您好，欢迎访问北京市农林科学院 机构知识库！
北京市农林科学院机构知识库

全部

  • 全部
  • 标题
  • 学者
  • 机构
  • 关键词

Impact of roxarsone on the UASB reactor performance and its degradation

文献类型： 外文期刊

作者： Shui, Mengchuan 1 ; Ji, Feng 2 ; Tang, Rui 1 ; Yuan, Shoujun 1 ; Zhan, Xinmin 3 ; Wang, Wei 1 ; Hu, Zhenhu 1 ;

作者机构： 1.Hefei Univ Technol, Sch Civil Engn, Hefei 230009, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Anim Husb & Vet Med, Beijing 100081, Peoples R China

3.Natl Univ Ireland, Coll Engn & Informat, Galway, Ireland

4.Hefei Univ Technol, Inst Water Treatment & Wastes Reutilizat, Hefei 230009, Peoples R China

关键词： Anaerobic digestion;Anaerobic granular sludge (AGS);Arsenic species;Impact;Roxarsone (ROX);UASB reactor

期刊名称：FRONTIERS OF ENVIRONMENTAL SCIENCE & ENGINEERING （ 影响因子：4.357； 五年影响因子：3.688 ）

ISSN： 2095-2201

年卷期： 2016 年 10 卷 6 期

页码：

收录情况： SCI

摘要： Roxarsone (3-nitro-4-hydroxyphenylarsonic acid, ROX) has been widely used for decades as an organoarsenic feed additive to control intestinal parasites and improve feed efficiency in animal production. However, most of the ROX is excreted into the manure, causing arsenic contamination in wastewater. The arsenic compounds are toxic to microorganisms, but the influence of continuous ROX loading on upflow anaerobic sludge blanket (UASB) reactor is still unknown. In this study, the impact of ROX and its degradation products on the performance of the UASB reactor and the degradation and speciation of ROX in the reactor were investigated. The UASB reactor (hydraulic retention time: 1.75 d) was operated using synthetic wastewater supplemented with ROX for a period of 260 days. With continuous ROX addition at 25.0 mg.L-1, severe inhibition to methanogenic activity occurred after 87 days operation accompanied with an accumulation of volatile fatty acids (VFAs) and a decline in pH. The decrease of added ROX concentration to 13.2 mg.L-1 did not mediate the inhibition. As(III), As (V), MMA(V), DMA(V), HAPA and an unknown arsenic compound were detected in the reactor, and a possible biotransformation pathway of ROX was proposed. Mass balance analysis of arsenic indicated that 60%-70% of the arsenic was discharged into the effluent, and 30%-40% was precipitated in the reactor. The results from this study suggest that we need to pay attention to the stability in the UASB reactors treating organoarsenic-contaminated manure and wastewater, and the effluent and sludge from the reactor to avoid diffusion of arsenic contamination. (C) Higher Education Press and Springer-Verlag Berlin Heidelberg 2016

  • 相关文献

[1]Adsorption characteristics of 4-hydroxy-3-aminophenylarsonic acid (HAPA) onto anaerobic granular sludge. Li, Jun-Chao,Yuan, Shou-Jun,Wang, Wei,Hu, Zhen-Hu,Ji, Feng,Yuan, Shou-Jun,Wang, Wei,Hu, Zhen-Hu. 2016

[2]A bibliometric analysis of anaerobic digestion for methane research during the period 1994-2011. Wang, Li-Hong,Wang, Qunhui,Zhang, Xiao,Cai, Weiwei,Wang, Li-Hong,Sun, Xiaohong. 2013

作者其他论文 更多>>
置顶
购物车
反馈

© 京ICP备09089781号-29 主办单位：北京市农林科学院

学术资源： 中国农业科学院 农业专业知识服务系统 农科联盟资源共建共享平台 中国农业科技文献与信息服务平台 中国农业期刊集成服务平台