A method for rapidly reducing antibiotics and resistance genes in organic solid waste

Abstract

The invention discloses a method for rapidly reducing antibiotics and resistance genes in organic solid waste, belonging to the field of organic solid waste treatment. The present invention utilizes aerobic fermentation bacteria that can withstand at least 80°C, and controls the temperature of the heap to not be lower than 80°C to ferment for at least 5 to 7 days to carry out ultra-high temperature aerobic fermentation of organic solid waste, which can obtain fast and stable reduction of organic waste. Effects of antibiotics and their resistance genes in solid waste. The ultra-high temperature aerobic fermentation can not only rapidly degrade antibiotics and ARGs, but also change the structure of the entire microbial community in the heap, kill 90% of microorganisms carrying ARGs (mainly Proteobacteria and Bacteroidetes), and reduce the risk of gene transfer of ARGs , controlling its diffusion from the source, ensuring that ARGs will not rebound. It not only realizes the treatment of organic solid waste, but also can efficiently remove antibiotic residues and resistance gene pollution. The method of the invention does not need external heating, and only relies on the metabolic capacity of thermophilic microorganisms to achieve high fermentation temperature, and has low energy consumption and environmental friendliness.

Description

technical field [0001] The invention belongs to the field of organic solid waste treatment, in particular to a method for rapidly reducing antibiotics and resistance genes in sludge. Background technique [0002] my country is the largest producer and consumer of antibiotics in the world. In 2013, the total amount of antibiotics used in my country reached 162,000 tons, half of which was used in livestock and poultry breeding. In order to prevent the infection of livestock and poultry, farmers often feed large doses of antibiotics, but most of these antibiotics are not absorbed, and about 30-90% of them are excreted with feces and urine in the form of original drugs or metabolites, resulting in livestock and poultry feces Antibiotic residues exceeded the standard. The irrational use and long-term abuse of antibiotics have resulted in excessive antibiotic residues in the environment, resulting in increased selection pressure for drug-resistant microorganisms in the environmen...

AI Technical Summary

Problems solved by technology

Xie et al. reported that after long-term application of organic fertilizers made from traditional sludge composting, the content of ARGs in farmland soil increased significantly, and there was a risk of expanding pollution and spreading

So far, there is still a lack of efficient and economical treatment technology, which can not only solve the pollution of ARGs and antibiotics in organic solid waste, but also make the waste resource utilization technology

[0007] Therefore, it is urgent to develop an efficient and economical technical means: to solve the potential health risks caused by the pollution and spread of ARGs and antibiotics in organic solid waste, and to recycle organic solid waste

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