CN116693056A - Method for rapidly culturing activated sludge by using cohesive soil - Google Patents
Method for rapidly culturing activated sludge by using cohesive soil Download PDFInfo
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- CN116693056A CN116693056A CN202310863587.8A CN202310863587A CN116693056A CN 116693056 A CN116693056 A CN 116693056A CN 202310863587 A CN202310863587 A CN 202310863587A CN 116693056 A CN116693056 A CN 116693056A
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- 239000010802 sludge Substances 0.000 title claims abstract description 63
- 239000002689 soil Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 27
- 238000012258 culturing Methods 0.000 title claims abstract description 14
- 239000010865 sewage Substances 0.000 claims abstract description 86
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000008213 purified water Substances 0.000 claims abstract description 7
- 238000005273 aeration Methods 0.000 claims description 46
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 41
- 239000011574 phosphorus Substances 0.000 claims description 22
- 229910052698 phosphorus Inorganic materials 0.000 claims description 22
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 21
- 229910052757 nitrogen Inorganic materials 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 19
- 229910052799 carbon Inorganic materials 0.000 claims description 19
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 14
- 230000015556 catabolic process Effects 0.000 claims description 12
- 238000006731 degradation reaction Methods 0.000 claims description 12
- 241001148470 aerobic bacillus Species 0.000 claims description 11
- 241000894006 Bacteria Species 0.000 claims description 10
- 241001148471 unidentified anaerobic bacterium Species 0.000 claims description 10
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 claims description 9
- 235000015097 nutrients Nutrition 0.000 claims description 8
- IXPNQXFRVYWDDI-UHFFFAOYSA-N 1-methyl-2,4-dioxo-1,3-diazinane-5-carboximidamide Chemical compound CN1CC(C(N)=N)C(=O)NC1=O IXPNQXFRVYWDDI-UHFFFAOYSA-N 0.000 claims description 7
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 7
- 241000238557 Decapoda Species 0.000 claims description 7
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 claims description 7
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims description 7
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 7
- 229910019142 PO4 Inorganic materials 0.000 claims description 7
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 7
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 7
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000011575 calcium Substances 0.000 claims description 7
- 229910052791 calcium Inorganic materials 0.000 claims description 7
- 239000004202 carbamide Substances 0.000 claims description 7
- 235000013312 flour Nutrition 0.000 claims description 7
- 239000008103 glucose Substances 0.000 claims description 7
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 239000011777 magnesium Substances 0.000 claims description 7
- 229910052749 magnesium Inorganic materials 0.000 claims description 7
- 230000014759 maintenance of location Effects 0.000 claims description 7
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 7
- 239000010452 phosphate Substances 0.000 claims description 7
- 239000011591 potassium Substances 0.000 claims description 7
- 229910052700 potassium Inorganic materials 0.000 claims description 7
- 238000010992 reflux Methods 0.000 claims description 7
- 239000013049 sediment Substances 0.000 claims description 7
- 229910052708 sodium Inorganic materials 0.000 claims description 7
- 239000011734 sodium Substances 0.000 claims description 7
- 235000010413 sodium alginate Nutrition 0.000 claims description 7
- 229940005550 sodium alginate Drugs 0.000 claims description 7
- 239000000661 sodium alginate Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- 239000011593 sulfur Substances 0.000 claims description 7
- 229910052717 sulfur Inorganic materials 0.000 claims description 7
- 238000006213 oxygenation reaction Methods 0.000 claims description 4
- 230000001580 bacterial effect Effects 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 244000005700 microbiome Species 0.000 description 4
- 230000001105 regulatory effect Effects 0.000 description 3
- 230000000274 adsorptive effect Effects 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 241000237908 Riftia pachyptila Species 0.000 description 1
- 241000131858 Siboglinidae Species 0.000 description 1
- 241000254109 Tenebrio molitor Species 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000010796 biological waste Substances 0.000 description 1
- 238000012136 culture method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000002906 microbiologic effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2813—Anaerobic digestion processes using anaerobic contact processes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to the field of sewage treatment, in particular to a method for rapidly culturing activated sludge by using cohesive soil, which comprises the following steps: (1) preparing sewage with purified water; (2) culturing strains in the sewage; (3) adding viscous soil; (4) primary activated sludge stuffiness; and (5) culturing the activated sludge. The method utilizes the cohesive soil, and through a certain cultivation step, the activated sludge cultivation is realized rapidly, and the method has the advantages of simple operation, less investment, short debugging time, stable effect and the like.
