CN210438567U - Treatment device for pig manure sewage - Google Patents
Treatment device for pig manure sewage Download PDFInfo
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- CN210438567U CN210438567U CN201920371714.1U CN201920371714U CN210438567U CN 210438567 U CN210438567 U CN 210438567U CN 201920371714 U CN201920371714 U CN 201920371714U CN 210438567 U CN210438567 U CN 210438567U
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Abstract
A treatment device for pig manure sewage relates to the technical field of sewage treatment, and is mainly used for treating a large amount of continuously generated pig manure sewage, 00 comprises a collection anaerobic tank, a primary filtering anaerobic tank, a secondary filtering anaerobic tank, an aerobic tank, a primary sedimentation tank and a secondary sedimentation tank which are arranged in sequence; a dry-wet separator is arranged between the collection anaerobic tank and the primary filtering anaerobic tank, the primary filtering anaerobic tank and the secondary filtering anaerobic tank are connected and share a partition wall, a first partition wall is arranged between the primary filtering anaerobic tank and the secondary filtering anaerobic tank, a first filter screen frame is arranged on the wall body of the first partition wall close to the side of the primary filtering anaerobic tank, and an aeration device is arranged in the aerobic tank; the first-stage sedimentation tank and the second-stage sedimentation tank are connected and arranged by a partition wall. The utility model discloses a filter treatment sewage deposits many times, but has advantages such as simple structure, low in manufacturing cost, continuous operation, treatment effeciency height, sewage treatment capacity are big.
Description
Technical Field
The utility model relates to a sewage treatment technical field, especially a processing apparatus of pig manure sewage.
Background
With the increasing development of the breeding industry in China, the pig breeding industry is developed into large-scale breeding from the breeding of previous individual households, but with the expansion of the breeding scale, a large amount of pig manure can cause air pollution, and the pig manure is usually accompanied with pig urine and waste water for cleaning a pigsty, so that the waste water can cause serious water pollution when being randomly discharged. With the improvement of environmental protection requirements, the pollution caused by pig manure becomes a problem to be solved urgently. In the prior art, a methane tank is usually used in the treatment process of pig manure sewage, and due to the existence of the methane tank, the treatment time of the pig manure sewage is long, the treatment capacity is limited, and the treatment requirement of a large amount of continuously generated pig manure sewage cannot be met.
Disclosure of Invention
The utility model aims to solve the technical problem that the treatment device for pig manure sewage is simple in structure and large in sewage treatment capacity.
The technical problem to be solved by the utility model is realized through the following technical scheme. The utility model relates to a processing apparatus of pig manure sewage, its characteristics are: comprises a collection anaerobic tank, a primary filtration anaerobic tank, a secondary filtration anaerobic tank, an aerobic tank, a primary sedimentation tank and a secondary sedimentation tank which are arranged in sequence;
a dry-wet separator is arranged between the collection anaerobic tank and the primary filtering anaerobic tank, a feed inlet of the dry-wet separator is communicated into the collection anaerobic tank through a feed pipeline, and a liquid discharge outlet of the dry-wet separator is communicated into the primary filtering anaerobic tank through a liquid outlet pipeline;
the first-stage filtering anaerobic tank and the second-stage filtering anaerobic tank are connected and arranged in a partition wall, a first partition wall is arranged between the first-stage filtering anaerobic tank and the second-stage filtering anaerobic tank, a first overflow groove is formed in the wall body of the first partition wall, which is close to the side of the first-stage filtering anaerobic tank, the depth of the first overflow groove in the horizontal direction on the first partition wall is 1/3-2/3 of the thickness of the first partition wall, the groove body of the first overflow groove is positioned above 2/3 of the height of the first partition wall, and the width of the first overflow groove is smaller than the width of the first partition wall; a first filter screen frame is arranged on a first partition wall body close to the side of the primary filtering anaerobic tank, and the first filter screen frame completely covers the end face of the first overflow trough close to the side of the primary filtering anaerobic tank; a communicating pipe for communicating the first overflow groove with the second-stage filtering anaerobic tank is arranged on the first partition wall, and a liquid discharge valve is arranged on the communicating pipe;
