文献类型：期刊文献

英文题名：Zero valent iron enhances methane production from primary sludge in anaerobic digestion

作者：Wei, Wei[1];Cai, Zhengqing[2];Fu, Jie[3];Xie, Guo-Jun[4];Li, Ang[4];Zhou, Xu[5];Ni, Bing-Jie[1];Wang, Dongbo[6,7];Wang, Qilin[1,8,9,10]

机构：[1]Univ Queensland, Adv Water Management Ctr, Brisbane, Qld 4072, Australia;[2]East China Univ Sci & Technol, Sch Resource & Environm Engn, Shanghai 200237, Peoples R China;[3]Fudan Univ, Dept Environm Sci & Engn, Shanghai 200438, Peoples R China;[4]Harbin Inst Technol, State Key Lab Urban Water Resource & Environm, Harbin 150090, Heilongjiang, Peoples R China;[5]Harbin Inst Technol Shenzhen, Shenzhen Engn Lab Microalgal Bioenergy, Shenzhen 518055, Peoples R China;[6]Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China;[7]Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China;[8]Griffith Univ, Sch Engn & Built Environm, Brisbane, Qld 4111, Australia;[9]Griffith Univ, Ctr Clean Environm & Energy, Brisbane, Qld 4111, Australia;[10]Griffith Univ, Environm Futures Res Inst, Brisbane, Qld 4111, Australia

年份：2018

卷号：351

起止页码：1159

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20182905558197);WOS:【SCI-EXPANDED(收录号:WOS:000444000000118)】；

基金：The authors acknowledge the Australian Research Council (ARC) for funding support through the Discovery Early Career Researcher Award (DE160100667) and Discovery Project (DP170102812) awarded to Dr. Qilin Wang.

语种：英文

外文关键词：Anaerobic digestion; Zero valent iron; Primary sludge; Methane production; Dewaterability

摘要：This study proposed a novel zero valent iron (ZVI) technology to enhance anaerobic methane production from primary sludge in the anaerobic digester and to improve the dewaterability of digested sludge for the first time. Compared to the control test without ZVI, the anaerobic digester with ZVI at all levels (1, 4 and 20 g/L) played a driving role in anaerobic methane production from primary sludge. The maximal biochemical methane production of 439 +/- 5 L CH4/kg VS was achieved at ZVI of 4 g/L, while only 345 +/- 2 L CH4/kg VS (volatile solids) was produced in the case of no-ZVI dosage, representing a relative increase of 26.9 +/- 0.1%. It was also found that ZVI addition would produce an anaerobically digested sludge with a better dewaterability, as indicated by the decrease of the normalized capillary suction time from 100 to 63 similar to 89 s, respectively. Model based analysis revealed that the enhanced methane production from primary sludge was due to an increase in both hydrolysis rate and biochemical methane potential of primary sludge. Economic analysis demonstrated that ZVI technology was economically favorable.