Description
Technical Field
The invention belongs to the field of sewage treatment, and particularly relates to a method for rapidly culturing activated sludge by using cohesive soil.
Background
The active sludge process is one kind of biological waste water treating technology, and the active sludge consists of mainly microbe colony, attached organic matter and inorganic matter, and the main current A/O process technology is active sludge, which is used as aerobic and anaerobic microbe carrier and has high denitrification and dephosphorization capacity, high organic load and impact load caused by water fluctuation, and is the key of sewage treating system.
However, the sewage treatment system needs to clean deposited sludge at intervals, supplement fresh activated sludge, maintain the microbial ecological balance of the whole system, and particularly, the aging of the activated sludge can cause the increase of main pollution indexes of effluent. The existing sewage treatment system mainly depends on microorganism reproduction to recover the quantity and quality of activated sludge, and the recovery time generally needs more than a few weeks, and is long in time consumption and high in cost. And some of the current methods are not suitable for high-nitrogen and high-phosphorus sewage treatment, the domestication period is longer, and the method is uneconomical for sewage treatment plants which often need to be supplemented with activated sludge.
Disclosure of Invention
The main purpose of the invention is to provide a method for rapid culture and replenishment of activated sludge; solves the problems of long time and high cost of the traditional sewage treatment plant for supplementing activated sludge.
In order to solve the above problems, the present invention provides a method for rapidly culturing activated sludge using cohesive soil, comprising the steps of:
(1) Preparation of sewage with purified water
Measuring the contents of carbon, nitrogen and phosphorus in the domestic sewage, preparing the sewage by adopting purified water according to the contents of the carbon, nitrogen and phosphorus in the domestic sewage, and adding nutrient elements into the prepared sewage;
(2) Culture of bacterial in sewage
Adding prepared sewage and aerobic bacteria into an aerobic incubator of sewage treatment equipment, and performing intermittent aeration, and operating for 12-24 hours; adding prepared sewage and anaerobic bacteria into an anaerobic incubator of sewage treatment equipment, intermittently stirring, and running for 12-24 hours;
(3) Adding viscous soil
Sodium alginate, a carbon source and cohesive soil are respectively added into an aerobic incubator and an anaerobic incubator in sequence, and the aerobic incubator is continuously aerated, and primary activated sludge is respectively formed in the aerobic incubator and the anaerobic incubator;
(4) Primary activated sludge stuffiness
Adding domestic sewage into an aerobic incubator for multiple times and performing stuffy exposure, wherein the input amount of the domestic sewage is gradually increased, and when the sedimentation ratio of the activated sludge in the aerobic tank is more than 40%, the concentration of the activated sludge is 500-1000 mg/L, and stopping stuffy exposure;
(5) Activated sludge culture
And (3) adjusting aeration intermittent parameters, hydraulic retention time HRT and sludge reflux ratio of sewage treatment equipment, continuously adding domestic sewage into an anaerobic incubator, detecting the concentration of COD, ammonia nitrogen, total nitrogen and total phosphorus in water treated by the sewage treatment equipment when the concentration of the activated sludge is 2000-3500 mg/L, and completing the molding culture of the activated sludge when the COD degradation rate is more than or equal to 85%, the ammonia nitrogen degradation rate is more than or equal to 80%, the total nitrogen degradation rate is more than or equal to 65%, and the total phosphorus degradation rate is more than or equal to 80%.
Preferably, the nutrient elements include carbon, nitrogen, phosphorus, sulfur, sodium, potassium, calcium, magnesium, iron.
Preferably, the carbon is glucose, the nitrogen is urea, the phosphorus is phosphate, and the mass ratio of glucose to urea to phosphate is (0.1-0.8): (2-4): 1, a step of; the mass ratio of sulfur, potassium, calcium, magnesium, iron and sodium is (1-3): (0.5 to 0.8): (0.3 to 0.6): (0.1 to 0.5): (0.6-1.2): 1.
preferably, the aerobic bacteria are COD removing bacteria, ammonia nitrogen bacteria and dephosphorizing bacteria; the anaerobic bacteria are total azotobacteria; the mass ratio of the aerobic bacteria to the anaerobic bacteria is (5-10): 1.
preferably, the intermittent aeration has an aeration time of 5-15 min, a rest time of 5-15 min and an aeration intensity of 1-4 m 3 /m 2 h；
Preferably, the intermittent stirring time is 2-4 min, and the stopping time is 5-15 min.
