Start-up of thermophilic anaerobic digestion and reduction of tetracycline resistance genes

摘要：

　　The purpose of this study was to start up the thermophilic anaerobic digestion from a mesophilic digester and compare the removal performance of tetracycline resistance genes in sewage sludge by mesophilic and thermophilic digestion.Stable thennophilic anaerobic digestion was achieved within 20 days from a mesophilic digester treating sewage sludge by adopting the one-step startup strategy.After the increase of temperature,thermophilic methanogenic community was established within 11 days,which was characterized by the fast colonization ofMethanosarcina thermophila and two hydrogenotrophic methanogens (Methanothermobacter spp.and Methanoculleus spp.).As for the control of tetracycline resistance genes,compared to mesophilic digestion,thermophilic digestion showed better capacities in the reduction of tet(A),tet(C),tet(G),tet(L),tet(O),tet(M)and tet(X)genes.Therefore,thennophilic anaerobic digestion is a more reliable technology than the mesophilic one for eliminating tetracycline resistance genes in sewage sludge.

关键词： One-step start-up thermophilic anaerobic digestion reduction tetracycline resistance gene

作者: Z.Tian Y.Zhang M.Yang

作者单位: State Key Laboratory of Environmental Aquatic Chemistry, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, P.O.Box 2871, Beijing 100085, China

会议类型: 国内会议

会议名称: 2017全国城市污泥污染防治与资源(能源)化循环利用学术研讨会

会议地点: 重庆

会议语种:英文

页码: 31-35

在线出版日期: 2017-05-01（万方平台首次上网日期，不代表论文的发表时间）