CN113024014A - Hospital sewage treatment method - Google Patents
Hospital sewage treatment method Download PDFInfo
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- CN113024014A CN113024014A CN202110120632.1A CN202110120632A CN113024014A CN 113024014 A CN113024014 A CN 113024014A CN 202110120632 A CN202110120632 A CN 202110120632A CN 113024014 A CN113024014 A CN 113024014A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F2103/003—Wastewater from hospitals, laboratories and the like, heavily contaminated by pathogenic microorganisms
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
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- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention belongs to the field of sewage treatment, and particularly relates to a hospital sewage treatment method, which comprises the following steps: s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; s2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 1-6% of the weight of the wastewater; treating for 2-5 days; s3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner; s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 30-50 minutes, and standing for 60-120 minutes; directly discharging the supernatant; the addition amount of the flocculating agent is 1-10% of the weight of the clear liquid. The invention effectively removes COD in the hospital sewagecrBOD and NH3‑N。
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a hospital sewage treatment method.
Background
The hospital sewage refers to sewage discharged from hospitals (comprehensive hospitals, professional hospitals and other types of hospitals) to natural environments or urban pipelines. The water quality varies with the nature and scale of the hospital and the area in which it is located. The amount of sewage discharged by each sickbed per day is about 200-1000L. The main pollutants contained in hospital sewage are: pathogens (parasitic eggs, pathogenic bacteria, viruses, etc.), organic matter, floating and suspended matter, radioactive contaminants, etc., untreatedThe total bacteria content in the raw sewage reaches 108More than one/mL. The principle of hospital sewage treatment is as follows: the quality and the flow are divided, and the local separation treatment is carried out, so that the pollution is eliminated nearby at a pollution source. The main treatment method is precipitation and disinfection. The disinfectant commonly used in China is liquid chlorine, and in order to improve the disinfection efficiency and prevent secondary pollution, the ozonization method is mostly adopted for disinfection, and the discharge standard can be reached after disinfection treatment. The sludge produced in the treatment process is usually treated by a lime disinfection method and a high-temperature composting method. The prior hospital sewage treatment method is used for treating COD in sewagecrBOD and NH3The removal rate of-N is low.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a hospital sewage treatment method for improving COD in sewagecrBOD and NH3-removal rate of N.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a hospital sewage treatment method comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater;
s2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 1-6% of the weight of the wastewater; treating for 2-5 days;
s3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 30-50 minutes, and standing for 60-120 minutes; directly discharging the supernatant;
the addition amount of the flocculating agent is 1-10% of the weight of the clear liquid.
In the hospital sewage treatment method provided by the invention, the sterilization temperature in the step S1 is preferably 110-135 ℃.
In the hospital sewage treatment method provided by the present invention, preferably, the microorganism in step S2 is one or more of citrobacter buchneri, flavobacterium aquaticum, flavobacterium marinum, nitrobacter alkalophilus, bacillus subtilis, bacillus licheniformis, micrococcus luteus, rhizopus nigricans, rhizopus chinensis, ester producing yeast, bifidobacterium, mucor racemosus and mucor rouxii.
In the hospital sewage treatment method provided by the present invention, preferably, the microorganism is flavobacterium marinum, bacillus subtilis, rhizopus nigricans, ester producing yeast, bifidobacterium, mucor racemosus and mucor rouxii.
In the hospital sewage treatment method provided by the invention, the weight ratio of the flavobacterium marinum, the bacillus subtilis, the rhizopus nigricans, the ester-producing yeast, the bifidobacterium, the mucor racemosus and the mucor rouxii is preferably 1-5: 0.5-2: 1-3: 0.5-1: 1-5: 1-2.
In the hospital sewage treatment method provided by the invention, the weight ratio of the flavobacterium marinum, the bacillus subtilis, the rhizopus nigricans, the ester-producing yeast, the bifidobacterium, the mucor racemosus and the mucor rouxii is preferably 3:1:2:1:0.5:5: 1.
In the hospital sewage treatment method provided by the present invention, preferably, the added amount of the microorganism is 5% by weight of the wastewater.
