CN108892547A - A kind of recycling processing method of high-moisture percentage livestock and poultry feces - Google Patents
A kind of recycling processing method of high-moisture percentage livestock and poultry feces Download PDFInfo
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- CN108892547A CN108892547A CN201810949086.0A CN201810949086A CN108892547A CN 108892547 A CN108892547 A CN 108892547A CN 201810949086 A CN201810949086 A CN 201810949086A CN 108892547 A CN108892547 A CN 108892547A
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F3/00—Fertilisers from human or animal excrements, e.g. manure
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- C—CHEMISTRY; METALLURGY
- C05—FERTILISERS; MANUFACTURE THEREOF
- C05F—ORGANIC FERTILISERS NOT COVERED BY SUBCLASSES C05B, C05C, e.g. FERTILISERS FROM WASTE OR REFUSE
- C05F17/00—Preparation of fertilisers characterised by biological or biochemical treatment steps, e.g. composting or fermentation
- C05F17/50—Treatments combining two or more different biological or biochemical treatments, e.g. anaerobic and aerobic treatment or vermicomposting and aerobic treatment
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
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Abstract
The invention discloses a kind of recycling processing methods of high-moisture percentage livestock and poultry feces, include the following steps：Livestock and poultry feces are sent into vertical digester by step 1；Step 2, decomposed specific enzyme bacterium complexing agent are activated；Decomposed specific enzyme bacterium complexing agent after gained activation in step 2 is added in fermentor step 3；Resulting material in step 3 is made material enter conditioning tank by step 4 by auto discharging system；Step 5 is added conditioner, is stirred evenly；Livestock and poultry feces after adjusting are separated by solid-liquid separation by step 6 by step 5 resulting material with plate and frame filter press, and filter cake and filtrate is made and stores；Step 7, filter cake processing；Step 8, filtrate processing；Step 9, control filtrate adjust padding moisture, material are sufficiently mixed；Step 10 is stablized to temperature of charge, sprays filtrate daily, carry out turning over throwing after spray；All paddings after 1 year, are cleared out direct returning to farmland from fermentation house or carry out deep processing as organic fertilizer raw material by step 11.
Description
Technical field
The present invention relates to a kind for the treatment of for cow manure method, the recycling treatment side of specifically a kind of high-moisture percentage livestock and poultry feces
Method.
Background technique
In recent years, scale animal and poultry cultivation industry in China's is fast-developing, it has also become the most active growth point of rural economy, but
The yield of the wastes such as feces of livestock and poultry, sewage also increases sharply, in addition Pollution from livestock and poultry preventing and controlling relatively lag behind, pollution
Problem is on the rise.2010《National contamination sources generally investigate bulletin for the first time》It has been shown that, the main water pollutant row of livestock and poultry breeding industry
High-volume middle COD（COD）1268.26 ten thousand t, total nitrogen（TN）102.48 ten thousand t, total phosphorus（TP）16.04 ten thousand t, account for agricultural respectively
The main water pollution discharge in source（It is lost）95.78%, 37.89%, the 56.34% of amount.This shows to pollute caused by livestock and poultry breeding industry
As the hot spot for influencing entire society's environmental protection another after industrial pollution, focal issue.