the second-stage filtering anaerobic tank is communicated with the aerobic tank through a pipeline, and a water pump is arranged on the pipeline; an air explosion device is arranged in the aerobic tank; the aerobic tank is communicated with the primary sedimentation tank through a pipeline, and a water pump is arranged on the pipeline;
the primary sedimentation tank and the secondary sedimentation tank are connected and arranged together with a partition wall, a second partition wall is arranged between the primary sedimentation tank and the secondary sedimentation tank, a second overflow groove is formed in the wall body of the second partition wall, which is close to the side of the primary sedimentation tank, the depth of the second overflow groove formed in the second partition wall along the horizontal direction is 1/3-2/3 of the thickness of the second partition wall, the groove body of the second overflow groove is positioned above 2/3 of the height of the second partition wall, and the width of the second overflow groove is smaller than the width of the second partition wall; and a second filter screen frame is arranged on a second partition wall body close to the side of the primary sedimentation tank, the second filter screen frame completely covers the end surface of the second overflow groove close to the side of the primary sedimentation tank, a communicating pipe for communicating the second overflow groove with the secondary sedimentation tank is arranged on the second partition wall, and a liquid discharge valve is arranged on the communicating pipe.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the heating rod is installed in the aerobic tank, the heat preservation mechanism is arranged on the aerobic tank and comprises a sunlight shed and a heat preservation cloth layer, the sunlight shed is fixedly installed right above the aerobic tank, and the heat preservation cloth layer covers the aerobic tank.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the heat-insulating cloth layer consists of an inner heat-insulating layer and an outer waterproof layer; be equipped with waterproof sleeve pipe on the heating rod, waterproof sheathed tube bottom fixed connection is on the mount pad of heating rod, and the power supply line of heating rod passes from waterproof sleeve pipe.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the gas blasting device comprises an air blower and a gas conveying pipeline, the gas conveying pipeline is connected with a gas outlet of the air blower, gas blasting heads are mounted on the gas conveying pipeline and are uniformly arranged on the gas conveying pipeline at intervals, a three-way joint is fixedly mounted at a gas outlet of the air blower, pipe orifices at two ends of the gas conveying pipeline are fixedly connected to the three-way joint, and the gas conveying pipeline is uniformly distributed at the bottom of the aerobic pool.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the blower is a Roots blower, and the power of the Roots blower is 2.2 KW-7.5 KW.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the number of the aeration heads arranged at the bottom of the aerobic tank is not less than 1.5 per square meter.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the treatment system is also provided with an aerobic standby tank, and the aerobic standby tank and the aerobic tank are connected and arranged by a partition wall.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the first filter screen frame comprises a filter screen and a fixing frame for mounting the filter screen, and the second filter screen frame is identical to the first filter screen frame in structure.
Above the utility model relates to a pig manure sewage treatment plant, its further preferred technical scheme or technical characterstic are: the aperture of the filter screen is not more than 0.5 mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses an among the pig manure sewage treatment plant, utilize one-level filtration anaerobism pond and second grade filtration anaerobism pond to carry out precipitation filtration treatment to pig manure sewage, utilize good oxygen pond can carry out biodegradable to sewage and handle, utilize one-level sedimentation tank and second grade sedimentation tank to carry out precipitation filtration treatment once more to sewage at last, through the combination of many times precipitation filtration treatment and biodegradable treatment can effectively reduce the impurity and the organic matter of pig manure sewage, reduce the pollution degree to the environment, just the utility model discloses simple structure, low in manufacturing cost, but continuous operation, sewage treatment is efficient, sewage treatment capacity is big.
(2) The utility model discloses an among the pig manure sewage treatment plant, the heat preservation mechanism of constituteing by heat preservation cloth layer, sunshine canopy and heating rod on good oxygen pond can make the sewage in the good oxygen pond maintain the reproduction that is favorable to the microorganism at the suitable temperature, can accelerate sewage treatment's speed to the energy saving.
