Livestock manure liquid solid-liquid separation method, livestock manure liquid solid-liquid separation device and application of livestock manure liquid solid-liquid separation device in dehydrated livestock manure fermentation process

Abstract

The invention discloses a livestock manure liquid solid-liquid separation method, a livestock manure liquid solid-liquid separation device and application of the livestock manure liquid solid-liquid separation device in a dehydrated livestock manure fermentation process, and belongs to the technical field of livestock manure fertilizer.The livestock manure liquid solid-liquid separation method comprises the following steps that S1, livestock manure is collected, solid-liquid separation is conducted on the livestock manure, livestock manure residues are separated out, and the livestock manure residues are obtained; livestock manure liquid is obtained; s2, capturing tiny suspended solids and organic fibers in the livestock manure liquid by using a fiber capturing base to obtain the livestock manure liquid which does not contain the tiny suspended solids and the organic fibers; and S3, sucking the livestock manure liquid which does not contain the tiny suspended solids and the organic fibers into a wall-breaking separator, and separating out manure cakes and separated liquid for subsequent microbial fermentation. According to the solid-liquid separation method for the livestock manure liquid, the problem that solid and liquid are difficult to separate after the livestock manure liquid is sucked to a wall-breaking separator can be solved, the water content of manure cakes is greatly reduced, and subsequent microbial fermentation is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of livestock manure fertilizerization, and in particular to a livestock manure liquid-solid-liquid separation method, a livestock manure liquid-solid-liquid separation device and applications thereof in a dehydrated livestock manure fermentation process. Background Art

[0002] Livestock manure refers to a mixture of livestock manure, urine excrement and flushing sewage. The treatment of livestock manure is one of the most troublesome problems for farms, and fertilizerization is one of the main resource utilization methods for livestock manure treatment. Among them, the mode of collecting and returning all manure to the fields is an important way to turn livestock manure into fertilizer. This mode specifically collects the livestock manure, urine excrement and sewage generated by the farm first, and then stores them all in oxidation ponds. The livestock manure is harmlessly treated through the oxidation ponds and used in farmland during the fertilization season. Although the main advantages of this model are low construction costs for manure collection, treatment and storage facilities, and low treatment costs; in addition, feces and sewage are collected in full, and the nutrient utilization rate is high; however, this model also has significant shortcomings: the storage period of livestock and poultry manure generally takes more than half a year, and sufficient land is required to build oxidation pond storage facilities; the fertilization period is relatively concentrated, and it is also necessary to support specialized mixing equipment, fertilization machinery, farmland application pipelines, etc., so the production of organic fertilizers using this model is often inefficient, ineffective, and too costly. In addition, since the water content of most fresh livestock and poultry manure is greater than 80%, and the excessively high water content during storage in oxidation pond composting is not conducive to microbial fermentation, the production cycle of livestock and poultry manure fertilizer is long and inefficient. For this reason, it is necessary to propose a new way of livestock and poultry manure fertilizer to solve this technical problem. For this reason, the present application proposes a method for solid-liquid separation of livestock and poultry manure liquid, and its application in a dehydrated livestock and poultry manure fermentation process. Summary of the invention

[0003] As described in the above-mentioned prior art, one of the purposes of the present invention is to provide a method for solid-liquid separation of livestock and poultry manure liquid, which can solve the problem that solid-liquid separation is difficult after the livestock and poultry manure liquid is pumped into the wall-breaking separator, greatly reduces the water content of the manure cake, and is conducive to subsequent microbial fermentation.

[0004] The second purpose of the present invention is to provide a method for solid-liquid separation of livestock manure and its application in the dehydrated livestock manure fermentation process. The livestock manure fertilizer production cycle using this method is short, efficient, and low in cost, and organic solid fertilizer and organic liquid fertilizer can be produced simultaneously.

[0005] The third purpose of the present invention is to provide a solid-liquid separation device for livestock and poultry manure, which can perform solid-liquid separation of livestock and poultry manure, solve the problem that the solid and liquid are difficult to separate after the livestock and poultry manure is pumped into the wall-breaking separator, greatly reduce the water content of the manure cake, and is conducive to subsequent microbial fermentation.