Feces of livestock and poultry is divided into solid-state by moisture content（Moisture content < 70%）, semisolid（Moisture content 70%~80%）, semi liquid state
（Moisture content 80%~90%）, liquid（Moisture content > 90%）.Semi liquid state, liquid excrement for high-moisture percentage, existing processing technique
Mode mainly uses following several：（1）Waste total crop return, liquid dung Fertilizer Transformed utilize, major advantage be waste collect, processing,
Storage facilities construction cost is low, and processing is relatively low using expense, but has the following disadvantages：Waste storage period one is long, needs foot
Enough land development oxidation pond storage facilities；The mating certain farmland area in periphery；Fertilizer application period is relatively concentrated, and mating specialized stir is needed
Mixing equipment, fertilizer machinery, using in farmland pipe network etc.；Waste long-distance transportation is costly, can only apply in a certain range.（2）
Waste recovery energy：Major advantage is to reduce small-scale farm to the excrement and liquid dung collection and uniform disposal of farm
The investment for the treatment of for cow manure facility；Specialization operation, recovery energy is high-efficient, but has the following disadvantages：One-time investment is high；Energy
Product-derived is big using difficulty；Biogas slurry yield is big, concentrates, and processing cost is higher, and mating subsequent processing is needed to utilize technique.（3）Excrement
Just compost, major advantage are that aerobic fermentation temperature is high, and more thoroughly, fermentation period is short for stool detection；Compost treatment improves
The added value of excrement.But it has the following disadvantages：Aerobic composting process is also easy to produce a large amount of foul smell；Need a large amount of auxiliary materials, auxiliary material purchase
It buys, freight height.（4）Qualified discharge, major advantage are realization qualified discharges after liquid dung advanced treating；It is big construction is not needed
Type liquid dung storage pool, can reduce the land used of waste storage facilities, but have the following disadvantages：Liquid dung processing cost is high, cultivates mostly
Field is difficult to bear.
Summary of the invention
The purpose of the present invention is to provide a kind of recycling processing methods of high-moisture percentage livestock and poultry feces, to solve above-mentioned back
The problem of being proposed in scape technology.
To achieve the above object, the present invention provides the following technical solutions：
A kind of recycling processing method of high-moisture percentage livestock and poultry feces, includes the following steps：
Livestock and poultry feces are transported to scratch pool by poultry house with totally-enclosed fecal suction truck, make object by automatical feeding system by step 1
Material enters in vertical hair or horizontal fermentation tank；
Step 2, decomposed specific enzyme bacterium complexing agent are activated, and decomposed specific enzyme bacterium complexing agent is before use, with warm water to decomposed special
It is activated with enzyme bacterium complexing agent, suspension is made, suspension is sufficiently stirred；
Decomposed specific enzyme bacterium complexing agent after gained activation in step 2 is added in vertical or horizontal fermentor, opens by step 3
Automatic oxygen system and the stirring system of exposing is opened the material in fermentor is carried out to expose oxygen and stirring, the aerobic dynamic fermentation of medium temperature constant temperature；
Resulting material in step 3 is made material enter conditioning tank by step 4 by auto discharging system；
Step 5 adds conditioner, 1 ‰~5 ‰ conditioner mother liquor is configured to water, then be added to adjusting in 10% ratio
Chi Zhong is stirred evenly, and adds conditioner in the ratio of material conditioner volume ratio a ten thousandth to 5/10000ths；
Livestock and poultry feces after adjusting are separated by solid-liquid separation by step 6 by step 5 resulting material with plate and frame filter press；
Filter cake pad is put in the fermentation tank in dystopy fermentation house, opens the turning in dystopy fermentation house by step 7, filter cake processing
Machine and spray thrower；
Step 8, filtrate processing, does initial padding for the mixture of rice husk and sawdust, and streptomyces microflavus and maize flour are pressed quality
Than 1:5~1：15 be uniformly mixed be made dystopy fermentation special bacteria agent, uniformly shed on padding；
Step 9, control filtrate adjust padding moisture 50%~60%, using turning machine, material are sufficiently mixed；
Step 10 is stablized to temperature of charge, starts spray filtrate daily, carries out turning over throwings after spray, when the reduction of padding height, need to make
It is supplemented with filter cake as padding；
All paddings after 1 year, are cleared out direct returning to farmland from fermentation house or carry out deep processing as organic fertilizer raw material by step 11,
It uses filter cake or addition part rice husk, sawdust as padding, repeats the above process.
As a further solution of the present invention：In the step 2, warm water temperature is controlled at 18-37 DEG C.
As further scheme of the invention：In the step 3, the material in fermentor is carried out to expose oxygen and stirring
While, heat temperature raising is carried out to material, until temperature need to rise to 30-40 DEG C.
