微波预处理强化厌氧消化污水污泥过程中抗生素耐药菌和基因的命运。
Fate of antibiotic resistance bacteria and genes during enhanced anaerobic digestion of sewage sludge by microwave pretreatment.
机构信息
State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China.
School of Environment and Natural Resources, Renmin University of China, Beijing 100872, China.
出版信息
Bioresour Technol. 2016 Oct;217:37-43. doi: 10.1016/j.biortech.2016.02.130. Epub 2016 Mar 3.
The fate of antibiotic resistant bacteria (ARB) and antibiotic resistance genes (ARGs) were investigated during the sludge anaerobic digestion (AD) with microwave-acid (MW-H), microwave (MW) and microwave-H2O2-alkaline (MW-H2O2) pretreatments. Results showed that combined MW pretreatment especially for the MW-H pretreatment could efficiently reduce the ARB concentration, and most ARG concentrations tended to attenuate during the pretreatment. The subsequent AD showed evident removal of the ARB, but most ARGs were enriched after AD. Only the concentration of tetX kept continuous declination during the whole sludge treatment. The total ARGs concentration showed significant correlation with 16S rRNA during the pretreatment and AD. Compared with unpretreated sludge, the AD of MW and MW-H2O2 pretreated sludge presented slightly better ARB and ARGs reduction efficiency.
研究了微波酸（MW-H）、微波（MW）和微波-H2O2-堿（MW-H2O2）预处理条件下污泥厌氧消化（AD）过程中抗生素耐药细菌（ARB）和抗生素耐药基因（ARGs）的命运。结果表明，MW 预处理，特别是 MW-H 预处理可以有效降低 ARB 浓度，且大多数 ARG 浓度在预处理过程中呈衰减趋势。随后的 AD 表明 ARB 有明显的去除，但 AD 后大多数 ARGs 被富集。只有 tetX 的浓度在整个污泥处理过程中持续下降。预处理和 AD 过程中，总 ARGs 浓度与 16S rRNA 呈显著相关性。与未预处理的污泥相比，MW 和 MW-H2O2 预处理污泥的 AD 对 ARB 和 ARGs 的去除效率略好。
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