[0006] One of the purposes of the present invention is achieved by the following technical solution:

[0007] A method for solid-liquid separation of livestock manure comprises the following steps:

[0008] S1, collecting livestock manure, performing solid-liquid separation on the livestock manure, separating livestock manure residue, and obtaining livestock manure liquid;

[0009] S2, capturing the micro suspended matter and organic fibers in the livestock manure liquid with a fiber capturing base to obtain livestock manure liquid free of micro suspended matter and organic fibers;

[0010] S3, the livestock manure liquid containing no tiny suspended matter and organic fiber is pumped into a wall-breaking separator to separate the manure cake and the separated liquid, and the manure cake and the livestock manure liquid are used for subsequent microbial fermentation to achieve solid-liquid separation of the livestock manure liquid.

[0011] Furthermore, in step S1, a mechanical grill is used to separate the livestock manure from solid and liquid to separate the livestock manure residue.

[0012] Furthermore, in step S1, a deodorizing bacteria liquid is added to the livestock manure to eliminate the odor of the livestock manure.

[0013] Furthermore, after step S1, hydrolyzing bacteria liquid is added to the livestock manure liquid to hydrolyze insoluble organic matter in the livestock manure liquid into soluble organic matter, and then step S2 is performed.

[0014] Furthermore, in step S3, the livestock manure liquid that does not contain tiny suspended matter and organic fiber is pumped into the wall-breaking separator via a diaphragm pump.

[0015] Furthermore, in step S1, the livestock manure is collected and poured into a pulping tank to be fully dissolved. After dissolution, a mechanical grid is used to separate the livestock manure into solid and liquid to separate the livestock manure residue.

[0016] The second object of the present invention is achieved by adopting the following technical solution:

[0017] A method for solid-liquid separation of livestock manure is used in a dehydrated livestock manure fermentation process. The livestock manure residue and the manure cake are mixed and crushed, and then subjected to microbial fermentation to obtain organic solid fertilizer.

[0018] Furthermore, the separated liquid is injected into an aerobic contact fermentation tank, oxygen is supplied by a blower, EM bacterial liquid is added for fermentation, and the separated liquid can be used as an organic liquid fertilizer after fermentation and maturity.

[0019] The third object of the present invention is achieved by adopting the following technical solution:

[0020] A livestock manure liquid solid-liquid separation device comprises a pulping tank, a livestock manure solid-liquid separation device, a hydrolysis tank, and a fiber capturing tank which are connected in sequence; the pulping tank is used to pulp the livestock manure, the livestock manure solid-liquid separation device is used to perform solid-liquid separation on the livestock manure, the hydrolysis tank contains the livestock manure liquid, and is used to add the hydrolysis bacteria liquid to the hydrolysis tank to hydrolyze the insoluble and biodegradable organic matter in the livestock manure liquid into the soluble and biodegradable organic matter, the fiber capturing base is arranged in the fiber capturing tank to capture the tiny suspended matter and organic fiber in the livestock manure liquid, and the fiber capturing tank is connected to the wall breaking separator.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] (1) The present invention provides a method for solid-liquid separation of livestock manure liquid, in which tiny suspended matter and organic fibers in the livestock manure liquid are captured by a fiber capturing base. Since the tiny suspended matter and organic fibers are water-absorbing substances, they can be separated in advance to solve the problem that the solid-liquid separation is difficult after the livestock manure liquid is sucked into the wall-breaking separator, thereby greatly reducing the water content of the manure cake and facilitating subsequent microbial fermentation.