As further scheme of the invention：The heating adds the material in fermentor using oil burning boiler
Heat.
As further scheme of the invention：The heating carries out the material in fermentor using electrically heated mode
Heating.
As further scheme of the invention：In the step 6, the livestock and poultry feces after separation are divided into filter cake and filtrate.
As further scheme of the invention：It is spare that the filter cake is temporarily stored into sunlight canopy.
As further scheme of the invention：The filtrate is temporarily stored into sump.
As further scheme of the invention：In the step 8, maize flour can be replaced wheat bran or powdered rice hulls.
Compared with prior art, the beneficial effects of the invention are as follows：This method ferments biofermentation, separation of solid and liquid, dystopy
It organically combines, realizes feces of farm zero discharge treatment, do not need the farmland of mating large area, do not need or only need minute quantity
Auxiliary material, construction investment is low, device integration and automatization level are high, flexible operation is convenient, operational and administrative expenses is low, occupied area
Small, resource utilization rate is high, realizes mutually unifying for economic benefit, social benefit and ecological benefits.
Detailed description of the invention
Fig. 1 is the process flow chart of the recycling treatment of high-moisture percentage livestock and poultry feces.
Fig. 2 is the schematic diagram of dystopy fermentation house in the recycling treatment of high-moisture percentage livestock and poultry feces.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with the embodiment of the present invention, it is clear that retouched
The embodiment stated is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work, belongs to the present invention
The range of protection.
Embodiment 1
A kind of recycling processing method of high-moisture percentage livestock and poultry feces, includes the following steps：
The livestock and poultry feces that moisture content is 90% or so are transported to scratch pool by poultry house with totally-enclosed fecal suction truck, passed through by step 1
Automatical feeding system enters material in vertical or horizontal fermentor；
Step 2, decomposed specific enzyme bacterium complexing agent are activated, and decomposed specific enzyme bacterium complexing agent uses first 2 hours, with warm water pair
Decomposed specific enzyme bacterium complexing agent is activated, and in mass ratio 1:5 are made suspension, and suspension is sufficiently stirred, wherein warm water temperature
Degree is 18 DEG C；
Decomposed specific enzyme bacterium complexing agent after gained activation in step 2 is added in vertical or horizontal fermentor, opens by step 3
It opens automatic oxygen system and the stirring system of exposing the material in fermentor is carried out to expose oxygen and stirring, while using oil burning boiler to material
Heat temperature raising reaches 30 DEG C to temperature, the aerobic dynamic fermentation 15h of medium temperature constant temperature；
Resulting material in step 3 is made material enter conditioning tank by step 4 by auto discharging system；
Step 5 adds conditioner, 1 ‰ conditioner mother liquor is configured to water, then be added in conditioning tank in 10% ratio,
It stirs evenly, adds conditioner in the ratio of material conditioner volume ratio a ten thousandth；
Livestock and poultry feces after adjusting are separated by solid-liquid separation in for 24 hours with plate and frame filter press, are produced by step 6 by step 5 resulting material
The filter cake of raw moisture content 65% or so and filtrate, wherein it is spare that filter cake is temporarily stored into sunlight canopy, subsequent as dystopy fermentation system
The supplement padding of system uses；Filtrate is temporarily stored into sump, later use dystopy fermentation system zero discharge treatment；
Filter cake pad is put in the fermentation tank in dystopy fermentation house, is made by the mixture of rice husk and sawdust by step 7, filter cake processing
For initial padding, pad sets the turning machine and spray thrower opened in dystopy fermentation house with a thickness of 1.4m, and turning machine cooperates line-shifting machine edge
Track above fermentation tank is moved to from a fermentation tank to carry out filter cake in another fermentation tank to turn over polishing working, and spray thrower is reciprocal
Filtrate in spray pond is sprayed on the padding in fermentation tank by movement；
Step 8, filtrate processing, by rice husk and sawdust in mass ratio 3:1 mixture does initial padding, by streptomyces microflavus with
Maize flour or wheat bran or powdered rice hulls in mass ratio 1:5 be uniformly mixed be made dystopy fermentation special bacteria agent, by 2m31kg is added in padding
Leavening is added in dystopy fermentation special bacteria agent, uniformly sheds on padding；
Step 9, control filtrate adjust padding moisture 50%, using turning machine, material are sufficiently mixed；
Step 10 starts spray filtrate daily, carries out turning over throwing, padding height after spraying 3h when temperature of charge is stablized at 50 DEG C
When reducing 10cm, filter cake need to be used to be supplemented as padding；
All paddings after 1 year, are cleared out direct returning to farmland from fermentation house or carry out deep processing as organic fertilizer raw material by step 11,
Filter cake or addition part rice husk, sawdust is used to repeat the above process without adding fermenting agent as padding, continue to run micro- life
Object dystopy fermentation system handles livestock and poultry feces.
