Comparison of ozone and thermal hydrolysis combined with anaerobic digestion for municipal and pharmaceutical waste sludge with tetracycline resistance genes

被引：101
|
作者：
Pei, Jin [1 ]
Yao, Hong [1 ]
Wang, Hui [1 ]
Ren, Jia [1 ]
Yu, Xiaohua [1 ]
机构：
[1] Beijing Jiaotong Univ, Dept Municipal & Environm Engn, Beijing 100044, Peoples R China
来源：
WATER RESEARCH | 2016年 / 99卷
基金：
中国国家自然科学基金;
关键词：
Ozone; Thermal hydrolysis; Anaerobic digestion; Tetracycline resistance genes; Pharmaceutical sludge; Municipal sludge; ACTIVATED-SLUDGE; SEWAGE-SLUDGE; WATER; SOLUBILIZATION; REMOVAL; BIODEGRADABILITY; BACTERIA; DISINTEGRATION; PRETREATMENTS; DISINFECTION;
D O I：
10.1016/j.watres.2016.04.058
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Biosolids from wastewater treatment plant (WWTP) are environmental reservoirs of antibiotic resistance genes, which attract great concerns on their efficient treatments. Anaerobic digestion (AD) is widely used for sewage sludge treatment but its effectiveness is limited due to the slow hydrolysis. Ozone and thermal hydrolysis pre-treatment were employed to improve AD efficiency and reduce antibiotic resistant genes in municipal and pharmaceutical waste sludge (MWS and PWS, respectively) in this study. Sludge solubilization achieved 15.75-25.09% and 14.85-33.92% after ozone and thermal hydrolysis, respectively. Both pre-treatments improved cumulative methane production and the enhancements were greater on PWS than MWS. Five tetracycline-resistant genes (tet(A), tet(G), tet(QJ, tet(W), tet(X)) and one mobile element (intI1) were qPCR to assess pre-treatments. AD of pre-treated sludge reduced more tet genes than raw sludge for both ozonation and thermal hydrolysis in PWS and MWS. Thermal hydrolysis pre-treatment was more efficient than ozone for reduction after AD. Results of this study help support management options for reducing the spread of antibiotic resistance from biosolids. (C) 2016 Published by Elsevier Ltd.
引用
收藏
页码：122 / 128
页数：7
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