Preferably, in the step (3), the sodium alginate amount is 2% -5%, the carbon source is flour, the viscous soil is a mixture of river sediment and shrimp and crab shells, and the proportion among the flour, the river sediment and the shrimp and crab shells is 1: (0.08-0.2): (0.1 to 0.6).
Preferably, the amount of the domestic sewage input in the step (4) is 0.5% -1.5% of the capacity of the sewage treatment equipment, the amount of the domestic sewage input each time is gradually increased according to 0.05% of the capacity of the sewage treatment equipment, the stuffy exposure time is 12-24 h, aeration oxygenation is carried out for 2-5 h, shutdown is carried out for 1-3 h, and the aeration intensity is 3-8 m 3 /m 2 h。
Preferably, the aeration parameters in the step (5) are aeration time, idle time and aeration intensity, wherein the aeration time is 5 min-15 min, the idle time is 10 min-25 min, and the aeration intensity is 1-3 m 3 /m 2 h, the hydraulic retention time HRT is 5-8 h, and the sludge reflux ratio is 75% -100%.
Preferably, in the step (5), the amount of the continuous domestic sewage is continuously added according to 1% -3% of the total capacity of the sewage treatment equipment.
Compared with the prior art, the invention has the advantages and positive effects that:
the method utilizes configuration sewage and cohesive soil to realize activated sludge culture in a short time.
The method mixes aerobic bacteria, nutrient substances, domestic sewage in treatment and viscous soil, and has simple culture method and quick response.
The method can be used for culturing on one side of the sewage treatment tank, is convenient and quick, and can be used in time.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of the apparatus of the present invention.
Detailed Description
The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
Example 1
A method for rapidly culturing activated sludge by using cohesive soil, which is carried out in sewage treatment equipment, the sewage treatment equipment is shown in figure 1, an aerobic incubator, an anaerobic incubator and a regulating box are adopted, wherein the aerobic incubator is communicated with the anaerobic incubator through a pipeline; the aerobic tank is communicated with the regulating box through a pipeline and a water pump; the regulating box is communicated with the anaerobic incubator through a pipeline;
the method for rapidly culturing the activated sludge by using the cohesive soil comprises the following steps:
(1) Preparation of sewage with purified water
Measuring the contents of carbon, nitrogen and phosphorus in the domestic sewage, preparing the sewage by adopting purified water according to the contents of the carbon, nitrogen and phosphorus in the domestic sewage, and adding nutrient elements into the prepared sewage; in this embodiment, the nutrient elements used include carbon, nitrogen, phosphorus, sulfur, sodium, potassium, calcium, magnesium and iron, wherein carbon is glucose, nitrogen is urea, phosphorus is phosphate, glucose, urea and phosphate in a mass ratio of 0.3:2.5:1, a step of; the mass ratio of sulfur, potassium, calcium, magnesium, iron and sodium is 1:0.5:0.3:0.1:0.6:1, a step of;
(2) Culture of bacterial in sewage
Adding prepared sewage and aerobic bacteria into an aerobic incubator of sewage treatment equipment, wherein the aerobic bacteria adopt COD to remove bacteria, ammonia nitrogen bacteria and phosphorus bacteria, and performing intermittent aeration, the aeration time of the intermittent aeration is 5min, the rest time is 5min, and the aeration intensity is 2m 3 /m 2 h, operating for 12-24 hours; adding prepared sewage and anaerobic bacteria into an anaerobic incubator of sewage treatment equipment, wherein the anaerobic bacteria are total nitrogen bacteria, and intermittently stirring, wherein the intermittent stirring time is 2min, the stopping time is 5min, and the anaerobic incubator runs for 12-24 hours, and the mass of the aerobic bacteria and the anaerobic bacteria is equal to that of the anaerobic bacteriaThe ratio is 5:1, a step of;
(3) Adding viscous soil
Sodium alginate, a carbon source and viscous soil are respectively added into an aerobic incubator and an anaerobic incubator in sequence, wherein the sodium alginate amount is 3%, the carbon source adopts flour, the viscous soil adopts mixed soil of river sediment and shrimp and crab shells, and the proportion among the flour, the river sediment and the shrimp and crab shells is 1:0.08:0.5, continuously aerating an aerobic incubator, wherein primary activated sludge is respectively formed in the aerobic incubator and the anaerobic incubator;