Embodiment 2
A kind of recycling processing method of high-moisture percentage livestock and poultry feces, includes the following steps：
The livestock and poultry feces that moisture content is 90% or so are transported to scratch pool by poultry house with totally-enclosed fecal suction truck, passed through by step 1
Automatical feeding system enters material in vertical or horizontal fermentor；
Step 2, decomposed specific enzyme bacterium complexing agent are activated, and decomposed specific enzyme bacterium complexing agent uses first 2 hours, with warm water pair
Decomposed specific enzyme bacterium complexing agent is activated, and in mass ratio 1:10 are made suspension, and suspension is sufficiently stirred, wherein warm water temperature
It is 28 DEG C；
Decomposed specific enzyme bacterium complexing agent after gained activation in step 2 is added in vertical or horizontal fermentor, opens by step 3
It opens automatic oxygen system and the stirring system of exposing the material in fermentor is carried out to expose oxygen and stirring, while material is added using electric heating
Heat heating, reaches 35 DEG C to temperature, the aerobic dynamic fermentation 20h of medium temperature constant temperature；
Resulting material in step 3 is made material enter conditioning tank by step 4 by auto discharging system；
Step 5 adds conditioner, 3 ‰ conditioner mother liquor is configured to water, then be added in conditioning tank in 10% ratio,
It stirs evenly, adds conditioner in the ratio of material conditioner volume ratio 3/10000ths；
Livestock and poultry feces after adjusting are separated by solid-liquid separation in for 24 hours with plate and frame filter press, are produced by step 6 by step 5 resulting material
The filter cake of raw moisture content 65% or so and filtrate, wherein it is spare that filter cake is temporarily stored into sunlight canopy, subsequent as dystopy fermentation system
The supplement padding of system uses；Filtrate is temporarily stored into sump, later use dystopy fermentation system zero discharge treatment；
Filter cake pad is put in the fermentation tank in dystopy fermentation house, is made by the mixture of rice husk and sawdust by step 7, filter cake processing
For initial padding, pad sets the turning machine and spray thrower opened in dystopy fermentation house with a thickness of 1.4m, and turning machine cooperates line-shifting machine edge
Track above fermentation tank is moved to from a fermentation tank to carry out filter cake in another fermentation tank to turn over polishing working, and spray thrower is reciprocal
Waste in spray pond is sprayed on the padding in fermentation tank by movement；
Step 8, filtrate processing, by rice husk and sawdust in mass ratio 7:3 mixture does initial padding, by streptomyces microflavus with
Maize flour or wheat bran or powdered rice hulls in mass ratio 1:10 be uniformly mixed be made dystopy fermentation special bacteria agent, by 3m31kg is added in padding
Leavening is added in dystopy fermentation special bacteria agent, uniformly sheds on padding；
Step 9, control filtrate adjust padding moisture 55%, using turning machine, material are sufficiently mixed；
Step 10 starts spray filtrate daily, carries out turning over throwing, padding height after spraying 4h when temperature of charge is stablized at 55 DEG C
When reducing 13cm, filter cake need to be used to be supplemented as padding；
All paddings after 1 year, are cleared out direct returning to farmland from fermentation house or carry out deep processing as organic fertilizer raw material by step 11,
Filter cake or addition part rice husk, sawdust is used to repeat the above process without adding fermenting agent as padding, continue to run micro- life
Object dystopy fermentation system handles livestock and poultry feces.