(3) The utility model discloses an among the pig manure sewage treatment plant, the head of exploding gas is installed on gas transmission pipeline, and gas transmission pipeline's both ends are connected with the air-blower through three way connection, and this makes gas transmission pipeline internal gas pressure invariable, has avoided the tolerance decay in the gas transmission pipeline, and the messenger explodes the gas effect better.
Drawings
Fig. 1 is a schematic top view of the present invention;
fig. 2 is a schematic view of an installation structure of the first filter frame in fig. 1.
Fig. 3 is a view from a in fig. 3.
FIG. 4 is a schematic view of the structure of the aerobic tank in FIG. 1;
in the figure, 1 is a collection anaerobic tank; 2 is a dry-wet separator; 3 is a first-stage filtering anaerobic tank; 4 is a second-stage filtering anaerobic tank; 5 is an aerobic tank; 6 is an aerobic standby tank; 7 is a first-stage sedimentation tank; 8 is a secondary sedimentation tank; 9 is a first filter screen frame; 10 is a heating rod; 11 is a heat-insulating cloth layer; 12 is an explosion head; 13 is a waterproof sleeve; 14 is a sunlight shed; 15 is a blower; 16 is a three-way joint; 17 is a second filter screen frame; 18 is a first overflow launder; reference numeral 19 denotes a first partition wall.
Detailed Description
The following detailed description of the present invention will be further described with reference to the accompanying drawings so as to enable those skilled in the art to further understand the present invention, and not to limit the claims.
Embodiment 1, refer to fig. 1, a pig manure sewage treatment plant comprises a collection anaerobic tank, a primary filtration anaerobic tank, a secondary filtration anaerobic tank, an aerobic tank, a primary sedimentation tank and a secondary sedimentation tank which are arranged in sequence;
a dry-wet separator is arranged between the collection anaerobic tank and the primary filtering anaerobic tank, a feed inlet of the dry-wet separator is communicated into the collection anaerobic tank through a feed pipeline, and a liquid discharge outlet of the dry-wet separator is communicated into the primary filtering anaerobic tank through a liquid outlet pipeline;
referring to fig. 2 and 3, the primary filtering anaerobic tank and the secondary filtering anaerobic tank are connected and share a partition wall, a first partition wall is arranged between the primary filtering anaerobic tank and the secondary filtering anaerobic tank, a first overflow groove is formed in a wall body of the first partition wall, which is close to the side of the primary filtering anaerobic tank, the depth of the first overflow groove formed in the first partition wall along the horizontal direction accounts for 1/2 of the thickness of the first partition wall, the bottom of a groove body of the first overflow groove is located at a position 4/5 of the height of the first partition wall, the width of the first overflow groove is smaller than that of the first partition wall, and the width of the first overflow groove can be 1/4 of the width of the first partition wall; a first filter screen frame is arranged on a first partition wall body close to the side of the primary filtering anaerobic tank, and the first filter screen frame completely covers the end face of the first overflow trough close to the side of the primary filtering anaerobic tank; the first partition wall is provided with a communicating pipe for communicating the first overflow groove with the second-stage filtration anaerobic tank, the communicating pipe is provided with a drain valve, the communicating pipe can be extended into the second-stage filtration anaerobic tank, and the drain valve is arranged on the communicating pipe in the second-stage filtration anaerobic tank.
The second-stage filtering anaerobic tank is communicated with the aerobic tank through a pipeline, and a water pump is arranged on the pipeline; an aeration device is arranged in the aerobic tank and is used for fully aerating the aerobic tank 5; the aerobic tank is communicated with the primary sedimentation tank through a pipeline, and a water pump is arranged on the pipeline;
the primary sedimentation tank and the secondary sedimentation tank are connected and arranged in a partition wall manner, a second partition wall is arranged between the primary sedimentation tank and the secondary sedimentation tank, a second overflow groove is formed in the wall body of the second partition wall, which is close to the side of the primary sedimentation tank, the depth of the second overflow groove formed in the second partition wall along the horizontal direction accounts for 1/2 of the thickness of the second partition wall, the bottom of the groove body of the second overflow groove is positioned at the position 4/5 of the height of the second partition wall, the width of the second overflow groove is smaller than that of the second partition wall, and the width of the second overflow groove can be set to be 1/4 of the width of the second partition wall; the second filter screen frame is arranged on a second partition wall body close to the side of the first-stage sedimentation tank, the second filter screen frame completely covers the end face of the second overflow groove close to the side of the first-stage sedimentation tank, a communicating pipe for communicating the second overflow groove with the second-stage sedimentation tank is arranged on the second partition wall, a drain valve is arranged on the communicating pipe, the communicating pipe can extend into the second-stage sedimentation tank, and the drain valve is arranged on the communicating pipe in the second-stage sedimentation tank.
