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Control method of antibiotic resistance gene of livestock residue

A technology of breeding waste and drug-resistant genes, which is applied in the field of control of antibiotic-resistant genes of breeding waste, can solve problems such as environmental secondary pollution, and achieve the effects of eliminating potential risks, good environmental benefits and economic benefits

Pending Publication Date: 2018-06-12
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This invention is mainly to study the use of sludge biochar, and there is no mention of whether there are resistance gene residues in the biochar. It may lead to Secondary pollution of the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1: Control of Antibiotic Resistance Genes in Farming Wastes

[0025] Regulate moisture content: firstly, the relative abundance of antibiotics (macrolides and sulfonamides) resistance genes is 3.4×10 -1 About (quantitatively determined by PCR) of livestock and poultry manure, after mixing with biomass waste (wood chips, or bamboo chips, or rice husk) according to the weight ratio of livestock and poultry manure to biomass waste of 1.0:1.5, its moisture content Reduced to 30%.

[0026] Pyrolysis: The livestock and poultry manure mixture after water adjustment is continuously sent into the external thermal pyrolysis furnace by means of screw conveying, and is subjected to pyrolysis treatment in an oxygen-free or oxygen-deficient atmosphere to obtain solid substances. The pyrolysis temperature is 600 ℃, the pyrolysis time is 90min.

[0027] Cooling: cooling the above solid matter in an oxygen-deficient atmosphere to obtain biochar. No antibiotic resistance gene ...

Embodiment 2

[0028] Example 2: Control of Antibiotic Resistance Genes in Aquaculture Wastes

[0029] Regulate the water content: at first will be taken from the livestock and poultry farm, the water content is 50%, the relative abundance of antibiotics (polypeptides, tetracyclines and aminoglycosides) resistance genes is 3.0×10 -3 About (quantitatively determined by PCR) of livestock and poultry manure, mixed with biomass waste (sawdust or rice husk) according to the weight ratio of livestock and poultry manure to biomass waste of 1.0:0.5, and then reduce its moisture content to 20% .

[0030] Pyrolysis: The livestock and poultry manure mixture after adjusting the moisture is continuously sent into the external thermal pyrolysis furnace by means of screw conveying, and is subjected to pyrolysis treatment in an oxygen-free or oxygen-deficient atmosphere to obtain solid substances. The pyrolysis temperature is 700°C, pyrolysis time is 60min.

[0031] Cooling: cooling the above solid matter...

Embodiment 3

[0032] Example 3: Control of antibiotic resistance genes in farming waste

[0033] Regulate water content: at first will be taken from livestock and poultry farm, water content is 90%, antibiotic (quinolones, polypeptides and aminoglycosides) resistance gene abundance is at 1.5 * 10 -5About (quantitatively determined by PCR) of livestock and poultry manure, mixed with biomass waste (wood chips, or bamboo chips, or rice husk, or rice bran) according to the weight ratio of livestock and poultry manure to biomass waste of 1.0:1.25 , and its moisture content is reduced to 35%.

[0034] Pyrolysis: The livestock and poultry manure mixture after moisture adjustment is continuously sent into the external heating pyrolysis furnace by means of screw conveying, and is subjected to pyrolysis treatment in an oxygen-free or oxygen-deficient atmosphere to obtain solid substances. The pyrolysis temperature is 800°C, pyrolysis time is 30min.

[0035] Cooling: cooling the above solid matter i...

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Abstract

The invention discloses a control method of an antibiotic resistance gene of livestock residue, which includes steps of mixing livestock residue containing the antibiotic resistance gene with biomasswaste to reduce moisture content to be less than 40%; continuously delivering livestock residue to an external heating type pyrolyzing furnace through a spiral conveying method, and performing pyrolyzing treatment in the atmosphere of oxygen-free or oxygen deficiency; completely decomposing antibiotic resistance gene microorganisms in excrement to obtain a solid matter; cooling the solid matter without oxidization in the atomosphere of oxygen deficiency to obtain charcoal. In virtue of high temperature process of the pyrolytic process, the antibiotic resistance gene microorganisms in the livestock residue can be decomposed on a molecular level, thus the potential risk of the antibiotic resistance gene is completely and safely eliminated; meanwhile, massive combustible gaseous matters generated during the pyrolyzing process can be circularly burned to be pyrolyzing energy source; the antibiotic resistance gene has the advantages of clean combustion and energy-saving emission reduction,the acquired charcoal has good physicochemical property and wide application.

Description

technical field [0001] The invention relates to the field of harmless treatment of solid waste in the farming industry, in particular to a method for controlling antibiotic resistance genes of the farming waste. Background technique [0002] my country is a big country in the production and use of antibiotics, and the important application field is the livestock and poultry breeding industry. According to literature statistics, among the 162,000 tons of antibiotics used in my country in 2013, 52% were used for animals and 48% for humans. Among the antibiotics used to promote growth and treat diseases in animals, only a small part of the antibiotics are used by animals, and most of the antibiotics and the resistance genes induced in animals are directly excreted with the urine and feces of animals in vitro. If these untreated livestock and poultry manures are directly used as agricultural fertilizers, they will put considerable pressure on the microorganisms in the soil env...

Claims

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Application Information

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IPC IPC(8): C10B53/02C10B53/00C10B57/10B01J20/20B01J20/30
CPCB01J20/20C10B53/00C10B53/02C10B57/10Y02E50/10
Inventor 汪印朱永官李春星周雪乔敏
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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