Embodiment 3
A kind of recycling processing method of high-moisture percentage livestock and poultry feces, includes the following steps：
The livestock and poultry feces that moisture content is 90% or so are transported to scratch pool by poultry house with totally-enclosed fecal suction truck, passed through by step 1
Automatical feeding system enters material in vertical or horizontal fermentor；
Step 2, decomposed specific enzyme bacterium complexing agent are activated, and decomposed specific enzyme bacterium complexing agent uses first 2 hours, with warm water pair
Decomposed specific enzyme bacterium complexing agent is activated, and in mass ratio 1:15 are made suspension, and suspension is sufficiently stirred, wherein warm water temperature
Degree is 37 DEG C；
Decomposed specific enzyme bacterium complexing agent after gained activation in step 2 is added in vertical or horizontal fermentor, opens by step 3
It opens exposure oxygen system automatically and stirring system the material in fermentor is carried out to expose oxygen and stirring, while being added using oil burning boiler or electricity
Heat reaches 40 DEG C to material heat temperature raising, to temperature, the aerobic dynamic fermentation 25h of medium temperature constant temperature；
Resulting material in step 3 is made material enter conditioning tank by step 4 by auto discharging system；
Step 5 adds conditioner, 5 ‰ conditioner mother liquor is configured to water, then be added in conditioning tank in 10% ratio,
It stirs evenly, adds conditioner in the ratio of material conditioner volume ratio 5/10000ths；
Livestock and poultry feces after adjusting are separated by solid-liquid separation in for 24 hours with plate and frame filter press, are produced by step 6 by step 5 resulting material
The filter cake of raw moisture content 65% or so and filtrate, wherein it is spare that filter cake is temporarily stored into sunlight canopy, subsequent as dystopy fermentation system
The supplement padding of system uses；Filtrate is temporarily stored into sump, later use dystopy fermentation system zero discharge treatment；
Filter cake pad is put in the fermentation tank in dystopy fermentation house, is made by the mixture of rice husk and sawdust by step 7, filter cake processing
For initial padding, pad sets the turning machine and spray thrower opened in dystopy fermentation house with a thickness of 1.4m, and turning machine cooperates line-shifting machine edge
Track above fermentation tank is moved to from a fermentation tank to carry out filter cake in another fermentation tank to turn over polishing working, and spray thrower is reciprocal
Waste in spray pond is sprayed on the padding in fermentation tank by movement；
Step 8, filtrate processing, by rice husk and sawdust in mass ratio 2:1 mixture does initial padding, by streptomyces microflavus with
Maize flour or wheat bran or powdered rice hulls in mass ratio 1:15 be uniformly mixed be made dystopy fermentation special bacteria agent, by 4m31kg is added in padding
Leavening is added in dystopy fermentation special bacteria agent, uniformly sheds on padding；
Step 9, control filtrate adjust padding moisture 60%, using turning machine, material are sufficiently mixed；
Step 10 starts spray filtrate daily, carries out turning over throwing, padding height after spraying 5h when temperature of charge is stablized at 60 DEG C
When reducing 15cm, filter cake need to be used to be supplemented as padding；
All paddings after 1 year, are cleared out direct returning to farmland from fermentation house or carry out deep processing as organic fertilizer raw material by step 11,
Filter cake or addition part rice husk, sawdust is used to repeat the above process without adding fermenting agent as padding, continue to run micro- life
Object dystopy fermentation system handles livestock and poultry feces.
It should be noted that decomposed specific enzyme bacterium complexing agent is thermolysin and cellulose-decomposing bacterium in step 2
And the ratio such as bacillus mixes.
