CN112979096A - Slaughterhouse sewage treatment method based on photosynthetic microorganisms - Google Patents
Slaughterhouse sewage treatment method based on photosynthetic microorganisms Download PDFInfo
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- CN112979096A CN112979096A CN202110335192.1A CN202110335192A CN112979096A CN 112979096 A CN112979096 A CN 112979096A CN 202110335192 A CN202110335192 A CN 202110335192A CN 112979096 A CN112979096 A CN 112979096A
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic 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
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
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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
- C02F3/02—Aerobic processes
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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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
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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
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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
- C02F7/00—Aeration of stretches of water
Abstract
The invention discloses a slaughterhouse sewage treatment method based on photosynthetic microorganisms, which comprises the following steps of 1) treating slaughterhouse sewage by a grating tank, and separating residues from liquid sewage; 2) further removing solid residues from the sewage through a solid-liquid separator; 3) the sewage enters an adjusting tank, the pH is adjusted, then the sewage is kept stand and precipitated, and insoluble substances are separated from supernatant liquor; 4) conveying the supernatant to a facultative tank in which chemoheterotrophic mixed bacteria are put; 5) the sewage treated by the facultative tank enters an aerobic tank into which photoautotrophic mixed bacteria are put for treatment; 6) the sewage treated by the aerobic tank enters a sedimentation tank, the sewage is separated from a water body after standing treatment, and the microbial flocs in the sediment are collected for recycling; 7) the supernatant liquid treated by the sedimentation tank reaches the discharge standard and is discharged from the water outlet. The slaughter house sewage treatment method provided by the invention can effectively reduce the disordered discharge of slaughter house wastewater and avoid the damage of pollutants to the environmental water body.
Description
Technical Field
The invention relates to the technical field of water treatment, in particular to a slaughterhouse sewage treatment method based on photosynthetic microorganisms.
Background
The slaughterhouse wastewater contains a large amount of blood pollutants, hair, broken bone and meat, foot shells, waste viscera and other pollutants, the concentration of suspended matters is high, the water is reddish brown and has obvious fishy smell, and the slaughterhouse wastewater is typical high-suspended-matter organic wastewater easy to biodegrade. The wastewater is rich in protein and oil, and has high salt content. The discharged wastewater contains a large amount of pollutants such as organic matters, solid suspended matters, ammonia nitrogen and the like, and if the pollutants are not treated, the pollutants are directly discharged into a natural water body, so that a large amount of dissolved oxygen in the water body can be consumed, the water body is blacked and smelled, water body eutrophication is generated, and meanwhile, a large amount of suspended matters can block pipelines and the like, so that the ecological environment of the water body is seriously damaged.
Disclosure of Invention
In view of the state of the art, it is an object of the present invention to provide a method for the treatment of slaughterhouse wastewater based on photosynthetic microorganisms.
In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows:
a slaughterhouse sewage treatment method based on photosynthetic microorganisms comprises the following steps:
1) collecting slaughter house sewage, feeding the slaughter house sewage into a grid pond through a water collecting pipeline, separating macromolecular viscera residues from liquid sewage, and using solid garbage for landfill in a refuse dump subsequently;
2) the sewage treated by the grid pond still contains a large amount of solid residues, the solid residues are further removed by a solid-liquid separator, and the solid residues are used for manufacturing solid fertilizers or directly buried;
3) the sewage treated by the solid-liquid separator enters an adjusting tank, the capacity of the adjusting tank is daily treated water, lime is added to adjust the pH value to 7.5-8, then standing and precipitating are carried out, and insoluble substances are separated from supernatant liquor;
4) conveying the supernatant to a facultative tank by using a drainage pump, wherein the treatment time of the sewage in the facultative tank is 10-12 days, chemo-heterotrophic mixed bacteria specially used for degrading the sewage are put into the facultative tank, and the indexes of the sewage are sequentially reduced in the treatment process;
the chemoheterotrophic mixed bacteria are formed by mixing bacillus, nitrobacteria and denitrifying bacteria according to the volume ratio of 1:1: 1;
5) the sewage treated by the facultative tank enters an aerobic tank, the treatment time of the sewage in the aerobic tank is 6-8 days, the aerobic tank is filled with photoautotrophic mixed bacteria specially used for degrading the sewage, and indexes of the sewage are sequentially reduced in the treatment process until the sewage reaches the standard;
the photoautotrophic mixed bacteria are formed by mixing chlorella, scenedesmus and spirulina according to a volume ratio of 2:1: 1;
controlling the dissolved oxygen amount in the aerobic tank to be 1.5-2 mg/L;
6) the sewage treated by the aerobic tank enters a sedimentation tank, the sewage is separated from a water body after standing treatment, and the precipitated solid is dehydrated and used for preparing fertilizer; collecting the microbial floccules in the precipitate for recycling;
7) and (4) discharging the supernatant liquor treated by the sedimentation tank to the outside through a water outlet when the supernatant liquor reaches the discharge standard.
