CN110759596A - Pretreatment process for breeding wastewater in pig farm - Google Patents
Pretreatment process for breeding wastewater in pig farm Download PDFInfo
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- CN110759596A CN110759596A CN201911091139.0A CN201911091139A CN110759596A CN 110759596 A CN110759596 A CN 110759596A CN 201911091139 A CN201911091139 A CN 201911091139A CN 110759596 A CN110759596 A CN 110759596A
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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
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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
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
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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
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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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
- C02F3/28—Anaerobic digestion 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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention relates to the technical field of breeding wastewater treatment, and discloses a pretreatment process for breeding wastewater in a pig farm, which comprises the following steps: s1, collecting liquid dung: s2, dry-wet separation: s3, supermagnetic separation: s4, hydrolysis acidification: s5, anaerobic treatment: s6, biochemical treatment. The process has the advantages that the dry-wet separation of the liquid dung is more thorough, a large amount of suspended matters in the original liquid dung are removed, the load of the original liquid dung is reduced, compared with the process combination of the traditional pretreatment and anaerobic tanks, the process is lower in design cost, more stable and safer in operation, the dry-wet separation can be effectively performed on the high-concentration suspended matter sewage in the urine foam excrement form, the advanced anaerobic ammonia oxidation treatment is applied, the ammonia nitrogen is conveniently removed before the biochemical treatment, the treatment effect is better, and the process has the combined action of microorganisms attached to and grown on the combined fluidized bed filler and formed into a biomembrane and high-concentration activated sludge, so that the process has the capability of efficiently removing COD and ammonia nitrogen.
Description
Technical Field
The invention relates to the technical field of breeding wastewater treatment, in particular to a pretreatment process of breeding wastewater in a pig farm.
Background
Along with the vigorous development of the live pig breeding industry, correspondingly, domestic pigs, sows and self-breeding pig farms are more and more, the increase of the number of the pig farms is corresponding to the increase of the breeding manure pollution amount, the environmental protection pressure is more and more increased, and the discharge standard of the breeding wastewater is strict day by day, on the basis, the conventional breeding wastewater treatment process needs to be improved urgently to meet the strict breeding wastewater discharge standard, so that the environmental protection problem is solved for the breeding farms in a real sense.
Chinese patent discloses a pretreatment process of high-suspended matter breeding wastewater (No. CN 110028181A), which can greatly reduce pollutants such as COD, suspended matters, total phosphorus and the like in the wastewater entering a subsequent unit of wastewater treatment, reduce the construction amount of the subsequent unit of wastewater treatment, and further reduce the construction cost and the operation cost, but in terms of pretreatment of breeding wastewater at present, the traditional pretreatment and anaerobic tank process combination has high cost, can not effectively carry out dry-wet separation on the wastewater with high-concentration suspended matters in the form of urine-soaking feces, is not perfect for treating a large amount of suspended matters in the original feces, and is easy to increase the load of the original feces, so that technical personnel in the field provide a pretreatment process of the breeding wastewater in a pig farm to solve the problems in the background technology.
Disclosure of Invention
The invention aims to provide a pretreatment process of breeding wastewater in a pig farm, so as to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a pretreatment process for pig farm breeding wastewater comprises the following steps:
s1, collecting liquid dung: collecting the raw manure water into a raw manure water collecting tank, carrying out homogenization and quantity-balancing adjustment in the raw manure water collecting tank, and arranging a grid on the raw manure collecting tank;
s2, dry-wet separation: after the average amount is adjusted, conveying the raw excrement water into a dry-wet separator through a submersible sewage pump for primary dry-wet separation, and enabling the separated liquid to flow into a separated liquid collecting tank;
s3, supermagnetic separation: after the separated liquid after dry-wet separation enters a separated liquid collecting tank, sewage is sent into a super-magnetic separation device from the separated liquid collecting tank through a submersible sewage pump, and the conveyed sewage is subjected to deep solid-liquid separation by the super-magnetic separation device;
s4, hydrolysis acidification: after deep solid-liquid separation, the produced sewage flows into a hydrolysis acidification tank, and macromolecular organic matters in the deep-separated sewage are hydrolyzed and acidified by the hydrolysis acidification tank to be decomposed into a large amount of degradable micromolecular organic matters;
s5, anaerobic treatment: after being hydrolyzed and acidified, the sewage deeply separated flows into an anaerobic filter tank, and a large amount of COD in the sewage is removed through the anaerobic filter tank;
s6, biochemical treatment: and conveying the sewage treated by the anaerobic filter tank into a biochemical tank through a submersible sewage pump, so that the sewage is subjected to biochemical treatment in the biochemical tank.
As a further scheme of the invention: a pre-aeration device is arranged in a raw manure collecting tank in the S1 and used for improving the impact resistance of the whole treatment system and reducing the foul smell of sewage in an anaerobic state, and a submersible sewage pump is arranged in the tank and used for lifting and conveying the sewage.