[0023] (2) The present invention provides a method for separating solids from livestock manure liquid and its application in a dehydrated livestock manure fermentation process. Before the dehydrated livestock manure fermentation process, the method can solve the problem that the solid and liquid are difficult to separate after the livestock manure liquid is pumped into a wall-breaking separator, thereby greatly reducing the water content of the manure cake, which is beneficial to subsequent microbial fermentation. The livestock manure residue and the manure cake are mixed, crushed, and subjected to microbial fermentation to obtain organic solid fertilizer. The separated liquid is injected into an aerobic contact fermentation tank, oxygen is supplied by a blower, and EM bacterial liquid is added for fermentation. After fermentation, the separated liquid can be used as an organic liquid fertilizer. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0025] Figure 1 It is a schematic diagram of the structure of the livestock manure fertilizer conversion device provided in Example 3. DETAILED DESCRIPTION

[0026] The present invention is further described below in conjunction with specific embodiments. It should be noted that, under the premise of no conflict, the embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0027] Example 1

[0028] This embodiment provides a method for solid-liquid separation of livestock manure, comprising the following steps:

[0029] S1, collecting livestock manure, pouring the livestock manure into a slurrying tank to fully dissolve it, and after dissolution, using a mechanical grid to separate the livestock manure into solid and liquid, separating the livestock manure residue, and obtaining livestock manure liquid;

[0030] S2, adding hydrolytic bacteria liquid to the livestock manure liquid to hydrolyze the insoluble organic matter in the livestock manure liquid into soluble organic matter;

[0031] S3, capturing the micro suspended matter and organic fiber in the livestock manure liquid with a fiber capturing base to obtain the livestock manure liquid free of micro suspended matter and organic fiber, and pumping the livestock manure liquid free of micro suspended matter and organic fiber into a wall-breaking separator through a diaphragm pump;

[0032] Fiber capture matrix is ​​a type of material that can capture tiny suspended matter and organic fibers, such as elephant grass fibers.

[0033] S4. The livestock and poultry manure liquid that does not contain tiny suspended matter and organic fiber is pumped into the wall-breaking separator to separate the manure cake and the separated liquid. The manure cake and the livestock and poultry manure liquid are used for subsequent microbial fermentation to achieve solid-liquid separation of the livestock and poultry manure liquid.

[0034] The deodorizing bacterial liquid is a composite Bacillus liquid, including Bacillus subtilis, Bacillus licheniformis, Bacillus cereus, etc. The fecal odor mainly contains pungent and harmful gases such as ammonia and hydrogen sulfide. It can absorb and utilize ammonia and hydrogen sulfide in sewage, reduce the diffusion of these harmful and pungent gases, and achieve the deodorizing effect.

[0035] The hydrolyzed bacterial liquid is a composite Bacillus liquid including Bacillus subtilis, Bacillus licheniformis and Bacillus cereus, which is rich in biological enzymes such as protease and lipase, and can decompose and convert the insoluble substances in the poultry and livestock manure into soluble substances.

[0036] Example 2

[0037] The present embodiment provides an application of a livestock manure liquid-solid-liquid separation method in a dehydrated livestock manure fermentation process, wherein livestock manure residue and manure cake are mixed, crushed, and subjected to microbial fermentation to obtain organic solid fertilizer.

[0038] In addition, the separated liquid is injected into an aerobic contact fermentation tank, oxygen is supplied by a blower, and EM bacterial liquid is added for fermentation. When the fermentation is mature, it can be used as organic liquid fertilizer.

[0039] EM bacterial solution is a mixed bacteria, generally including photosynthetic bacteria, yeast, lactic acid bacteria, actinomycetes and other beneficial bacteria.

[0040] Example 3

[0041] See also Figure 1 This embodiment provides a livestock manure fertilizer-making device, and a livestock manure liquid solid-liquid separation device as a part of it, which can separate the solid and liquid of livestock manure liquid, solve the problem that the solid and liquid are difficult to separate after the livestock manure liquid is sucked into the wall-breaking separator, greatly reduce the water content of the manure cake, and is conducive to subsequent microbial fermentation. The livestock manure fertilizer device comprises a pulping tank, a livestock manure solid-liquid separation device, a hydrolysis tank, a fiber catching tank, a wall-breaking separator, a turning tank, an aerobic contact fermentation tank, and a blower, which are connected in sequence. The pulping tank is used for pulping livestock manure, the livestock manure solid-liquid separation device is used for solid-liquid separation of livestock manure, the hydrolysis tank contains livestock manure liquid, which is used for adding hydrolysis bacteria liquid into the hydrolysis tank to hydrolyze insoluble organic matter in the livestock manure liquid into soluble organic matter, the fiber catching tank is provided with a fiber catching base for capturing tiny suspended matter and organic fiber in the livestock manure liquid, and the fiber catching tank is connected to the wall-breaking separator; the turning tank is used for mixing livestock manure residue and manure cake, crushing them, and performing microbial fermentation to obtain organic solid fertilizer after fermentation; the aerobic contact fermentation tank is used for EM bacterial liquid fermentation, the blower is used for oxygen supply, and the organic liquid fertilizer can be used after fermentation and maturity.

