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Method for anaerobic fermentation of livestock and poultry manure

A technology of livestock manure and anaerobic fermentation, applied in chemical instruments and methods, animal husbandry wastewater treatment, biological sludge treatment, etc., can solve problems such as high energy consumption and low efficiency, reduce operating costs, improve efficiency, promote Effects of anaerobic digestion of livestock manure for methane production potential

Pending Publication Date: 2022-08-02
CHINESE RES ACAD OF ENVIRONMENTAL SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the above-mentioned methods increase the steps of substrate treatment, and at the same time have the disadvantages of high energy consumption and low efficiency

Method used

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  • Method for anaerobic fermentation of livestock and poultry manure
  • Method for anaerobic fermentation of livestock and poultry manure
  • Method for anaerobic fermentation of livestock and poultry manure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～6

[0046] S1. Before inoculation of anaerobic sludge, anaerobic culture was carried out with livestock and poultry manure for 14 days, and 43 g of cow manure was mixed with 120 g of anaerobic sludge to obtain fermentation raw materials. Nitrogen blowing and dragging for 2 minutes to maintain a strict anaerobic environment in the reaction flask;

[0047] S2. Place the anaerobic reaction flask in a water bath for anaerobic fermentation, shake it manually 3 times in the morning and noon every day to make the fermentation liquid evenly mixed, and set the reaction temperature to 37°C during the entire experiment, and recover methane at the same time.

Embodiment 2～4

[0049]S1. Before inoculation of anaerobic sludge, anaerobic culture was carried out with livestock and poultry manure for 14 days, and 43 g of cow manure was mixed with 120 g of anaerobic sludge to obtain fermentation raw materials. Nitrogen was blown for 2 minutes to maintain a strict anaerobic environment in the reaction flask;

[0050] S2. Apply a magnetic field of 5mT, 20mT, and 50mT outside the anaerobic bottle respectively;

[0051] S3. Place the anaerobic reaction flask in a water bath for anaerobic fermentation, shake it manually 3 times in the morning and noon every day to make the fermentation liquid mix evenly, and set the reaction temperature to 37°C during the entire experiment, and recover methane at the same time.

Embodiment 5

[0053] S1, 43g of cow dung is mixed with 120g of anaerobic sludge to obtain fermentation raw materials, and the remaining part is added to 150mL with water, and is loaded into an anaerobic reaction flask; with nitrogen blowing for 2min to maintain a strict anaerobic environment in the reaction flask;

[0054] S2. Add zero iron 0.5g / L to the anaerobic reaction bottle;

[0055] S3. Place the anaerobic reaction flask in a water bath for anaerobic fermentation, shake it manually 3 times in the morning and noon every day to make the fermentation liquid mix evenly, and set the reaction temperature to 37°C during the entire experiment, and recover methane at the same time.

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Abstract

The invention relates to the technical field of environmental protection, in particular to a method for anaerobic fermentation of livestock and poultry manure. The method at least comprises the following steps: mixing livestock and poultry manure with anaerobic sludge to obtain a fermentation raw material, and filling the fermentation raw material into an anaerobic reactor; adding zero iron into the anaerobic reactor, and applying a magnetic field; and carrying out anaerobic fermentation and recovering methane. The effect of a magnetic field on microorganisms is mainly utilized, so that the methane production efficiency of anaerobic digestion of the livestock and poultry manure is improved. The magnetic field can promote corrosion of zero iron, more electron donors can be provided more quickly, and the anaerobic digestion methane production potential of the livestock and poultry manure is effectively promoted.

Description

technical field [0001] The invention relates to the technical field of environmental protection, in particular to a method for anaerobic fermentation of livestock and poultry manure. Background technique [0002] With the rapid development of agricultural intensive and large-scale farms in China, a large amount of agricultural waste is produced every year. It is estimated that the average annual output of livestock and poultry manure in my country is about 3.8 billion tons, and 40% of it has not been effectively treated and utilized. Livestock and poultry manure contains heavy metals and microbial pathogens, and random stacking may contaminate nearby water sources and soil; or emit foul odors, form greenhouse gases and volatile organic compounds and cause air pollution; it may also attract disease vectors such as mosquitoes. Nearby residents are healthy. [0003] Anaerobic digestion is a technology that can use a variety of wastes to produce renewable energy, which is envi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/04C02F11/00C02F103/20
CPCC02F11/04C02F11/00C02F2103/20Y02P20/59
Inventor 杜彩丽李晓光张列宇黎佳茜赵琛李伟李曹乐李国文
Owner CHINESE RES ACAD OF ENVIRONMENTAL SCI
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