 | Low-energy-consumption urban sewage denitrification method based on enhanced carbon capture and anaerobic ammonia oxidation |
| CN108217950A (en) * | 2018-03-13 | 2018-06-29 | 北京工业大学 | The device and method that FNA reinforcement sludges ferment and realize sewerage short-cut denitrification dephosphorization |
| CN108409033A (en) * | 2018-03-13 | 2018-08-17 | 北京工业大学 | FNA strengthens the apparatus and method of the segmental influent UCT advanced nitrogen dephosphorization of short distance nitration |
| CN108217950B (en) * | 2018-03-13 | 2021-08-13 | 北京工业大学 | Device and method for FNA (FNA) enhanced sludge fermentation and short-range nitrogen and phosphorus removal of sewage |
| CN111924962A (en) * | 2020-08-24 | 2020-11-13 | 北京工业大学 | Method for rapidly realizing short-cut nitrification treatment of urban sewage based on FNA pretreatment biomembrane |
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