Characteristics and Risk Assessment of Antibiotic in Sewage from Typical Large-scale Hoggery in Sichuan Province
This paper focused on the sewage of hoggery.The concentrations of 9 antibiotics in the sewage containing tetracycline,sulfonamides and quinolones in 28 typical large-scale hoggeries were detected in Sichuan Province.Nine antibiotics were tetracycline,oxytetracycline,chlortetracycline,sulfamethazine,sulfamethoxazole,sulfamethoxazole,norfloxacin,ciprofloxacin,and enrofloxacin.The detect results showed that antibiotic residues were detected in 28 groups of livestock and poultry breeding wastewater samples,among them,tetracycline have the highest concentration,and the detected concentration was 0.476～214.274μg/L,with an average concentration of 26.901μg/L.The concentration of antibiotics in the inlet and outlet of different sewage treatment processes indicated that aerobic or advanced oxidation processes could degrade antibiotics effectively.The average degradation rates of tetracycline,sulfonamides and quinolones were achieved 46.79%,8.71%,and 58.56%.However,the anaerobic process has no degradation effect on antibiotics,and even negative removal occurred.The degradation rate was-41.31%,-378.72%,-13.42%.The results of the risk assessment showed that all antibiotics were at low risk at 16 sites,single intermediate-risk at 9 sites,multiple intermediate-risk antibiotics at 2 sites,and a high risk of sulfamethoxamine at 1 site.In short,large-scale hoggery in Sichuan Province has a high-level manure treatment process,but the misuse of antibiotics persists,and the environmental risks of farmland utilization to soil cannot be ignored.
large-scale hoggerysewagefarmland utilizationantibioticecological risk of soil
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