(4) Primary activated sludge stuffiness
Adding domestic sewage into an aerobic incubator for multiple times and performing stuffy exposure, wherein the input amount of the domestic sewage is gradually increased, and when the sedimentation ratio of the activated sludge in the aerobic tank is more than 40%, the concentration of the activated sludge is 500-1000 mg/L, and stopping stuffy exposure; further, the amount of domestic sewage is 0.5% of the capacity of the sewage treatment equipment, the amount of the domestic sewage added each time is gradually increased according to 0.05% of the capacity of the sewage treatment equipment, the aeration time is 12-24 h, aeration oxygenation is carried out for 2h, shutdown is carried out for 1h, and the aeration intensity is 3m 3 /m 2 h；
(5) Completing the culture of the activated sludge
Adjusting aeration intermittent parameters, hydraulic retention time HRT and sludge reflux ratio of sewage treatment equipment, wherein the aeration parameters are aeration time, idle time and aeration intensity, the aeration time is 20min, the idle time is 25min, and the aeration intensity is 2m 3 /m 2 h, the hydraulic retention time HRT is 5h, the sludge reflux ratio is 100%, domestic sewage is continuously added into the anaerobic incubator, the continuous domestic sewage adding amount is continuously added according to 1% of the total capacity of the sewage treatment equipment, when the concentration of the activated sludge is 2000-3500 mg/L, the concentration of COD, ammonia nitrogen, total nitrogen and total phosphorus in the water treated by the sewage treatment equipment is detected, when the COD degradation rate is more than or equal to 85%, the ammonia nitrogen degradation rate is more than or equal to 80%, the total nitrogen degradation rate is more than or equal to 65%, the total phosphorus degradation rate is more than or equal to 80%, and the forming culture of the activated sludge is completed.
After culturing, the activated sludge is gradually formed, takes on graininess, has obvious layering after standing and precipitation, has clear upper layer, and finds adsorptive protozoa such as clockworm, tenebrio molitor, inner tube worm, solitary worm and the like by microbiological microscopic examination of the activated sludge, wherein the microorganisms account for more than 70% of the total number.
Example 2
This embodiment differs from embodiment 1 in that: the operation parameters of the sewage treatment system, the adding amount of the nutrient elements such as strains, sewage, carbon sources, nitrogen, phosphorus and the like, wherein,
in the step (1), the mass ratio of glucose to urea to phosphate is 0.6:3.5:1, a step of; the mass ratio of the sulfur, the potassium, the calcium, the magnesium, the iron and the sodium is 3:0.8:0.6:0.5:1.2:1, a step of;
in the step (2), the mass ratio of the aerobic bacteria to the anaerobic bacteria is 8:1, the aeration time of intermittent aeration is 10min, the rest time is 15min, and the aeration intensity is 4m 3 /m 2 h, stirring intermittently for 3min and stopping for 15min;
in the step (3), the amount of the sodium alginate is 5%, and the proportion among the flour, the river sediment and the shrimp and crab shells is 1:0.2:12;
in the step (4), the amount of domestic sewage is 1% of the capacity of the sewage treatment equipment, the amount of the domestic sewage added each time is gradually increased according to 0.05% of the capacity of the sewage treatment equipment, the aeration time is 12-24 h, 4h aeration and oxygenation are adopted, 1h shutdown are carried out, and the aeration intensity is 4m 3 /m 2 h；
In the step (5), the aeration time is 10min, the stopping time is 25min, and the aeration intensity is 3m 3 /m 2 h, the hydraulic retention time HRT is 8h, the sludge reflux ratio is 100%, and the continuous feeding amount of domestic sewage is 1.5% of the total capacity of the sewage treatment equipment.
After culturing, the activated sludge is gradually formed, takes on granular shape, has a grey brown color, and is obviously layered after standing and precipitation, and the upper layer is clear. The activated sludge microorganism microscopic examination finds adsorptive protozoa such as bell worms, cover worms, inner tube worms, solitary worms and the like, and the microorganisms account for more than 75% of the total number.
