CN102101743A - Device and method for biological intensified shortcut biological nitrogen removal of municipal sewage - Google Patents
Device and method for biological intensified shortcut biological nitrogen removal of municipal sewage Download PDFInfo
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- CN102101743A CN102101743A CN 201110004483 CN201110004483A CN102101743A CN 102101743 A CN102101743 A CN 102101743A CN 201110004483 CN201110004483 CN 201110004483 CN 201110004483 A CN201110004483 A CN 201110004483A CN 102101743 A CN102101743 A CN 102101743A
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- 239000010865 sewage Substances 0.000 title claims abstract description 21
- 238000000034 method Methods 0.000 title claims abstract description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title abstract description 14
- 229910052757 nitrogen Inorganic materials 0.000 title abstract description 7
- 239000010802 sludge Substances 0.000 claims abstract description 180
- 239000007788 liquid Substances 0.000 claims abstract description 105
- 230000029087 digestion Effects 0.000 claims abstract description 103
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 101
- 238000005273 aeration Methods 0.000 claims abstract description 22
- 238000004062 sedimentation Methods 0.000 claims abstract description 17
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000001301 oxygen Substances 0.000 claims abstract description 8
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 8
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 4
- 238000010992 reflux Methods 0.000 claims description 34
- 230000001105 regulatory effect Effects 0.000 claims description 14
- 239000007789 gas Substances 0.000 claims description 8
- 238000003756 stirring Methods 0.000 claims description 8
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 230000003203 everyday effect Effects 0.000 claims description 3
- 239000011259 mixed solution Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 12
- 229910052799 carbon Inorganic materials 0.000 abstract description 12
- 230000005764 inhibitory process Effects 0.000 abstract description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 1
- 238000006396 nitration reaction Methods 0.000 description 15
- 238000005516 engineering process Methods 0.000 description 6
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000010841 municipal wastewater Substances 0.000 description 2
- 230000001376 precipitating effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-M Nitrite anion Chemical compound [O-]N=O IOVCWXUNBOPUCH-UHFFFAOYSA-M 0.000 description 1
- JVMRPSJZNHXORP-UHFFFAOYSA-N ON=O.ON=O.ON=O.N Chemical compound ON=O.ON=O.ON=O.N JVMRPSJZNHXORP-UHFFFAOYSA-N 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 230000036284 oxygen consumption Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
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Abstract
The invention provides a device and method for biological intensified shortcut biological nitrogen removal of municipal sewage. The device comprises a municipal sewage raw water tank, a municipal sewage anaerobic-oxic (AO) reactor, a municipal sewage secondary sedimentation tank, a sludge digestion liquid raw water tank, a sludge digestion liquid AO reactor and a sludge digestion liquid secondary sedimentation tank, wherein the municipal sewage secondary sedimentation tank is a radial flow sedimentation tank; and the sludge digestion liquid secondary sedimentation tank is a vertical flow sedimentation tank. The method is as follows: carrying out shortcut nitrification on sludge digestion liquid through inhibition of low dissolved oxygen (DO is 0.5-1mg/L) and free ammonia (FA); and adding the excess sludge in a sludge digestion liquid shortcut nitrification system to a municipal sewage shortcut nitrification system, and simultaneously maintaining the low dissolved oxygen of the system (DO is 0.3-0.8mg/L), thereby stably achieving the efficient shortcut nitrification of the municipal sewage. By using the method, the shortcut nitrification and denitrification can be achieved, aeration energy consumption is saved, carbon source requirement for denitrification is reduced, sludge yield is reduced, and simultaneously, the volume load of the municipal sewage shortcut nitrification system is improved and the shock resistance capability of the system is enhanced.
Description
Technical field
The present invention relates to the apparatus and method of the biological reinforced short range biological denitrification of a kind of municipal effluent, belong to the dirty water living creature processing technique field, be applicable to the municipal effluent denitrogenation processing.
Background technology
Country is to the increasingly stringent that requires of effluent of municipal sewage plant nitrogen content, especially in recent years to the requirement of water outlet total nitrogen TN concentration.The traditional biological denitride technology is the removal that realizes nitrogen by nitrifier and denitrifying bacteria, and competent carbon source is the key of denitrification efficient denitrification.When former water C/N ratio was lower than 3.4, former water carbon source can't satisfy the demand of denitrification to organic carbon source, need add outer carbon source and satisfy this requirement, to guarantee Nitrogen removal effect.And therefore China part municipal wastewater treatment plant C/N can't satisfy the requirement of traditional biological denitrogenation to carbon source far below 3.4, causes reaching country-level A emission standard.