Furthermore, the volume ratio of the using amount of the photoautotrophic mixed bacteria to the using amount of the chemoheterotrophic mixed bacteria is 2: 1-1.5.
Further, before mixing, the bacillus, the nitrifying bacteria and the denitrifying bacteria are all cultured by using an LB culture medium; the chlorella and the scenedesmus are cultured by BG11 culture medium, and the spirulina is cultured by Zarrouk culture medium.
Furthermore, a reflux pump is arranged in the aerobic tank and used for refluxing the separated microorganism flocs treated by the sedimentation tank to the front end for reuse.
Furthermore, aeration pipelines are arranged in the facultative tank and the aerobic tank and used for introducing oxygen and stirring water, air is generated by a blower and enters the boxes along the aeration pipelines, and the ventilation capacity of the facultative tank is smaller than that of the aerobic tank.
Furthermore, pH, temperature, COD, ammonia nitrogen, total nitrogen and dissolved oxygen probes are arranged in the facultative tank and the aerobic tank, the probes are monitored three times at different time intervals every day, and all indexes are displayed through a PLC liquid crystal screen.
Furthermore, biological fillers are added into the facultative tank and the aerobic tank and are used for adsorbing microorganisms suspended in water.
Furthermore, the facultative tank and the aerobic tank are connected with water delivery pipelines which are arranged from bottom to top, and the fall between the tank bodies is 4-5 cm.
The microorganisms related to the invention are all provided by a strain storage library.
By adopting the technical scheme, after solid-liquid separation is carried out on the tail water of the slaughterhouse, the solid is subjected to landfill treatment, the pH of the residual sewage is adjusted and then enters the facultative anaerobic treatment system, nutrient substances are treated by chemoheterotrophic mixed bacteria such as bacillus, nitrobacteria and denitrifying bacteria, macromolecular organic matters are decomposed, and then the nutrient substances enter the aerobic treatment system. The photoautotrophic mixed bacteria composed of chlorella, scenedesmus, spirulina and the like in the aerobic treatment system can effectively decompose and absorb pollutants by using light energy as energy, and convert the pollutants into nitrogen, ammonia and other gases for release, and convert the rest into microorganism self components, so that the index concentrations of ammonia nitrogen, COD and the like in the pollutants are reduced. The aerobic system provides dissolved oxygen through an aerator and other equipment, and the dissolved oxygen is controlled to be 1.5-2 mg/L. The sewage from the aerobic treatment system is separated by long-time sedimentation, and the microbial flocs in the sedimentation are collected for recycling, and can be added into the facultative treatment system and the aerobic treatment system in the previous process again, so that the waste of thalli is avoided. The supernatant after precipitation reaches the discharge standard and is directly discharged from the water outlet.
The slaughter house sewage treatment method provided by the invention can effectively reduce the disordered discharge of slaughter house wastewater and avoid the damage of pollutants to the environmental water body.
Drawings
The invention will be further explained with reference to the drawings and the detailed description below:
FIG. 1 is a schematic flow diagram of an embodiment of the present invention;
fig. 2 is a schematic diagram of the apparatus according to the present invention.