The foregoing is merely illustrative of the present invention, and the present invention is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A method for rapidly culturing activated sludge by using cohesive soil, which is characterized by comprising the following steps:
(1) Preparation of sewage with purified water
Measuring the contents of carbon, nitrogen and phosphorus in the domestic sewage, preparing the sewage by adopting purified water according to the contents of the carbon, nitrogen and phosphorus in the domestic sewage, and adding nutrient elements into the prepared sewage;
(2) Culture of bacterial in sewage
Adding prepared sewage and aerobic bacteria into an aerobic incubator of sewage treatment equipment, and performing intermittent aeration, and operating for 12-24 hours; adding prepared sewage and anaerobic bacteria into an anaerobic incubator of sewage treatment equipment, intermittently stirring, and running for 12-24 hours;
(3) Adding viscous soil
Sodium alginate, a carbon source and cohesive soil are respectively added into an aerobic incubator and an anaerobic incubator in sequence, and the aerobic incubator is continuously aerated, and primary activated sludge is respectively formed in the aerobic incubator and the anaerobic incubator;
(4) Primary activated sludge stuffiness
Adding domestic sewage into an aerobic incubator for multiple times and performing stuffy exposure, wherein the input amount of the domestic sewage is gradually increased, and when the sedimentation ratio of the activated sludge in the aerobic tank is more than 40%, the concentration of the activated sludge is 500-1000 mg/L, and stopping stuffy exposure;
(5) Activated sludge culture
And (3) adjusting aeration intermittent parameters, hydraulic retention time HRT and sludge reflux ratio of sewage treatment equipment, continuously adding domestic sewage into an anaerobic incubator, detecting the concentration of COD, ammonia nitrogen, total nitrogen and total phosphorus in water treated by the sewage treatment equipment when the concentration of the activated sludge is 2000-3500 mg/L, and completing the molding culture of the activated sludge when the COD degradation rate is more than or equal to 85%, the ammonia nitrogen degradation rate is more than or equal to 80%, the total nitrogen degradation rate is more than or equal to 65%, and the total phosphorus degradation rate is more than or equal to 80%.
2. The method for rapid cultivation of activated sludge by clayey soil as claimed in claim 1, wherein the nutrient elements include carbon, nitrogen, phosphorus, sulfur, sodium, potassium, calcium, magnesium, iron.
3. The method for rapid culture of activated sludge by using cohesive soil according to claim 2, wherein the carbon is glucose, the nitrogen is urea, the phosphorus is phosphate, and the mass ratio of glucose to urea to phosphate is (0.1-0.8): (2-4): 1, a step of; the mass ratio of sulfur, potassium, calcium, magnesium, iron and sodium is (1-3): (0.5 to 0.8): (0.3 to 0.6): (0.1 to 0.5): (0.6-1.2): 1.
4. the method for rapid cultivation of activated sludge by using cohesive soil according to claim 1, wherein the aerobic bacteria are COD removing bacteria, ammonia nitrogen bacteria, phosphorus removing bacteria; the anaerobic bacteria are total azotobacteria; the mass ratio of the aerobic bacteria to the anaerobic bacteria is (5-10): 1.
5. the method for rapid cultivation of activated sludge by using cohesive soil as claimed in claim 1, wherein the intermittent aeration has an aeration time of 5 to 15min, a rest time of 5 to 15min, and an aeration intensity of 1 to 4m 3 /m 2 h。
6. The method for rapidly culturing activated sludge by using cohesive soil according to claim 1, wherein the intermittent stirring time is 2-4 min and the stopping time is 5-15 min.
7. The method for rapid culture of activated sludge by using cohesive soil according to claim 1, wherein in the step (3), the sodium alginate amount is 2% -5%, the carbon source is flour, the cohesive soil is a mixture of river sediment and shrimp and crab shells, and the ratio among the flour, the river sediment and the shrimp and crab shells is 1: (0.08-0.2): (0.1 to 0.6).
8. The method for rapid cultivation of activated sludge by using cohesive soil according to claim 1, wherein the amount of the domestic sewage input in the step (4) is 0.5% -1.5% of the capacity of the sewage treatment equipment, the amount of the domestic sewage input each time is gradually increased according to 0.05% of the capacity of the sewage treatment equipment, the aeration time is 12-24 h, aeration oxygenation is performed for 2-5 h, shutdown is performed for 1-3 h, and the aeration intensity is 3-8 m 3 /m 2 h。
9. The method for rapid cultivation of activated sludge by using cohesive soil according to claim 1, wherein the aeration parameters in the step (5) are aeration time, rest time and aeration intensity, wherein the aeration time is 5 min-15 min, the rest time is 10 min-25 min, and the aeration intensity is 1-3 m 3 /m 2 h, the hydraulic retention time HRT is 5-8 h, and the sludge reflux ratio is 75% -100%.
10. The method for rapid cultivation of activated sludge by using cohesive soil according to claim 1, wherein in the step (5), the amount of the continuously added domestic sewage is continuously added according to 1% -3% of the total capacity of the sewage treatment apparatus.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310863587.8A CN116693056A (en) | 2023-07-14 | 2023-07-14 | Method for rapidly culturing activated sludge by using cohesive soil |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310863587.8A CN116693056A (en) | 2023-07-14 | 2023-07-14 | Method for rapidly culturing activated sludge by using cohesive soil |
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