The solution that appears as this problem of short-cut nitrification and denitrification denitrogenation theory provides new thinking, and short distance nitration only is oxidized to nitrite nitrogen with ammonia nitrogen, thus short-cut nitrification and denitrification reduced from
Revert to
The required carbon source of process, can save 40% carbon source; Can save 25% aeration rate in addition; The nitrite denitrification rate carries out with 1.5 to 2 times nitrate denitrification rate; Reduce CO
2Quantity discharged reach 20%; Reduce by 33%～35% sludge yield in the nitrifying process, in denitrification process, reduce by 55% sludge yield.
But the stable realization of municipal effluent short distance nitration is still a generally acknowledged difficult problem, especially realizes stable short-cut nitrification and denitrification so the rarely seen especially report of the practical engineering application of municipal effluent short distance nitration in flow reactor.
Summary of the invention
Purpose of the present invention is exactly in order to solve the problems of the technologies described above, the apparatus and method of the biological reinforced short range biological denitrification of a kind of municipal effluent have been proposed, low DO of this apparatus and method utilization and FA suppress to realize sludge digestion liquid short distance nitration, promptly realize the rate of rise of the rate of rise of AOB greater than NOB, make NOB constantly be eluriated, simultaneously sludge digestion liquid is high ammonia-nitrogen wastewater, makes the amount of the AOB that amount unit sludge in the municipal effluent AO system of the AOB that contains in the sludge digestion liquid AO system unit mud is contained; Therefore add to municipal effluent AO reactor by the excess sludge that sludge digestion liquid AO system is produced, increase the amount of AOB contained in its unit sludge, thereby strengthen short distance nitration efficient, improve nitrated volumetric loading, reduce floor space, the ability of enhanced system low-temperature impact resistance.
The objective of the invention is to solve by following solution: the device of the biological reinforced short range biological denitrification of municipal effluent is provided with municipal effluent raw water box, municipal effluent AO reactor, municipal effluent second pond, sludge digestion liquid raw water box, sludge digestion liquid AO reactor, sludge digestion liquid second pond;
Described municipal effluent raw water box is a uncovered casing, is provided with upflow tube and blow-down pipe; The municipal effluent raw water box is connected with municipal effluent AO reactor water intaking valve by intake pump;
Described municipal effluent AO reactor is a uncovered pond body, be divided into several lattice chambers, connect each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down, front end is lattice chamber, oxygen-starved area, lattice chamber, oxygen-starved area is provided with agitator and stirring rake, and the rear end is that aerobic zone lattice chamber is provided with aeration head; Air compressor machine is by gas meter, air volume regulating valve, be connected with the aeration head that is located at reactor bottom; Last lattice chamber of aerobic zone is connected with municipal effluent AO reactor water intaking valve by the internal reflux pump.Municipal effluent AO reactor is connected with the municipal effluent second pond by municipal effluent second pond pipe connecting;
Described municipal effluent second pond is a radical sedimentation basin, and this settling tank is connected with municipal effluent AO reactor water intaking valve by sludge reflux pump;
Described sludge digestion liquid raw water box is a uncovered casing, is provided with upflow tube and blow-down pipe, and sludge digestion liquid raw water box is connected with sludge digestion liquid AO reactor water intaking valve by intake pump;
Described sludge digestion liquid AO reactor is a uncovered pond body, be divided into several lattice chambers, connect each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down, front end is lattice chamber, oxygen-starved area, lattice chamber, oxygen-starved area is provided with agitator and stirring rake, and the rear end is that aerobic zone lattice chamber is provided with aeration head; Air compressor machine is by gas meter, air volume regulating valve, be connected with the aeration head that is located at reactor bottom; Last lattice chamber of aerobic zone is connected with sludge digestion liquid AO reactor water intaking valve by the internal reflux pump.Sludge digestion liquid AO reactor is connected with sludge digestion liquid second pond by sludge digestion liquid second pond pipe connecting;