In the hospital sewage treatment method provided by the invention, preferably, the flocculant mainly comprises the following raw materials in parts by weight: 10-35 parts of aluminum sulfate, 2-18 parts of tannin, 3-41 parts of acrylonitrile resin, 12-32 parts of azobisisobutyronitrile, 5-19 parts of sodium thiosulfate, 2-27 parts of sodium dodecyl benzene sulfonate, 7-33 parts of hexadecyl trimethyl ammonium bromide and 17-40 parts of acetic acid.
In the hospital sewage treatment method provided by the invention, preferably, the flocculant mainly comprises the following raw materials in parts by weight: 22 parts of aluminum sulfate, 13 parts of tannin, 6 parts of acrylonitrile resin, 13 parts of azodiisobutyronitrile, 9 parts of sodium thiosulfate, 7 parts of sodium dodecyl benzene sulfonate, 14 parts of hexadecyl trimethyl ammonium bromide and 23 parts of acetic acid.
By adopting the technical scheme, the tubular sterilization machine is adopted to treat the hospital sewageVarious pathogenic bacteria, viruses and other microorganisms in the feed are killed, so that the problem of environmental pollution caused by pathogenic bacteria is solved; decomposing organic matters in hospital sewage by using microorganisms, centrifuging by using a continuous flow centrifuge to remove thalli, and finally flocculating and precipitating the inorganic matters in the sewage by using a flocculating agent to effectively remove CODcrBOD and NH3-N. The bacillus subtilis and the mucor racemosus in the invention can reduce COD in hospital sewagecrBOD and NH3the-N content has a significant effect.
Detailed Description
The following further describes the embodiments of the present invention. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a hospital sewage treatment method, which comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; the sterilization temperature is 135 ℃.
S2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 6% of the weight of the wastewater; treating for 2 days; the microorganism is Flavobacterium marinum, Bacillus subtilis, Rhizopus nigricans, ester-producing yeast, Bifidobacterium, Mucor racemosus and Mucor rouxii, and the weight ratio of the microorganisms is 5:0.5:1:3:1:1: 2.
S3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 30 minutes, and standing for 120 minutes; directly discharging the supernatant;
the addition amount of the flocculant is 1 percent of the weight of the clear solution.
The flocculant mainly comprises the following raw materials in parts by weight: 10 parts of aluminum sulfate, 18 parts of tannin, 3 parts of acrylonitrile resin, 32 parts of azodiisobutyronitrile, 5 parts of sodium thiosulfate, 27 parts of sodium dodecyl benzene sulfonate, 7 parts of hexadecyl trimethyl ammonium bromide and 17 parts of acetic acid.
Example 2
The embodiment provides a hospital sewage treatment method, which comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; the sterilization temperature is 110 ℃.
S2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 1% of the weight of the wastewater; treating for 5 days; the microorganism is Flavobacterium marinum, Bacillus subtilis, Rhizopus nigricans, ester-producing yeast, Bifidobacterium, Mucor racemosus and Mucor rouxii with a weight ratio of 1:2:2:1:0.5:5: 1.
S3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 50 minutes, and standing for 60 minutes; directly discharging the supernatant;
the addition amount of the flocculant is 10 percent of the weight of the clear solution.
The flocculant mainly comprises the following raw materials in parts by weight: 35 parts of aluminum sulfate, 2 parts of tannin, 41 parts of acrylonitrile resin, 12 parts of azodiisobutyronitrile, 19 parts of sodium thiosulfate, 2 parts of sodium dodecyl benzene sulfonate, 33 parts of hexadecyl trimethyl ammonium bromide and 40 parts of acetic acid.
Example 3
The embodiment provides a hospital sewage treatment method, which comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; the sterilization temperature was 121 ℃.
S2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 5% of the weight of the wastewater; treating for 3 days; the microorganism is Flavobacterium marinum, Bacillus subtilis, Rhizopus nigricans, ester-producing yeast, Bifidobacterium, Mucor racemosus and Mucor rouxii with a weight ratio of 3:1:2:1:0.5:5: 1.
S3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 40 minutes, and standing for 80 minutes; directly discharging the supernatant;
the addition amount of the flocculant is 5 percent of the weight of the clear solution.