The aperture of the filter screen on the first filter screen frame and the aperture of the filter screen on the second filter screen frame are both 0.5 mm. Can make first overflow launder and second overflow launder all upwards extend and link up first partition wall and second partition wall, conveniently observe the filter effect of filter screen frame like this, also make the clearance in the overflow launder more convenient.
Example 2, in a swine waste water treatment apparatus described in example 1: the aperture of the filter screen is 0.425 mm. Referring to fig. 4, a heating rod is installed in the aerobic tank, a heat preservation mechanism is arranged on the aerobic tank, the heat preservation mechanism comprises a sunlight shed and a heat preservation cloth layer, the sunlight shed is fixedly installed right above the aerobic tank, and the heat preservation cloth layer covers the aerobic tank. The temperature of the sewage in the aerobic tank is maintained between 10 ℃ and 60 ℃ by utilizing the sunlight shed 14 and the heat-preservation cloth layer 11, and the temperature interval can ensure that microorganisms can be rapidly propagated. When the temperature is too low in winter, the heating rod 10 is used for locally heating the aerobic tank 5, so that the temperature of the sewage in the aerobic tank is maintained between 10 and 60 ℃.
Example 3, example 1 or 2, a swine waste water treatment apparatus: the aperture of the filter screen is 0.3 mm. The heat-insulating cloth layer consists of an inner heat-insulating layer and an outer waterproof layer; be equipped with waterproof sleeve pipe on the heating rod, waterproof sheathed tube bottom fixed connection is on the mount pad of heating rod, and the power supply line of heating rod passes from waterproof sleeve pipe. A large amount of foam is generated when the aerobic tank 5 is aerated, and the heat-insulating cloth layer 11 can also play a role in eliminating the foam when covering the aerobic tank 5; the waterproof sleeve 13 is mainly used to isolate the heating rod 10 wires from the foam, preventing the wires from being corroded.
Example 4, the pig manure wastewater treatment device described in example 1, example 2 or example 3: the aperture of the filter screen is 0.25 mm. Referring to fig. 4, the gas explosion device comprises a blower and a gas transmission pipeline, the gas transmission pipeline is connected with a gas outlet of the blower, gas explosion heads are installed on the gas transmission pipeline and are uniformly arranged on the gas transmission pipeline at intervals, a three-way joint is fixedly installed at a gas outlet of the blower, pipe orifices at two ends of the gas transmission pipeline are fixedly connected to the three-way joint, and the gas transmission pipeline is uniformly distributed at the bottom of the aerobic pool.
Embodiment 5, in any one of embodiment 1 to 4, a swine waste water treatment apparatus: the aperture of the filter screen is 0.18 mm. The blower is a Roots blower, and the power of the Roots blower is 2.2 KW.
Embodiment 6, in any one of embodiment 1 to 5, a swine waste water treatment apparatus: the aperture of the filter screen is 0.15 mm. The number of the aeration heads arranged at the bottom of the aerobic tank is 2 per square meter, so that sewage in the tank can be fully aerated.
Embodiment 7, in any one of embodiment 1 to 6, a swine waste water treatment apparatus: the aperture of the filter screen is 0.09 mm. The treatment system is also provided with an aerobic standby tank, and the aerobic standby tank and the aerobic tank are connected and arranged by a partition wall. When the aerobic tank 5 needs dredging, the equipment in the aerobic tank 5 is moved to the aerobic standby tank 6, and the sewage in the secondary filtering anaerobic tank 4 is pumped into the aerobic standby tank 6 by a water pump for treatment.