Described sludge digestion liquid second pond is a vertical sedimentation basin, and this settling tank is connected with sludge digestion liquid AO reactor water intaking valve by sludge reflux pump; This settling tank rising pipe is connected with municipal effluent AO reactor; This sludge from sedimentation tank tube valve adds pump by short distance mud and is connected with municipal effluent AO reactor;
The treatment scheme of sludge digestion liquid in this device is: sludge digestion liquid pumps into sludge digestion liquid AO reactor oxygen-starved area with returned sluge, in the returned sluge
Utilize carbon source limited in the former water to carry out denitrification, then enter aerobic zone generation short distance nitration, ammonia nitrogen is converted into
Then mud mixture enters sludge digestion liquid second pond and carries out mud-water separation, the top clear water enters municipal effluent AO reactor oxygen-starved area, the below precipitating sludge is partly refluxed to sludge digestion liquid AO reactor oxygen-starved area, and part pumps into municipal effluent AO reactor oxygen-starved area;
The municipal sewage treatment flow process is as follows: municipal effluent, returned sluge, sludge digestion liquid treat effluent and sludge digestion liquid excess sludge enter municipal effluent AO reactor oxygen-starved area together, utilize carbon source generation denitrification in the municipal effluent, will
Be converted into nitrogen, then enter aerobic zone generation short distance nitration; Then mud mixture enters the municipal effluent second pond and carries out mud-water separation, and the top clear water is disposed to receiving water body, and the below precipitating sludge is partly refluxed to municipal effluent AO reactor front end, and part mud is as excess sludge discharge.
The method of the biological reinforced short range biological denitrification of municipal effluent disclosed by the invention may further comprise the steps:
1) will take from the active sludge that urban sewage plant aeration tank has nitrification and be added to municipal effluent AO reactor and municipal effluent second pond, making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; The former water of municipal effluent is added raw water box, start intake pump, enter municipal effluent AO reactor by municipal effluent AO reactor water intaking valve; Start oxygen-starved area agitator and air compressor machine, regulate air volume regulating valve and make that aerobic zone dissolved oxygen DO is 0.3-0.8mg/L; Start city sewage and sludge reflux pump and internal reflux pump, return sludge ratio is 50%-100%, and internal reflux ratio is 100%-300%;
2) will take from the active sludge that urban sewage plant aeration tank has nitrification and be added to sludge digestion liquid AO reactor and sludge digestion liquid second pond, making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; Sludge digestion liquid is added raw water box, start intake pump, enter sludge digestion liquid AO reactor by sludge digestion liquid AO reactor water intaking valve; Start oxygen-starved area agitator and air compressor machine, regulate air volume regulating valve and make that aerobic zone dissolved oxygen DO is 0.5-1.0mg/L; Start sludge digestion liquid sludge reflux pump, return sludge ratio is 30%-200%; Sludge age SRT is controlled to be 8-15d; When COD in the water of oxygen-starved area＞60mg/L, open sludge digestion liquid internal reflux pump, internal reflux ratio is 50-250%;
3) start short distance mud and add pump, the part excess sludge that sludge digestion liquid AO second pond is produced adds the reactor to municipal effluent AO, the per-cent that short distance mud dosage every day accounts for the total sludge quantity of municipal effluent AO reactor is defined as q, and the q span is 0.5%-10%;
4) according to the pH value and the temperature of mixed solution in sludge digestion liquid water quality and the sludge digestion liquid AO reactor, by
Scope in, adjust water inlet
Load is promptly adjusted flooding velocity and change return sludge ratio (adjusting) in the 30%-200% scope, when free ammonia (FA) when concentration is high, increases return sludge ratio, and keeping sludge digestion liquid AO reactor is 1-40mg/L along the FA concentration of journey;
5) keep the water outlet of sludge digestion liquid AO reactor
Concentration is less than 15mg/L; Work as water outlet
Concentration by improving hydraulic detention time HRT, promptly reduces flooding quantity during greater than 15mg/L, reduces water outlet
Concentration;
Know-why of the present invention is: utilize the FA inhibition and hang down the stable short distance nitration of DO realization sludge digestion liquid, thereby produce the high mud of unit sludge AOB content; When the low DO of municipal effluent AO reactor utilization realized short distance nitration, because the input of the high mud of AOB content makes that the reactor short distance nitration is more stable, short distance nitration speed was higher, thereby improves its volumetric loading, strengthens the ability of its low-temperature impact resistance.