As a still further scheme of the invention: the hydrolysis acidification pool of S4 is filled with facultative anaerobes such as Clostridium, anaerobic digestive coccus, and Escherichia coli.
As a still further scheme of the invention: in S5, under the anaerobic condition, ammonia is used as an electron donor, nitrate or nitrite is used as an electron acceptor, ammonia is oxidized into nitrogen, and a large amount of ammonia nitrogen in sewage can be removed through the anaerobic filter.
As a still further scheme of the invention: the anaerobic filter in S5 is an up-flow anaerobic biological filter, and a filter screen is arranged in the anaerobic filter.
As a still further scheme of the invention: s6, wherein the biochemical pool is provided with high-concentration activated sludge and a biological membrane, wherein the biological membrane is formed by the attachment and growth of microorganisms on the combined fluidized bed filler, and the biochemical pool is provided with an aeration device.
Compared with the prior art, the invention has the beneficial effects that: the pretreatment process for the breeding wastewater in the pig farm designed by the invention not only can more thoroughly separate the dry and wet of the liquid dung during the specific operation, but also removes a large amount of suspended matters in the original fecal water, greatly reduces the load of the original fecal water, simultaneously has lower construction cost and more stable and safe operation compared with the traditional process combination of pretreatment and anaerobic tank, can effectively carry out dry-wet separation on the high-concentration suspended matter sewage in the form of urine-soaking feces, further, the advanced anaerobic ammonia oxidation treatment is applied to the breeding wastewater with high ammonia nitrogen characteristic, the ammonia nitrogen can be effectively and energy-effectively removed before the biochemical treatment, the treatment effect is better, and microorganisms are attached to and grow on the combined fluidized bed filler to form a biological film, and then the biological film and the high-concentration activated sludge act together, so that the process has the capability of efficiently removing COD (chemical oxygen demand) and ammonia nitrogen.
Drawings
FIG. 1 is a schematic diagram of a pretreatment process of breeding wastewater in a pig farm.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in an embodiment of the present invention, a pretreatment process for pig farm breeding wastewater includes the following steps:
s1, collecting liquid dung: the method comprises the following steps of (1) collecting raw dung into a raw dung collecting tank, carrying out homogenizing and uniform quantity adjustment in the raw dung collecting tank, wherein a grid is arranged on the raw dung collecting tank, and intercepting large floating objects in dung through the grid so as to ensure normal operation of subsequent dung treatment and effectively reduce treatment load and provide guarantee for long-term normal operation of a treatment process;
wherein, a pre-aeration device is arranged in the raw excrement collecting tank and used for improving the impact resistance of the whole treatment system and reducing the foul smell of the sewage in an anaerobic state, and a submersible sewage pump is arranged in the tank and used for lifting and conveying the sewage;
s2, dry-wet separation: after the average amount is adjusted, conveying the raw excrement water into a dry-wet separator through a submersible sewage pump for primary dry-wet separation, and then enabling the separated liquid to flow into a separated liquid collecting tank;
s3, supermagnetic separation: after the separated liquid after dry-wet separation enters a separated liquid collecting tank, sewage is sent into a super-magnetic separation device from the separated liquid collecting tank through a submersible sewage pump, the conveyed sewage is subjected to deep solid-liquid separation by using the super-magnetic separation device, light and small suspended matters in the sewage are further removed, and relatively thorough dry-wet separation is achieved;
s4, hydrolysis acidification: after deep solid-liquid separation, the produced sewage flows into a hydrolysis acidification tank, and macromolecular organic matters in the deep-separated sewage are hydrolyzed and acidified by the hydrolysis acidification tank to be decomposed into a large amount of degradable micromolecular organic matters, so that the biodegradability of the sewage is improved;
furthermore, the hydrolysis acidification pool is internally provided with fillers which are facultative anaerobes, such as clostridium, anaerobic digestive coccus, escherichia coli and the like.
S5, anaerobic treatment: deeply separated sewage flows into an anaerobic filter tank after being hydrolyzed and acidified, a large amount of COD in the sewage is removed through the anaerobic filter tank, the concentration load of the sewage is reduced, and the stable proceeding of the subsequent sewage biochemical reaction is ensured;
further, under the anaerobic condition, the anaerobic filter takes ammonia as an electron donor and nitrate or nitrite as an electron acceptor to oxidize the ammonia into nitrogen, and a large amount of ammonia nitrogen in the sewage can be removed through the anaerobic filter, and the anaerobic filter is an up-flow anaerobic biofilter and is internally provided with a filter screen;
s6, biochemical treatment: conveying the sewage treated by the anaerobic filter tank into a biochemical tank through a submersible sewage pump, and performing biochemical treatment on the sewage in the biochemical tank;
and high-concentration activated sludge and a biological film are arranged in the biochemical tank, wherein the biological film is formed by the attachment and growth of microorganisms on the combined fluidized bed filler, COD and ammonia nitrogen in the sewage are efficiently removed after the high-concentration activated sludge and the biological film in the biochemical tank jointly act on the sewage, and aeration equipment is arranged in the biochemical tank.