The flocculant mainly comprises the following raw materials in parts by weight: 22 parts of aluminum sulfate, 13 parts of tannin, 6 parts of acrylonitrile resin, 13 parts of azodiisobutyronitrile, 9 parts of sodium thiosulfate, 7 parts of sodium dodecyl benzene sulfonate, 14 parts of hexadecyl trimethyl ammonium bromide and 23 parts of acetic acid.
Example 4
The embodiment provides a hospital sewage treatment method, which comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; the sterilization temperature was 115 ℃.
S2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 3% of the weight of the wastewater; treating for 4 days; the microorganism is Bacillus subtilis, Rhizopus nigricans, ester-producing yeast, Bacillus bifidus, Mucor racemosus and Mucor rouxii at a weight ratio of 1:2:1:0.5:5: 1.
S3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 35 minutes, and standing for 80 minutes; directly discharging the supernatant;
the addition amount of the flocculant is 7 percent of the weight of the clear solution.
The flocculant mainly comprises the following raw materials in parts by weight: 18 parts of aluminum sulfate, 9 parts of tannin, 33 parts of acrylonitrile resin, 19 parts of azobisisobutyronitrile, 11 parts of sodium thiosulfate, 8 parts of sodium dodecyl benzene sulfonate, 27 parts of hexadecyl trimethyl ammonium bromide and 34 parts of acetic acid.
Example 5
The embodiment provides a hospital sewage treatment method, which comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; the sterilization temperature is 120 ℃.
S2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 3% of the weight of the wastewater; treating for 4 days; the microorganism is bacillus subtilis, rhizopus nigricans, bifidobacterium, mucor racemosus and mucor rouxii in a weight ratio of 1:2:0.5:5: 1.
S3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 46 minutes, and standing for 90 minutes; directly discharging the supernatant;
the addition amount of the flocculant is 8 percent of the weight of the clear solution.
The flocculant mainly comprises the following raw materials in parts by weight: 31 parts of aluminum sulfate, 12 parts of tannin, 13 parts of acrylonitrile resin, 24 parts of azodiisobutyronitrile, 9 parts of sodium thiosulfate, 21 parts of sodium dodecyl benzene sulfonate, 16 parts of hexadecyl trimethyl ammonium bromide and 18 parts of acetic acid.
Example 6
The embodiment provides a hospital sewage treatment method, which comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; the sterilization temperature is 135 ℃.
S2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 4% of the weight of the wastewater; treating for 4 days; the microorganism is Flavobacterium nigerum, Rhizopus nigricans, ester-producing yeast, Bifidobacterium, Mucor racemosus and Mucor rouxii, and the weight ratio is 3:1:2:1:1: 2.
S3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 39 minutes, and standing for 110 minutes; directly discharging the supernatant;
the addition amount of the flocculant is 4 percent of the weight of the clear solution.
The flocculant mainly comprises the following raw materials in parts by weight: 28 parts of aluminum sulfate, 15 parts of tannin, 27 parts of acrylonitrile resin, 30 parts of azobisisobutyronitrile, 11 parts of sodium thiosulfate, 13 parts of sodium dodecyl benzene sulfonate, 9 parts of hexadecyl trimethyl ammonium bromide and 21 parts of acetic acid.
Example 7
The embodiment provides a hospital sewage treatment method, which comprises the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater; the sterilization temperature is 125 ℃.
S2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 3% of the weight of the wastewater; treating for 3 days; the microorganism is Flavobacterium marinum, Bacillus subtilis, Rhizopus nigricans, ester-producing yeast, Bifidobacterium and Mucor rouxii in a weight ratio of 5:1:1:2:1: 2.
S3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 44 minutes, and standing for 86 minutes; directly discharging the supernatant;
the addition amount of the flocculant is 7 percent of the weight of the clear solution.
The flocculant mainly comprises the following raw materials in parts by weight: 18 parts of aluminum sulfate, 11 parts of tannin, 3 parts of acrylonitrile resin, 32 parts of azodiisobutyronitrile, 16 parts of sodium thiosulfate, 18 parts of sodium dodecyl benzene sulfonate, 7 parts of hexadecyl trimethyl ammonium bromide and 17 parts of acetic acid.
Test examples
In order to verify the beneficial technical effects of the invention, the medical wastewater is treated according to the above examples, and then the quality of the treated water is detected, and the results are shown in table 1.