The apparatus and method of the biological reinforced short range biological denitrification of municipal effluent of the present invention, compare with existing technology and to have following advantage:
1) the high AOB content sludge of sludge digestion liquid adds to municipal effluent AO reactor, make the amount of the AOB that unit sludge in this reactor is contained increase, thereby the municipal effluent short distance nitration that makes is more stable, and its anti-low temperature, the water yield, water quality impact capacity are stronger;
2) because municipal effluent AO reactor unit sludge AOB content increases, make system's short distance nitration speed increase, thereby volumetric loading increases, make the technology floor space reduce, be fit to the upgrading of existing water factory;
3) sludge digestion liquid side is handled, because the ammonia nitrogen loading height makes this system's short distance nitration speed higher, the existence of FA inhibition simultaneously makes that short distance nitration is more prone to realize and keep;
4) this technology also has short-cut nitrification and denitrification institute inherent characteristics: oxygen-consumption is few, and energy consumption reduces; The required carbon source amount of denitrification reduces, and the sewage water denitrification that lacks for carbon source has advantage; Sludge yield is few, reduces the sludge disposal expense.
Description of drawings
Fig. 1 strengthens the equipment mechanism synoptic diagram of short range biological denitrification for city of the present invention saprobia.
1 is the municipal effluent raw water box among the figure; 2 is municipal effluent AO reactor; 3 is the municipal effluent second pond; 4 are sludge digestion liquid raw water box; 5 are sludge digestion liquid AO reactor; 6 are sludge digestion liquid second pond; 1.1 be upflow tube; 1.2 be blow-down pipe; 2.1 be intake pump; 22 is water intaking valve; 2.3 be stirring rake; 2.4 be aeration head; 2.5 be sludge reflux pump; 2.6 be the internal reflux pump; 2.7 be reverse flow valve; 2.8 be air volume regulating valve; 2.9 be agitator; 2.10 be gas meter; 2.11 be air compressor machine; 2.12 for short distance mud adds pump; 3.1 be the mud reverse flow valve; 32 is the excess sludge discharge valve; 3.3 be; 3.4 be rising pipe; 3.5 be municipal effluent second pond pipe connecting; 3.6 be municipal effluent AO reactor outlet valve; 4.1 be upflow tube; 4.2 be blow-down pipe; 5.1 intake pump; 5.2 sludge digestion liquid AO reactor water intaking valve; 5.3 be stirring rake; 5.4 be aeration head; 5.5 be the internal reflux pump; 5.6 be sludge reflux pump; 5.7 be the mud reverse flow valve; 5.8 be air compressor machine; 5.9 be gas meter; 5.10 be agitator; 5.11 be air volume regulating valve; 6.1 be the excess sludge discharge valve; 6.2 for short distance mud adds valve; 6.3 be the mud return line valve; 6.4 be sludge digestion liquid AO reactor outlet valve; 6.5 be sludge digestion liquid second pond pipe connecting; 6.6 be rising pipe.
Embodiment
The present invention will be further described below in conjunction with drawings and Examples: as shown in Figure 1, the device of the biological reinforced short range biological denitrification of municipal effluent is provided with municipal effluent raw water box 1, municipal effluent AO reactor 2, municipal effluent second pond 3, sludge digestion liquid raw water box 4, sludge digestion liquid AO reactor 5, sludge digestion liquid second pond 6;
Described municipal effluent raw water box 1 is a uncovered casing, is provided with upflow tube 1.1 and blow-down pipe 1.2; Municipal effluent raw water box 1 is connected with municipal effluent AO reactor water intaking valve 2.2 by intake pump 2.1;
Described municipal effluent AO reactor is a uncovered pond body, be divided into several lattice chambers, connect each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down, front end is lattice chamber, oxygen-starved area, lattice chamber, oxygen-starved area is provided with agitator 2.9 and stirring rake 2.3, and the rear end is that aerobic zone lattice chamber is provided with aeration head 2.4; Air compressor machine 2.11 is by gas meter 2.10, air volume regulating valve 2.8, be connected with the aeration head 2.4 that is located at reactor bottom; Last lattice chamber of aerobic zone is connected with municipal effluent AO reactor water intaking valve 2.2 by internal reflux pump 2.6.Municipal effluent AO reactor 2 is connected with municipal effluent second pond 3 by municipal effluent second pond pipe connecting 3.5;
Described municipal effluent second pond 3 is a radical sedimentation basin, and this settling tank is connected with municipal effluent AO reactor water intaking valve 2.2 by sludge reflux pump 2.5;
Described sludge digestion liquid raw water box 4 is a uncovered casing, is provided with upflow tube 4.1 and blow-down pipe 4.2, and sludge digestion liquid raw water box 4 is connected with sludge digestion liquid AO reactor water intaking valve 5.2 by intake pump 5.1;
