A method for aerobic composting of livestock and poultry manure

A technology for livestock and poultry manure and aerobic composting, which is applied in the fields of environmental protection and comprehensive utilization of resources, can solve the problems of reducing the content of available heavy metals, the comprehensive utilization rate of less than 60%, nitrogen loss, etc. The effect of improving aerobic composting efficiency and controlling nitrogen loss

Active Publication Date: 2022-06-24
GUANGDONG UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, with the development and promotion of the industrialization and intensification of my country's livestock and poultry breeding industry, the annual output of livestock and poultry manure is huge. According to the data of the Ministry of Agriculture, the current annual production of livestock and poultry manure in my country is about 3.8 billion tons, but the comprehensive utilization rate Less than 60%
[0005] At the same time, the loss of nitrogen in fertilizer is the main reason for the decline of fertilizer fertility. During the process of aerobic composting of poultry manure, nitrogen will also be lost in various ways, such as NH 3 Volatile and N x O emission, reducing fertilizer efficiency of composting products
Patents CN201810320047.4, CN201710077317.9, CN201310734659.5 all disclose methods for degrading antibiotics in poultry manure, and CN201811633872.6 discloses a heavy metal passivation and nitrogen conservation method; however, aerobic composting is currently used to simultaneously remove antibiotics , resistance genes and reducing the content of effective heavy metals and controlling nitrogen loss have not been reported

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Mix Bacillus licheniformis, Phanerochaete chrysosporium, and Aspergillus niger in a volume ratio of 1:5:5 to prepare an inoculant. After drying the garden waste, cut it into 1 cm, and add it to livestock and poultry manure to adjust C. / N to 28, adjust the moisture content to 55%, add 5% molasses (as a percentage of dry matter mass) to the adjusted livestock and poultry manure, and inoculate the inoculant at 2% (v / w) to the adjusted Aerobic composting is carried out in livestock manure.

[0029] When the temperature is higher than 70 ℃, the ventilation is 1h, and the ventilation volume is 0.02 m 3 O 2 / (kg organic matter*h), the heap was turned every 6 days, and the composting time was 30 days. The results showed that the method of Example 1 had a degradation rate of 68% for enrofloxacin in livestock and poultry manure, and the degradation rate of ciprofloxacin for ciprofloxacin was 68%. The degradation rate was 69%, the degradation rate of tetracycline was 75%, the t...

Embodiment 2

[0031] Mix Bacillus licheniformis, Phanerochaete chrysosporium, and Aspergillus niger in a volume ratio of 1:4:6 to prepare an inoculant. After drying the garden waste, cut it into 2 cm, and add it to livestock and poultry manure to adjust C. / N to 30, adjust the moisture content to 60%, add 7% molasses (as a proportion of dry matter mass) to the adjusted livestock and poultry manure, and inoculate the inoculum at 3% (v / w). Aerobic composting is carried out in livestock manure.

[0032] When the temperature is higher than 70℃, the ventilation is 0.5h, and the ventilation volume is 0.04m 3 O 2 / (kg organic matter*h), the heap was turned every 6 days, and the composting time was 25d. The results showed that the method of Example 2 had a degradation rate of 69% for enrofloxacin in livestock and poultry manure, and the degradation rate of ciprofloxacin for ciprofloxacin was 69%. The degradation rate was 70%, the degradation rate to tetracycline was 78%, the total abundance of re...

Embodiment 3

[0034] Mix Bacillus licheniformis, Phanerochaete chrysosporium, and Aspergillus niger in a volume ratio of 1:4:6 to prepare an inoculant. After drying the garden waste, cut it into 1cm, and add it to livestock and poultry manure to adjust C. / N to 30, adjust the moisture content to 60%, add 6% molasses (as a percentage of dry matter mass) to the adjusted livestock and poultry manure, and inoculate the inoculant at 2% (v / w) until the adjusted Aerobic composting is carried out in livestock manure.

[0035] When the temperature is higher than 70℃, the ventilation is 0.5h, and the ventilation volume is 0.04m 3 O 2 / (kg organic matter*h), the heap was turned every 7 days, and the composting time was 27 days. The results showed that the method of Example 3 had a degradation rate of 69% for enrofloxacin in livestock and poultry manure. The degradation rate was 71%, the degradation rate to tetracycline was 80%, the total abundance of resistance genes (ARGs) decreased to 41%, the pas...

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PUM

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Abstract

The invention discloses a high-efficiency aerobic composting bacterial agent for livestock and poultry manure and a method for aerobic composting thereof. The bacterial agent is composed of various strains in the following volume ratios: Bacillus licheniformis: Phanerochaete chrysosporium: Aspergillus niger Mold = 1:4~5:5~6. The aerobic composting steps are as follows: S1. Add agricultural and forestry wastes to the livestock and poultry manure, adjust the C / N of the livestock and poultry manure to 28-30, and the moisture content to 55%-60%; S2. Add the adjusted poultry waste to S1 Add sugar source to livestock manure, then add the above-mentioned bacterial agent, mix well and perform aerobic composting. After aerobic composting, the antibiotics in livestock and poultry manure degrade significantly, and at the same time greatly reduce the content of available heavy metals and resistance genes in livestock and poultry manure, and effectively control the loss of nitrogen, which has a great application prospect.

Description

technical field [0001] The invention relates to the fields of environmental protection and comprehensive utilization of resources, and more particularly, to a high-efficiency aerobic composting bacterial agent for livestock and poultry manure and a method for aerobic composting thereof. Background technique [0002] In recent years, with the development and promotion of the industrialization and intensification of my country's livestock and poultry breeding industry, the annual output of livestock and poultry manure is huge. According to the data of the Ministry of Agriculture, the current annual output of livestock and poultry manure in my country is about 3.8 billion tons, but the comprehensive utilization rate less than 60%. Resource utilization is the main way to solve the pollution of livestock and poultry manure. The resource utilization methods of livestock and poultry manure mainly include fertilizer, feed and energy. However, since there are many potential safety ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C12N1/20C12N1/14C05F17/20C05F17/50C05F17/80C05F15/00C12R1/10C12R1/645C12R1/685
CPCC12N1/20C12N1/14C05F3/00C05F17/80C05F17/20Y02W30/40
Inventor 郑莉许燕滨宁寻安谢光炎刘艳婷
Owner GUANGDONG UNIV OF TECH
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