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System and method for resource utilization of excrement in livestock and poultry farms and ammonia-controlled and carbon-reduced full-chain emission reduction

A resource-based, full-chain technology that is applied in the fields of resource utilization of livestock and poultry manure, air pollution prevention and carbon peak carbon neutralization methods, and can solve problems such as ammonia volatilization loss, low nitrogen use efficiency, and poor nitrogen fixation capacity , to achieve the effect of reducing ammonia emission level, improving nitrogen utilization efficiency, and improving utilization efficiency

Pending Publication Date: 2021-08-27
SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to: overcome the deficiencies of the prior art, aiming at the process of ① the biogas slurry storage and returning to the field in the conventional anaerobic fermentation treatment process used in the treatment of urine and sewage existing in the resource utilization process of large-scale livestock and poultry farms Poor nitrogen fixation capacity, low nitrogen use efficiency, serious ammonia volatilization loss, etc., ②The pollution discharge of ammonia and other odorous substances during the breeding process of livestock and poultry breeding sheds, ③The pollution discharge of ammonia and other odorous substances in the process of solid manure composting, ④ Waste gas and greenhouse gas emissions generated in the process of biogas power generation utilization, etc., provide a resource utilization of livestock and poultry manure that can improve the efficiency of resource utilization of livestock and poultry manure, improve the level of ambient air quality, and reduce carbon emissions. Ammonia Control and Carbon Reduction Full Chain Emission Reduction System and Method

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  • System and method for resource utilization of excrement in livestock and poultry farms and ammonia-controlled and carbon-reduced full-chain emission reduction
  • System and method for resource utilization of excrement in livestock and poultry farms and ammonia-controlled and carbon-reduced full-chain emission reduction
  • System and method for resource utilization of excrement in livestock and poultry farms and ammonia-controlled and carbon-reduced full-chain emission reduction

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Embodiment 1

[0054] Such as figure 1 As shown, the present invention is a full-chain emission reduction system for resource utilization of livestock and poultry farm manure and ammonia control and carbon reduction, which mainly includes: livestock and poultry breeding sheds, anaerobic digestion tanks, composting units, power generation units, ammonia nitrogen nitrification biological filtration Pond device, odorous biological filter device, waste gas treatment device, hot water pool, greenhouse and supporting farmland, etc.; livestock and poultry breeding sheds are connected to the anaerobic digester, and the biogas slurry outlet of the anaerobic digester is connected to the nitrification trickling filter tower The water inlet connection of the water tank; the outlet of the water storage area of ​​the nitrification trickling filter tower, one road is connected with the livestock and poultry breeding shed, the other road is connected with the water inlet of the potted drip irrigation system ...

Embodiment 2

[0060] refer to figure 1 , a method for resource utilization of manure from livestock and poultry farms of the present invention and a full-chain emission reduction method for ammonia control and carbon reduction, comprising the following steps:

[0061] (1) After solid-liquid separation of the feces produced by livestock and poultry sheds, urine sewage and solid feces are obtained;

[0062] (2) Pass the urine sewage in step (1) into the anaerobic digestion tank (anaerobic fermentation tank), the carbon-nitrogen ratio in the anaerobic fermentation tank is controlled at 20:1~30:1, and the temperature is controlled at 35~40°C , the pH is controlled at 6.8-7.5, the fermentation period is controlled at 20 days, and biogas slurry, biogas and biogas residue are obtained through anaerobic fermentation;

[0063] (3) the biogas slurry obtained in the step (2) is led to the ammonia nitrogen nitrification biofilter device (see figure 2 ) for treatment: the device uses the aerobic micr...

Embodiment 3

[0080] refer to figure 1 , a method for resource utilization of manure from livestock and poultry farms of the present invention and a full-chain emission reduction method for ammonia control and carbon reduction, comprising the following steps:

[0081] (1) After solid-liquid separation of the feces produced by livestock and poultry sheds, urine sewage and solid feces are obtained;

[0082] (2) Pass the urine sewage in step (1) into the anaerobic digestion tank (anaerobic fermentation tank), the carbon-nitrogen ratio in the anaerobic fermentation tank is controlled at 20:1~30:1, and the temperature is controlled at 35~40°C , the pH is controlled at 6.8-7.5, the fermentation cycle is controlled at 30 days, and biogas slurry, biogas and biogas residue are obtained through anaerobic fermentation;

[0083] (3) the biogas slurry obtained in the step (2) is led to the ammonia nitrogen nitrification biofilter device (see figure 2 ) for treatment: the device uses the aerobic micro...

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Abstract

The invention relates to a system and method for resource utilization of excrement in livestock and poultry farms and ammonia-controlled and carbon-reduced full-chain emission reduction. The system comprises a livestock and poultry shed, an anaerobic digester, a composting unit, a power generation unit, an ammonia-nitrogen nitration biological filter device, a stink biological filter device, a waste gas treatment device and a greenhouse. According to the method, biogas slurry is treated by an ammonia-nitrogen nitration biofilter to obtain nitration liquid, and the nitration liquid is conveyed to the greenhouse and farmland for utilization or is used as shed flushing water to flush the livestock and poultry shed for ammonia-controlled recycling; marsh gas is used for providing power through the power generation unit, and generated CO2 waste gas is treated and then is introduced into the greenhouse to serve as a carbon source; and solid manure and biogas residues are used for producing organic fertilizer through the composting unit, and generated stink is treated by a stink biological filter. According to the method, the utilization efficiency of nitrogen in the biogas slurry is remarkably improved, ammonia and stink produced during biogas slurry returning, breeding in an animal house and manure composting are greatly reduced, the yield of crops is increased by reducing carbon and increasing sink, and the method has important significance on air pollution prevention and control, green agriculture development and implementation of a carbon neutralization strategy.

Description

technical field [0001] The invention belongs to the technical fields of resource utilization of livestock and poultry manure, prevention and control of air pollution, and carbon neutralization of carbon peaks, and specifically relates to a full-chain emission reduction system and method for resource utilization of livestock and poultry manure and ammonia control and carbon reduction. Background technique [0002] In recent years, the scale and intensification of livestock and poultry breeding in my country has been continuously improved, but the level of livestock and poultry manure treatment and utilization is relatively lagging behind. According to statistics from the Ministry of Agriculture and Rural Affairs, the annual production of livestock and poultry manure in my country is about 3.8 billion tons, while the comprehensive utilization rate and harmless rate are less than 60% and 50%. One of the environmental issues. The Ministry of Agriculture issued the "Action Plan f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F3/30C02F11/02C02F11/04C02F101/16C02F103/20
CPCC02F3/30C02F11/02C02F11/04C02F2101/16C02F2103/20
Inventor 徐昶王振旗倪远之沈根祥张心良苗文亮高宗源陈小华钱晓雍王晨朱雅婷
Owner SHANGHAI ACADEMY OF ENVIRONMENTAL SCIENCES