Described sludge digestion liquid AO reactor 5 is a uncovered pond body, be divided into several lattice chambers, connect each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down, front end is lattice chamber, oxygen-starved area, lattice chamber, oxygen-starved area is provided with agitator 5.10 and stirring rake 5.3, and the rear end is that aerobic zone lattice chamber is provided with aeration head 5.4; Air compressor machine 5.8 is by gas meter 5.9, air volume regulating valve 5.11, be connected with the aeration head 5.4 that is located at reactor bottom; Last lattice chamber of aerobic zone is connected with sludge digestion liquid AO reactor water intaking valve 5.2 by internal reflux pump 5.5.Sludge digestion liquid AO reactor 5 is connected with sludge digestion liquid second pond 6 by sludge digestion liquid second pond pipe connecting 6.5;
Described sludge digestion liquid second pond 6 is a vertical sedimentation basin, and this settling tank is connected with sludge digestion liquid AO reactor water intaking valve 5.2 by sludge reflux pump 5.6; This settling tank rising pipe 6.6 is connected with municipal effluent AO reactor 2; This sludge from sedimentation tank tube valve 6.2 adds pump 2.12 by short distance mud and is connected with municipal effluent AO reactor 2;
Concrete test water is taken from municipal wastewater treatment plant preliminary sedimentation tank water outlet of Gaobeidian City, Beijing and digested sludge dehydration liquid.Preliminary sedimentation tank effluent quality: COD is 106.1-182.4mg/L,
Be 40.24-64.97mg/L,
Be 0.00-1.12mg/L,
Be 0.11-1.19mg/L; SS is 60-138mg/L; TP is 3.13-8.31mg/L; Basicity is 247-405mg/L; PH is 7.02-7.58.Sludge dewatering liquid water quality: COD is 78-249mg/L;
Be 132-315mg/L,
Below detectability, TP is 7.4-32.9mg/L, and basicity is 854-1587mg/L, and pH is 6.93-8.67.Pilot system as shown in Figure 1, municipal effluent AO reactor useful volume is 36L, reactor size is L * B * H=60 * 12 * 50cm, is equally divided into 5 lattice chambers, lattice interventricular septum plate is connected by staggered up and down aperture.Sludge digestion liquid AO reactor 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 as follows:
1) will take from the active sludge that urban sewage plant aeration tank has nitrification and be added to municipal effluent AO reactor and municipal effluent second pond, making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; The former water of municipal effluent is added raw water box, start intake pump, enter municipal effluent AO reactor by municipal effluent AO reactor water intaking valve; Start oxygen-starved area agitator and air compressor machine, regulate air volume regulating valve and make that aerobic zone dissolved oxygen DO is 0.3-0.8mg/L; Starting city sewage and sludge reflux pump and internal reflux pump return sludge ratio is 50%-100%, and internal reflux ratio is 100%-300%;
2) will take from the active sludge that urban sewage plant aeration tank has nitrification and be added to sludge digestion liquid AO reactor and sludge digestion liquid second pond, making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; Sludge digestion liquid is added raw water box, start intake pump, enter sludge digestion liquid AO reactor by sludge digestion liquid AO reactor water intaking valve; Start oxygen-starved area agitator and air compressor machine, regulate air volume regulating valve and make that aerobic zone dissolved oxygen DO is 0.5-1.0mg/L; Start sludge digestion liquid sludge reflux pump, return sludge ratio is 30%-200%; Sludge age SRT is controlled to be 8-15d; When COD in the water of oxygen-starved area＞60mg/L, open sludge digestion liquid internal reflux pump, internal reflux ratio is 50-250%;
3) start short distance mud and add pump, the part excess sludge that sludge digestion liquid AO second pond is produced adds the reactor to municipal effluent AO, the per-cent that short distance mud dosage every day accounts for the total sludge quantity of municipal effluent AO reactor is defined as q, and the q span is 0.5%-10%;
4) according to the pH value and the temperature of mixed solution in sludge digestion liquid water quality and the sludge digestion liquid AO reactor, by
Scope in, adjust water inlet
Load is promptly adjusted flooding velocity and change return sludge ratio (adjusting) in the 30%-200% scope, when free ammonia (FA) when concentration is high, increases return sludge ratio, and keeping sludge digestion liquid AO reactor is 1-40mg/L along the FA concentration of journey;
5) keep the water outlet of sludge digestion liquid AO reactor
Concentration is less than 15mg/L; Work as water outlet
Concentration by improving hydraulic detention time HRT, promptly reduces flooding quantity during greater than 15mg/L, reduces water outlet
Concentration;
Test-results shows: after stable, municipal effluent water outlet COD＜35mg/L, TN are 10-15mg/L, sludge digestion liquid AO reactor maximum
Remove load and be 1.5kgN/m
3D, water outlet
Concentration 5-15mg/L, water outlet COD49-68mg/L.