Detailed Description
As shown in fig. 1 or 2, a method for treating slaughterhouse wastewater based on photosynthetic microorganisms comprises the following steps:
1) collecting slaughter house sewage, feeding the slaughter house sewage into a grid pond through a water collecting pipeline, separating macromolecular viscera residues from liquid sewage, and using solid garbage for landfill in a refuse dump subsequently;
2) the sewage treated by the grid pond still contains a large amount of solid residues, the solid residues are further removed by a solid-liquid separator, and the solid residues are used for manufacturing solid fertilizers or directly buried;
3) the sewage treated by the solid-liquid separator enters an adjusting tank, the capacity of the adjusting tank is daily treated water, lime is added to adjust the pH value to 7.5-8, then standing and precipitating are carried out, and insoluble substances are separated from supernatant liquor;
4) conveying the supernatant to a facultative tank by using a drainage pump, wherein the treatment time of the sewage in the facultative tank is 10-12 days, chemo-heterotrophic mixed bacteria specially used for degrading the sewage are put into the facultative tank, and the indexes of the sewage are sequentially reduced in the treatment process;
the chemoheterotrophic mixed bacteria are formed by mixing bacillus, nitrobacteria and denitrifying bacteria according to the volume ratio of 1:1: 1;
5) the sewage treated by the facultative tank enters an aerobic tank, the treatment time of the sewage in the aerobic tank is 6-8 days, the aerobic tank is filled with photoautotrophic mixed bacteria specially used for degrading the sewage, and indexes of the sewage are sequentially reduced in the flowing process until the sewage reaches the standard;
the photoautotrophic mixed bacteria are formed by mixing chlorella, scenedesmus and spirulina according to a volume ratio of 2:1: 1;
controlling the dissolved oxygen amount in the aerobic tank to be 1.5-2 mg/L;
6) the sewage treated by the aerobic tank enters a sedimentation tank, the sewage is separated from a water body after standing treatment, and the precipitated solid is dehydrated and used for preparing fertilizer; collecting the microbial floccules in the precipitate for recycling;
7) and (4) discharging the supernatant liquor treated by the sedimentation tank to the outside through a water outlet when the supernatant liquor reaches the discharge standard.
The volume ratio of the using amount of the photoautotrophic mixed bacteria to the using amount of the chemoheterotrophic mixed bacteria is 2: 1-1.5.
The bacillus, the nitrifying bacteria and the denitrifying bacteria are all cultured by using an LB culture medium before being mixed; the chlorella and the scenedesmus are cultured by BG11 culture medium, and the spirulina is cultured by Zarrouk culture medium.
And a reflux pump is arranged in the aerobic tank and is used for refluxing the separated microbial flocs treated by the sedimentation tank to the front end for reuse.
The facultative tank and the aerobic tank are respectively provided with an aeration pipeline for introducing oxygen and stirring water, air is generated by a blower and enters each tank body along the aeration pipelines, and the ventilation capacity of the facultative tank is smaller than that of the aerobic tank.
The facultative tank and the aerobic tank are respectively provided with a pH probe, a temperature probe, a COD probe, an ammonia nitrogen probe, a total nitrogen probe and a dissolved oxygen probe, the probes are monitored three times at different time intervals every day, and all indexes are displayed through a PLC liquid crystal screen.
Biological fillers are added into the facultative tank and the aerobic tank and are used for adsorbing microorganisms suspended in water.
The facultative tank and the aerobic tank are connected with water delivery pipelines which are arranged from bottom to top, and the fall between the tank bodies is 4-5 cm.
By adopting the water treatment method, the COD concentration in the slaughterhouse sewage can be reduced to below 200mg/L from 3000 mg/L.
TABLE 1 relationship of COD degradation efficiency with respect to microbial addition and residence time
In Table 1, the addition amount is the ratio of the volume of the added strain to the total volume of the system. The retention time is the total retention time, i.e. the total treatment time of the wastewater.
The foregoing is directed to embodiments of the present invention, and equivalents, modifications, substitutions and variations such as will occur to those skilled in the art, which fall within the scope and spirit of the appended claims.
Claims (6)
1. A slaughterhouse sewage treatment method based on photosynthetic microorganisms is characterized by comprising the following steps: which comprises the following steps:
1) collecting slaughter house sewage, feeding the slaughter house sewage into a grid pond through a water collecting pipeline, separating macromolecular viscera residues from liquid sewage, and using the viscera residues for landfill in a refuse dump subsequently;
2) further removing solid residues from the sewage treated by the grid pond through a solid-liquid separator, and using the solid residues for manufacturing solid fertilizers or directly burying the solid fertilizers or the solid fertilizers;
3) the sewage treated by the solid-liquid separator enters an adjusting tank, lime is added to adjust the pH value to 7.5-8, then standing and precipitating are carried out, and insoluble substances are separated from supernatant liquor;
4) conveying the supernatant to a facultative tank by using a drainage pump, wherein the treatment time of the sewage in the facultative tank is 10-12 days, chemo-heterotrophic mixed bacteria specially used for degrading the sewage are put into the facultative tank, and the indexes of the sewage are sequentially reduced in the treatment process;
the chemoheterotrophic mixed bacteria are formed by mixing bacillus, nitrobacteria and denitrifying bacteria;
5) the sewage treated by the facultative tank enters an aerobic tank, the treatment time of the sewage in the aerobic tank is 6-8 days, the aerobic tank is filled with photoautotrophic mixed bacteria specially used for degrading the sewage, and indexes of the sewage are sequentially reduced in the treatment process until the sewage reaches the standard;
the photoautotrophic mixed bacteria is prepared by mixing chlorella, scenedesmus and spirulina;
6) the sewage treated by the aerobic tank enters a sedimentation tank, the sewage is separated from a water body after standing treatment, and the precipitated solid is dehydrated and used for preparing fertilizer; collecting the microbial floccules in the precipitate for recycling;
7) and (4) discharging the supernatant liquor treated by the sedimentation tank to the outside through a water outlet when the supernatant liquor reaches the discharge standard.