[0042] The blower provides oxygen for microorganisms to carry out metabolic activities, and can control the fermentation reaction temperature and improve gas production efficiency.

[0043] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A method for solid-liquid separation of livestock manure, characterized in that: The following steps are involved: S1, collecting livestock manure, performing solid-liquid separation on the livestock manure, separating livestock manure residue, and obtaining livestock manure liquid; S2, capturing the micro suspended matter and organic fibers in the livestock manure liquid with a fiber capturing base to obtain livestock manure liquid free of micro suspended matter and organic fibers; S3, the livestock manure liquid without tiny suspended matter and organic fiber is sucked into the wall-breaking separator, and the manure cake and separated liquid are separated, and the manure cake and the livestock manure liquid are used for subsequent microbial fermentation to achieve solid-liquid separation of the livestock manure liquid 。 2. A method for solid-liquid separation of livestock manure according to claim 1, characterized in that: In step S1, a mechanical grill is used to separate the livestock manure from solid and liquid to separate the livestock manure residue.

3. A method for solid-liquid separation of livestock manure as claimed in claim 2, characterized in that: In step S1, a deodorizing bacteria liquid is added to the livestock manure to eliminate the odor of the livestock manure.

4. A method for solid-liquid separation of livestock manure as claimed in claim 3, characterized in that: After step S1, hydrolyzing bacteria liquid is added to the livestock manure liquid to hydrolyze the insoluble organic matter in the livestock manure liquid into soluble organic matter, and then step S2 is performed.

5. A method for solid-liquid separation of livestock manure as claimed in claim 4, characterized in that: In step S3, the livestock manure liquid that does not contain tiny suspended matter and organic fiber is pumped into the wall-breaking separator via a diaphragm pump.

6. A method for solid-liquid separation of livestock manure as claimed in claim 5, characterized in that: In step S1, the livestock manure is collected and poured into a pulping tank to be fully dissolved. After dissolution, a mechanical grid is used to separate the livestock manure into solid and liquid to separate the livestock manure residue.

7. Application of the method for solid-liquid separation of livestock manure according to any one of claims 1 to 6 in a dehydrated livestock manure fermentation process, characterized in that: The following steps are involved: The livestock manure residue and the manure cake are mixed, crushed, and fermented by the microorganisms to obtain organic solid fertilizer.

8. Application of the method for solid-liquid separation of livestock manure as claimed in claim 7 in a dehydrated livestock manure fermentation process, characterized in that: The separated liquid is injected into an aerobic contact fermentation tank, oxygen is supplied by a blower, EM bacterial liquid is added for fermentation, and the separated liquid can be used as an organic liquid fertilizer when the fermentation is mature.

9. A solid-liquid separation device for livestock manure, characterized in that: It includes a pulping tank, a livestock manure solid-liquid separation device, a hydrolysis tank, and a fiber capturing tank which are connected in sequence; the pulping tank is used to pulp the livestock manure, the livestock manure solid-liquid separation device is used to perform solid-liquid separation on the livestock manure, the hydrolysis tank contains the livestock manure liquid, and is used to add the hydrolysis bacteria liquid into the hydrolysis tank to hydrolyze the insoluble and biodegradable organic matter in the livestock manure liquid into the soluble and biodegradable organic matter, the fiber capturing base is arranged in the fiber capturing tank to capture the tiny suspended matter and organic fiber in the livestock manure liquid, and the fiber capturing tank is connected to the wall breaking separator.

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