Claims (2)
1. the device of the biological reinforced short range biological denitrification of municipal effluent is characterized in that: be provided with municipal effluent raw water box (1), municipal effluent AO reactor (2), municipal effluent second pond (3), sludge digestion liquid raw water box (4), sludge digestion liquid AO reactor (5), sludge digestion liquid second pond (6);
Described municipal effluent raw water box (1) is a uncovered casing, is provided with upflow tube (1.1) and blow-down pipe (1.2); Municipal effluent raw water box (1) is connected with municipal effluent AO reactor (2) water intaking valve (2.2) by intake pump (2.1);
Described municipal effluent AO reactor (2) is a uncovered pond body, be divided into several lattice chambers, connect each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down, front end is lattice chamber, oxygen-starved area, lattice chamber, oxygen-starved area is provided with agitator (2.9) and stirring rake (2.3), and the rear end is that aerobic zone lattice chamber is provided with aeration head (2.4); Air compressor machine (2.11) is by gas meter (2.10), air volume regulating valve (2.8), be connected with the aeration head that is located at reactor bottom (2.4); Last lattice chamber of aerobic zone is connected with municipal effluent AO reactor water intaking valve (2.2) by internal reflux pump (2.6); Municipal effluent AO reactor (2) is connected with municipal effluent second pond (3) by municipal effluent second pond pipe connecting (3.5);
Described municipal effluent second pond (3) is a radical sedimentation basin, and this settling tank is connected with municipal effluent AO reactor water intaking valve (2.2) by sludge reflux pump (2.5);
Described sludge digestion liquid raw water box (4) is a uncovered casing, is provided with upflow tube (4.1) and blow-down pipe (4.2), and sludge digestion liquid raw water box (4) is connected with sludge digestion liquid AO reactor water intaking valve (5.2) by intake pump (5.1);
Described sludge digestion liquid AO reactor (5) is a uncovered pond body, be divided into several lattice chambers, connect each lattice chamber according to the water (flow) direction flowing hole that is crisscross arranged up and down, front end is lattice chamber, oxygen-starved area, lattice chamber, oxygen-starved area is provided with agitator (5.10) and stirring rake (5.3), and the rear end is that aerobic zone lattice chamber is provided with aeration head (5.4); Air compressor machine (5.8) is by gas meter (5.9), air volume regulating valve (5.11), be connected with the aeration head that is located at reactor bottom (5.4); Last lattice chamber of aerobic zone is connected with sludge digestion liquid AO reactor water intaking valve (5.2) by internal reflux pump (5.5); Sludge digestion liquid AO reactor (5) is connected with sludge digestion liquid second pond (6) by sludge digestion liquid second pond pipe connecting (6.5);
Described sludge digestion liquid second pond (6) is a vertical sedimentation basin, and this settling tank is connected with sludge digestion liquid AO reactor water intaking valve (5.2) by sludge reflux pump (5.6); This settling tank rising pipe (6.6) is connected with municipal effluent AO reactor (2); This sludge from sedimentation tank tube valve (6.2) adds pump (2.12) by short distance mud and is connected with municipal effluent AO reactor (2).