TABLE 1 Water quality results (mg/L) of Hospital waste Water treated in examples
As can be seen from the above table, COD in the hospital wastewater treated by the methods of examples 1 to 5crBOD and NH3The content of-N was significantly lower than that of the hospital wastewater treated by the methods of examples 6 and 7, in which COD was contained in the hospital wastewater treated by the method of example 3crBOD and NH3The lowest content of-N. Bacillus subtilis was reduced in the microorganism used in the microbial treatment in example 6 and Mucor racemosus was reduced in the microorganism used in the microbial treatment in example 7, and it was found that Bacillus subtilis and Mucor racemosus contribute to the reduction of COD in hospital wastewatercrBOD and NH3the-N content has a significant effect.
The embodiments of the present invention have been described in detail, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.
Claims (9)
1. A hospital sewage treatment method is characterized by comprising the following steps:
s1, sewage sterilization: after collecting sewage generated by a hospital, continuously passing through a tubular sterilization machine for sterilization to obtain sterilized wastewater;
s2, microbial treatment: cooling the sterilized wastewater, and adding microorganisms into the cooled wastewater, wherein the addition amount of the microorganisms is 1-6% of the weight of the wastewater; treating for 2-5 days;
s3, centrifugal separation: carrying out centrifugal separation on the wastewater treated by the microorganisms in the step S2 by using a continuous flow centrifugal machine, discharging the centrifuged clear liquid to a flocculation tank, and killing thalli in a centralized manner;
s4, flocculation treatment: adding a flocculating agent into the clear liquid discharged into the flocculating tank, stirring for 30-50 minutes, and standing for 60-120 minutes; directly discharging the supernatant;
the addition amount of the flocculating agent is 1-10% of the weight of the clear liquid.
2. The hospital sewage treatment method according to claim 1, wherein the sterilization temperature in step S1 is 110-135 ℃.
3. The hospital sewage treatment method according to claim 1, wherein the microorganisms in step S2 are one or more of citrobacter buchneri, flavobacterium aquaticum, flavobacterium marinum, nitrobacter alkalophilus, bacillus subtilis, bacillus licheniformis, micrococcus luteus, rhizopus nigricans, rhizopus chinensis, ester-producing yeast, bifidobacterium, mucor racemosus, and mucor rouxii.
4. The hospital wastewater treatment method according to claim 3, wherein the microorganisms are Flavobacterium marinum, Bacillus subtilis, Rhizopus nigricans, Saccharomyces esterificans, Bifidobacterium longum, Mucor racemosus and Mucor rouxii.
5. The hospital sewage treatment method according to claim 4, wherein the weight ratio of the Flavobacterium marinum, the Bacillus subtilis, the Rhizopus nigricans, the ester-producing yeast, the Bifidobacterium longum, the Mucor racemosus and the Mucor rouxii is 1-5: 0.5-2: 1-3: 0.5-1: 1-5: 1-2.
6. The hospital sewage treatment method according to claim 5, wherein the weight ratio of Flavobacterium marinum, Bacillus subtilis, Rhizopus nigricans, Saccharomyces esterificans, Bifidobacterium longum, Mucor racemosus and Mucor rouxii is 3:1:2:1:0.5:5: 1.
7. The hospital sewage treatment method according to claim 1, wherein said microorganisms are added in an amount of 5% by weight of the wastewater.
8. The hospital sewage treatment method according to claim 1, wherein the flocculant is mainly composed of the following raw materials in parts by weight: 10-35 parts of aluminum sulfate, 2-18 parts of tannin, 3-41 parts of acrylonitrile resin, 12-32 parts of azobisisobutyronitrile, 5-19 parts of sodium thiosulfate, 2-27 parts of sodium dodecyl benzene sulfonate, 7-33 parts of hexadecyl trimethyl ammonium bromide and 17-40 parts of acetic acid.
9. The hospital sewage treatment method according to claim 8, wherein the flocculant is mainly composed of the following raw materials in parts by weight: 22 parts of aluminum sulfate, 13 parts of tannin, 6 parts of acrylonitrile resin, 13 parts of azodiisobutyronitrile, 9 parts of sodium thiosulfate, 7 parts of sodium dodecyl benzene sulfonate, 14 parts of hexadecyl trimethyl ammonium bromide and 23 parts of acetic acid.
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