The working principle of the invention is as follows: during the concrete operation of the pig-raising wastewater pretreatment process, raw dung is firstly conveyed into a raw dung collecting tank, homogenized and uniformly regulated in the raw dung collecting tank, and then conveyed into a dry-wet separator through a submersible sewage pump for preliminary dry-wet separation, and separated liquid flows into a separated liquid collecting tank; the sewage is conveyed into the super-magnetic separation equipment through a pump in a sewage separation liquid collecting tank, so that the sewage is subjected to deep solid-liquid separation in the super-magnetic separation equipment, light and small amount of suspended matters in the sewage are further removed, more thorough dry-wet separation is achieved, then the sewage is subjected to the super-magnetic separation, the separation liquid enters a hydrolysis acidification tank, macromolecular organic matters in the sewage are hydrolyzed and acidified and are decomposed into a large amount of degradable micromolecular organic matters, the biodegradability of the sewage is improved, the sewage is subjected to hydrolysis acidification, then the sewage enters an anaerobic filter tank, a large amount of COD is removed, the concentration load of the sewage is reduced, the stable proceeding of subsequent sewage biochemical reaction is ensured, further, the high-efficiency removal of the COD and ammonia nitrogen in the sewage is realized through biochemical treatment, the pretreatment process not only thoroughly separates the dry and the wet, but also removes a large amount of suspended matters in the raw excrement, and the load of the raw excrement is, compared with the traditional process combination of pretreatment and anaerobic tank, the construction cost of the design is lower, the operation is more stable and safe, the dry-wet separation can be effectively carried out on the high-concentration suspended matter sewage in the form of urine-soaking feces, and the treatment effect is better.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (6)
1. The pretreatment process for the breeding wastewater in the pig farm is characterized by comprising the following steps of:
s1, collecting liquid dung: collecting the raw manure water into a raw manure water collecting tank, carrying out homogenization and quantity-balancing adjustment in the raw manure water collecting tank, and arranging a grid on the raw manure collecting tank;
s2, dry-wet separation: after the average amount is adjusted, conveying the raw excrement water into a dry-wet separator through a submersible sewage pump for primary dry-wet separation, and enabling the separated liquid to flow into a separated liquid collecting tank;
s3, supermagnetic separation: after the separated liquid after dry-wet separation enters a separated liquid collecting tank, sewage is sent into a super-magnetic separation device from the separated liquid collecting tank through a submersible sewage pump, and the conveyed sewage is subjected to deep solid-liquid separation by the super-magnetic separation device;
s4, hydrolysis acidification: after deep solid-liquid separation, the produced sewage flows into a hydrolysis acidification tank, and macromolecular organic matters in the deep-separated sewage are hydrolyzed and acidified by the hydrolysis acidification tank to be decomposed into a large amount of degradable micromolecular organic matters;
s5, anaerobic treatment: after being hydrolyzed and acidified, the sewage deeply separated flows into an anaerobic filter tank, and a large amount of COD in the sewage is removed through the anaerobic filter tank;
s6, biochemical treatment: and conveying the sewage treated by the anaerobic filter tank into a biochemical tank through a submersible sewage pump, so that the sewage is subjected to biochemical treatment in the biochemical tank.
2. The pretreatment process of wastewater from pig farm cultivation as claimed in claim 1, wherein the raw manure collecting tank of S1 is provided with a pre-aeration device for improving the impact resistance of the whole treatment system and reducing the foul smell of the wastewater in anaerobic condition, and a submersible sewage pump is provided for lifting and transporting the wastewater.
3. The pretreatment process of wastewater from pig farm cultivation as claimed in claim 1, wherein the hydrolytic acidification tank of S4 contains filler of facultative anaerobes such as Clostridium, anaerobic digester, Escherichia coli, etc.
4. The pretreatment process of wastewater from pig farm cultivation according to claim 1, wherein in S5, ammonia is oxidized into nitrogen gas by the anaerobic filter under anaerobic conditions with ammonia as an electron donor and nitrate or nitrite as an electron acceptor, and a large amount of ammonia nitrogen in the wastewater can be removed by the anaerobic filter.
5. The pretreatment process of wastewater from pig farm cultivation according to claim 1, wherein the anaerobic filter in S5 is an upflow anaerobic biofilter, and a filter screen is arranged in the anaerobic biofilter.
6. The pretreatment process for swine farm cultivation wastewater as claimed in claim 1, wherein the biochemical tank of S6 is filled with high concentration activated sludge and biofilm formed by the attachment and growth of microorganisms on the combined fluidized bed packing, and the biochemical tank is filled with aeration equipment.
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| CN201911091139.0A CN110759596A (en) | 2019-11-09 | 2019-11-09 | Pretreatment process for breeding wastewater in pig farm |
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| CN201911091139.0A CN110759596A (en) | 2019-11-09 | 2019-11-09 | Pretreatment process for breeding wastewater in pig farm |
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2019
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Application publication date: 20200207 |