2. the device of the biological reinforced short range biological denitrification of municipal effluent according to claim 1 is realized the method for the biological reinforced short range biological denitrification of municipal effluent, it is characterized in that comprising following content:
1) will take from the active sludge that urban sewage plant aeration tank has nitrification and be added to municipal effluent AO reactor (2) and municipal effluent second pond (3), making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; The former water of municipal effluent is added raw water box (1), start intake pump (2.1), enter municipal effluent AO reactor (2) by municipal effluent AO reactor water intaking valve (2.2); Start oxygen-starved area agitator (2.9) and air compressor machine (2.11), regulate air volume regulating valve (2.8) and make that aerobic zone dissolved oxygen DO is 0.3-0.8mg/L; Start city sewage and sludge reflux pump (2.5) and internal reflux pump (2.6), return sludge ratio is 50%-100%, and internal reflux ratio is 100%-300%;
2) will take from the active sludge that urban sewage plant aeration tank has nitrification and be added to sludge digestion liquid AO reactor (5) and sludge digestion liquid second pond (6), making activated sludge concentration MLSS behind the seed sludge is 3000-4000mg/L; Sludge digestion liquid is added raw water box (4), start intake pump (5.1), enter sludge digestion liquid AO reactor (5) by sludge digestion liquid AO reactor water intaking valve (5.2); Start oxygen-starved area agitator (5.10) and air compressor machine (5.8), regulate air volume regulating valve (5.11) and make that aerobic zone dissolved oxygen DO is 0.5-1.0mg/L; Start sludge digestion liquid sludge reflux pump (5.6), return sludge ratio is 30%-200%; Sludge age SRT is controlled to be 8-15d; When COD in the water of oxygen-starved area＞60mg/L, open sludge digestion liquid internal reflux pump (5.5), internal reflux ratio is 50-250%;
3) start short distance mud and add pump (2.12), the part excess sludge that sludge digestion liquid AO second pond (6) is produced adds to municipal effluent AO reactor (2), the per-cent that short distance mud dosage every day accounts for the total sludge quantity of municipal effluent AO reactor is defined as q, and the q span is 0.5%-10%;
4) according to the pH value and the temperature of mixed solution in sludge digestion liquid water quality and the sludge digestion liquid AO reactor (5), by
Scope in, adjust water inlet
Load is promptly adjusted flooding velocity and change return sludge ratio (adjusting) in the 30%-200% scope, when free ammonia FA concentration is high, increases return sludge ratio, and keeping sludge digestion liquid AO reactor (5) is 1-40mg/L along the FA concentration of journey;
5) keep sludge digestion liquid AO reactor (5) water outlet
Concentration is less than 15mg/L; Work as water outlet
Concentration by improving hydraulic detention time HRT, promptly reduces flooding quantity during greater than 15mg/L, reduces water outlet
Concentration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100044839A CN102101743B (en) | 2011-01-11 | 2011-01-11 | Device and method for biological intensified shortcut biological nitrogen removal of municipal sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100044839A CN102101743B (en) | 2011-01-11 | 2011-01-11 | Device and method for biological intensified shortcut biological nitrogen removal of municipal sewage |
Publications (2)
| Publication Number | Publication Date |
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| CN102101743A true CN102101743A (en) | 2011-06-22 |
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| CN102701455A (en) * | 2012-06-28 | 2012-10-03 | 苏州科博思流体科技有限公司 | Small buried sewage treatment device |
| CN104512964A (en) * | 2014-11-29 | 2015-04-15 | 北京工业大学 | Sludge side treatment-based urban sewage short-cut nitrogen removal method |
| CN109502906A (en) * | 2018-12-10 | 2019-03-22 | 北京城市排水集团有限责任公司 | A kind of municipal sewage main side stream Anammox collaboration denitrification process device and its application method |
| CN111892164A (en) * | 2020-07-21 | 2020-11-06 | 宁波中车时代电气设备有限公司 | Control method of integrated membrane biological reaction device based on short-cut nitrification and denitrification |
| CN117843198A (en) * | 2024-02-23 | 2024-04-09 | 重庆国际生物城开发投资有限公司 | Low-dissolved oxygen high-mud age treatment process for sewage treatment |
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Effective date of registration: 20200820 Address after: 100124 Chaoyang District, Beijing Ping Park, No. 100 Co-patentee after: Beijing Bairun Dadong Biotechnology Co., Ltd Patentee after: Peng Yongzhen Address before: 100124 Chaoyang District, Beijing Ping Park, No. 100 Patentee before: Peng Yongzhen |