It is obvious to a person skilled in the art that invention is not limited to the details of the above exemplary embodiments, Er Qie
In the case where without departing substantially from spirit or essential attributes of the invention, the present invention can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the present invention is by appended power
Benefit requires rather than above description limits, it is intended that all by what is fallen within the meaning and scope of the equivalent elements of the claims
Variation is included within the present invention.
In addition, it should be understood that although this specification is described in terms of embodiments, but not each embodiment is only wrapped
Containing an independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should
It considers the specification as a whole, the technical solutions in the various embodiments may also be suitably combined, forms those skilled in the art
The other embodiments being understood that.
Claims (9)
1. a kind of recycling processing method of high-moisture percentage livestock and poultry feces, which is characterized in that include the following steps：
Livestock and poultry feces are transported to scratch pool by poultry house with totally-enclosed fecal suction truck, make object by automatical feeding system by step 1
Material enters in vertical or horizontal fermentor；
Step 2, decomposed specific enzyme bacterium complexing agent are activated, and decomposed specific enzyme bacterium complexing agent is before use, with warm water to decomposed special
It is activated with enzyme bacterium complexing agent, suspension is made, suspension is sufficiently stirred；
Decomposed specific enzyme bacterium complexing agent after gained activation in step 2 is added in vertical or horizontal fermentor, opens by step 3
Automatic oxygen system and the stirring system of exposing is opened the material in fermentor is carried out to expose oxygen and stirring, the aerobic dynamic fermentation of medium temperature constant temperature；
Resulting material in step 3 is made material enter conditioning tank by step 4 by auto discharging system；
Step 5 adds conditioner, 1 ‰~5 ‰ conditioner mother liquor is configured to water, then be added to adjusting in 10% ratio
Chi Zhong is stirred evenly, and adds conditioner in the ratio of material conditioner volume ratio a ten thousandth to 5/10000ths；
Livestock and poultry feces after adjusting are separated by solid-liquid separation by step 6 by step 5 resulting material with plate and frame filter press；
Filter cake pad is put in the fermentation tank in dystopy fermentation house, opens the turning in dystopy fermentation house by step 7, filter cake processing
Machine and spray thrower；
Step 8, filtrate processing, does initial padding for the mixture of rice husk and sawdust, and streptomyces microflavus and maize flour are pressed quality
Than 1:5~1：15 be uniformly mixed be made dystopy fermentation special bacteria agent, uniformly shed on padding；
Step 9, control filtrate adjust padding moisture 50%~60%, using turning machine, material are sufficiently mixed；
Step 10 is stablized to temperature of charge, starts spray filtrate daily, carries out turning over throwings after spray, when the reduction of padding height, need to make
It is supplemented with filter cake as padding；
All paddings after 1 year, are cleared out direct returning to farmland from fermentation house or carry out deep processing as organic fertilizer raw material by step 11,
It uses filter cake or addition part rice husk, sawdust as padding, repeats the above process.
2. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 1, which is characterized in that described
In step 2, warm water temperature is controlled at 18-37 DEG C.
3. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 1, which is characterized in that described
In step 3, while carrying out exposing oxygen and stirring to the material in fermentor, heat temperature raising is carried out to material, temperature need to rise to
Until 30-40 DEG C.
4. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 3, which is characterized in that described
Heating heats the material in fermentor using oil burning boiler.
5. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 3, which is characterized in that described
Heating heats the material in fermentor using electrically heated mode.
6. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 1, which is characterized in that described
In step 6, the livestock and poultry feces after separation are divided into filter cake and filtrate.
7. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 6, which is characterized in that described
It is spare that filter cake is temporarily stored into sunlight canopy.
8. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 6, which is characterized in that described
Filtrate is temporarily stored into sump.
9. a kind of recycling processing method of high-moisture percentage livestock and poultry feces according to claim 1, which is characterized in that described
In step 8, maize flour can be replaced wheat bran or powdered rice hulls.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110950504A (en) * | 2019-12-27 | 2020-04-03 | 李占川 | Farm excrement treatment system and corresponding treatment method |
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