2. A photosynthetic microorganism based slaughterhouse wastewater treatment process according to claim 1, characterised in that: the chemoheterotrophic mixed bacteria are formed by mixing bacillus, nitrobacteria and denitrifying bacteria according to the volume ratio of 1:1:1
A photosynthetic microorganism based slaughterhouse wastewater treatment process according to claim 1, characterised in that: the photoautotrophic mixed bacteria are formed by mixing chlorella, scenedesmus and spirulina according to a volume ratio of 2:1: 1;
a photosynthetic microorganism based slaughterhouse wastewater treatment process according to claim 1, characterised in that: the volume ratio of the using amount of the photoautotrophic mixed bacteria to the using amount of the chemoheterotrophic mixed bacteria is 2: 1-1.5.
3. A photosynthetic microorganism based slaughterhouse wastewater treatment process according to claim 1, characterised in that: the bacillus, the nitrifying bacteria and the denitrifying bacteria are all cultured by using an LB culture medium before being mixed; the chlorella and the scenedesmus are cultured by BG11 culture medium, and the spirulina is cultured by Zarrouk culture medium.
4. A photosynthetic microorganism based slaughterhouse wastewater treatment process according to claim 1, characterised in that: the dissolved oxygen in the aerobic tank is controlled to be 1.5-2 mg/L.
5. A photosynthetic microorganism based slaughterhouse wastewater treatment process according to claim 1, characterised in that: and a reflux pump is arranged in the aerobic tank and is used for refluxing the separated microbial flocs treated by the sedimentation tank to the front end for reuse.
6. A photosynthetic microorganism based slaughterhouse wastewater treatment process according to claim 1, characterised in that: biological fillers are added into the facultative tank and the aerobic tank and are used for adsorbing microorganisms suspended in water.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110335192.1A CN112979096A (en) | 2021-03-29 | 2021-03-29 | Slaughterhouse sewage treatment method based on photosynthetic microorganisms |
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| CN202110335192.1A CN112979096A (en) | 2021-03-29 | 2021-03-29 | Slaughterhouse sewage treatment method based on photosynthetic microorganisms |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050004552A (en) * | 2003-07-03 | 2005-01-12 | (주)제우스 | a waste water disposal plant |
| CN103274527A (en) * | 2013-05-23 | 2013-09-04 | 南昌大学 | Continuous system for treating organic wastewater by using microalgae |
| CN106116031A (en) * | 2016-07-28 | 2016-11-16 | 云南珠源环保工程有限公司 | A kind of efficient treatment process of slaughtering wastewater |
| CN210103708U (en) * | 2019-06-11 | 2020-02-21 | 江苏省科建成套设备有限公司 | Advanced treatment device for slaughter wastewater |
| CN111635082A (en) * | 2020-06-30 | 2020-09-08 | 福州科力恩生物科技有限公司 | Garbage treatment system and treatment method and application thereof |
| CN112047583A (en) * | 2020-09-27 | 2020-12-08 | 云南今业生态建设集团有限公司 | Slaughterhouse sewage treatment process |
-
2021
- 2021-03-29 CN CN202110335192.1A patent/CN112979096A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20050004552A (en) * | 2003-07-03 | 2005-01-12 | (주)제우스 | a waste water disposal plant |
| CN103274527A (en) * | 2013-05-23 | 2013-09-04 | 南昌大学 | Continuous system for treating organic wastewater by using microalgae |
| CN106116031A (en) * | 2016-07-28 | 2016-11-16 | 云南珠源环保工程有限公司 | A kind of efficient treatment process of slaughtering wastewater |
| CN210103708U (en) * | 2019-06-11 | 2020-02-21 | 江苏省科建成套设备有限公司 | Advanced treatment device for slaughter wastewater |
| CN111635082A (en) * | 2020-06-30 | 2020-09-08 | 福州科力恩生物科技有限公司 | Garbage treatment system and treatment method and application thereof |
| CN112047583A (en) * | 2020-09-27 | 2020-12-08 | 云南今业生态建设集团有限公司 | Slaughterhouse sewage treatment process |
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