Embodiment 8, in any one of embodiment 1 to 7, a swine waste water treatment apparatus: the first filter screen frame and the second filter screen frame are identical in structure and are composed of a fixing frame and a filter screen, the filter screen is fixedly connected to the fixing frame, and the fixing frame, the first intermediate partition wall and the second intermediate partition wall are arranged in a close proximity mode, so that sewage can only flow into the overflow groove 5 from the filter screen.
The utility model discloses during the use, collect pig manure sewage in the collection anaerobism pond, after a period of biodegradable, isolate sewage by wet separator futilely and pour into the one-level filtration anaerobism pond, sewage is because violent stirring is very muddy in the one-level filtration anaerobism pond this moment, so need earlier to close communicating epaxial flowing back valve on the first partition wall, wait in the one-level filtration anaerobism pond to open the flowing back valve again after sewage deposits and make the sewage supernatant flow in first overflow launder after first filter screen frame filters, the rethread is in communicating pipe flows into the second grade filtration sedimentation tank. At the moment, the pig manure sewage separated from the collection anaerobic tank can be continuously and slowly injected into the first-stage filtration anaerobic tank, so that the aim of continuous work is fulfilled. And after the sewage is fully precipitated in the secondary filtering and precipitating tank, controlling a water pump to pump the sewage supernatant in the secondary filtering anaerobic tank into the aerobic tank from top to bottom, carrying out aerobic biodegradation treatment by using an aeration device in the aerobic tank, and stopping injecting the sewage into the aerobic tank after the aerobic tank is full. After the sewage is subjected to full biodegradation treatment in the aerobic tank, the sewage is pumped into the primary sedimentation tank by the water pump for sedimentation treatment, at the moment, a drain valve on a communicating pipe between the primary sedimentation tank and the secondary sedimentation tank is closed, after the sewage is fully precipitated in the primary sedimentation tank, the drain valve is opened to enable the sewage to flow into the second overflow tank through the second filter screen frame, and the sewage flows into the secondary sedimentation tank through the communicating pipe for sedimentation treatment again. After full precipitation in the second-stage sedimentation tank, closing a valve between the first-stage sedimentation tank and the second-stage sedimentation tank, disinfecting and sterilizing sewage in the second-stage sedimentation tank, and discharging or reusing the sewage after reaching the standard for washing the pigsty.
Claims (9)
1. The utility model provides a processing apparatus of pig manure sewage which characterized in that: comprises a collection anaerobic tank, a primary filtration anaerobic tank, a secondary filtration anaerobic tank, an aerobic tank, a primary sedimentation tank and a secondary sedimentation tank which are arranged in sequence;
a dry-wet separator is arranged between the collection anaerobic tank and the primary filtering anaerobic tank, a feed inlet of the dry-wet separator is communicated into the collection anaerobic tank through a feed pipeline, and a liquid discharge outlet of the dry-wet separator is communicated into the primary filtering anaerobic tank through a liquid outlet pipeline;
the first-stage filtering anaerobic tank and the second-stage filtering anaerobic tank are connected and arranged in a partition wall, a first partition wall is arranged between the first-stage filtering anaerobic tank and the second-stage filtering anaerobic tank, a first overflow groove is formed in the wall body of the first partition wall, which is close to the side of the first-stage filtering anaerobic tank, the depth of the first overflow groove in the horizontal direction on the first partition wall is 1/3-2/3 of the thickness of the first partition wall, the groove body of the first overflow groove is positioned above 2/3 of the height of the first partition wall, and the width of the first overflow groove is smaller than the width of the first partition wall; a first filter screen frame is arranged on a first partition wall body close to the side of the primary filtering anaerobic tank, and the first filter screen frame completely covers the end face of the first overflow trough close to the side of the primary filtering anaerobic tank; a communicating pipe for communicating the first overflow groove with the second-stage filtering anaerobic tank is arranged on the first partition wall, and a liquid discharge valve is arranged on the communicating pipe;
the second-stage filtering anaerobic tank is communicated with the aerobic tank through a pipeline, and a water pump is arranged on the pipeline; an air explosion device is arranged in the aerobic tank; the aerobic tank is communicated with the primary sedimentation tank through a pipeline, and a water pump is arranged on the pipeline;
the primary sedimentation tank and the secondary sedimentation tank are connected and arranged together with a partition wall, a second partition wall is arranged between the primary sedimentation tank and the secondary sedimentation tank, a second overflow groove is formed in the wall body of the second partition wall, which is close to the side of the primary sedimentation tank, the depth of the second overflow groove formed in the second partition wall along the horizontal direction is 1/3-2/3 of the thickness of the second partition wall, the groove body of the second overflow groove is positioned above 2/3 of the height of the second partition wall, and the width of the second overflow groove is smaller than the width of the second partition wall; and a second filter screen frame is arranged on a second partition wall body close to the side of the primary sedimentation tank, the second filter screen frame completely covers the end surface of the second overflow groove close to the side of the primary sedimentation tank, a communicating pipe for communicating the second overflow groove with the secondary sedimentation tank is arranged on the second partition wall, and a liquid discharge valve is arranged on the communicating pipe.
2. The device for treating the pig manure wastewater as recited in claim 1, wherein: the heating rod is installed in the aerobic tank, the heat preservation mechanism is arranged on the aerobic tank and comprises a sunlight shed and a heat preservation cloth layer, the sunlight shed is fixedly installed right above the aerobic tank, and the heat preservation cloth layer covers the aerobic tank.
3. The device for treating the pig manure wastewater as recited in claim 2, wherein: the heat-insulating cloth layer consists of an inner heat-insulating layer and an outer waterproof layer; be equipped with waterproof sleeve pipe on the heating rod, waterproof sheathed tube bottom fixed connection is on the mount pad of heating rod, and the power supply line of heating rod passes from waterproof sleeve pipe.
4. The device for treating the pig manure wastewater as recited in claim 1, wherein: the gas blasting device comprises an air blower and a gas conveying pipeline, the gas conveying pipeline is connected with a gas outlet of the air blower, gas blasting heads are mounted on the gas conveying pipeline and are uniformly arranged on the gas conveying pipeline at intervals, a three-way joint is fixedly mounted at a gas outlet of the air blower, pipe orifices at two ends of the gas conveying pipeline are fixedly connected to the three-way joint, and the gas conveying pipeline is uniformly distributed at the bottom of the aerobic pool.
5. The device for treating pig manure sewage as claimed in claim 4, wherein: the blower is a roots blower.
6. The device for treating pig manure sewage as claimed in claim 4, wherein: the number of the aeration heads arranged at the bottom of the aerobic tank is not less than 1.5 per square meter.
7. The device for treating the pig manure wastewater as recited in claim 1, wherein: the treatment system is also provided with an aerobic standby tank, and the aerobic standby tank and the aerobic tank are connected and arranged by a partition wall.
8. The device for treating the pig manure wastewater as recited in claim 1, wherein: the first filter screen frame comprises a filter screen and a fixing frame for mounting the filter screen, and the second filter screen frame is identical to the first filter screen frame in structure.
9. The apparatus for treating swine waste water according to claim 8, wherein: the aperture of the filter screen is not more than 0.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920371714.1U CN210438567U (en) | 2019-03-22 | 2019-03-22 | Treatment device for pig manure sewage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920371714.1U CN210438567U (en) | 2019-03-22 | 2019-03-22 | Treatment device for pig manure sewage |
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| Publication Number | Publication Date |
|---|---|
| CN210438567U true CN210438567U (en) | 2020-05-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920371714.1U Expired - Fee Related CN210438567U (en) | 2019-03-22 | 2019-03-22 | Treatment device for pig manure sewage |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809646A (en) * | 2019-03-22 | 2019-05-28 | 连云港市连威农牧科技有限公司 | A kind of pig excrement and sewage processing unit and method |
-
2019
- 2019-03-22 CN CN201920371714.1U patent/CN210438567U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109809646A (en) * | 2019-03-22 | 2019-05-28 | 连云港市连威农牧科技有限公司 | A kind of pig excrement and sewage processing unit and method |
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