文献类型：期刊文献

英文题名：Enhanced anaerobic digestion of ammonia-rich swine manure by zero-valent iron: With special focus on the enhancement effect on hydrogenotrophic methanogenesis activity

作者：Yang, Yuan[1];Yang, Fei[2];Huang, Weiwei[1,2];Huang, Wenli[3];Li, Fei[1];Lei, Zhongfang[4];Zhang, Zhenya[4]

机构：[1]East China Univ Sci & Technol, Minist Educ, Key Lab Coal Gasificat & Energy Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Hainan Univ, Inst Trop Agr & Forestry, Coll Resources & Environm, Renmin Rd, Haikou 570228, Hainan, Peoples R China;[3]Nankai Univ, Coll Environm Sci & Engn, MOE Key Lab Pollut Proc & Environm Criteria, 94 Weijin Rd, Tianjin 300071, Peoples R China;[4]Univ Tsukuba, Grad Sch Life & Environm Sci, 1-1-1 Tennodai, Tsukuba, Ibaraki 3058572, Japan

年份：2018

卷号：270

起止页码：172

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000447384200021)】；

基金：This work is financially supported by National Natural Science Foundation of China (51708222), China Postdoctoral Science Foundation (2017M611475) and the Fundamental Research Funds for the Central Universities (222201714037).

语种：英文

外文关键词：Ammonia inhibition; Hydrogenotrophic methanogenesis; Zero-valent iron powder; Anaerobic digestion; Swine manure

摘要：Zero-valent iron (ZVI) supplementation for improving anaerobic digestion (AD) of ammonia-rich swine manure (initial ammonia-N similar to 5000 mg/L) was tested. The addition of 5 g/L ZVI powder apparently accelerated the acidification process to produce more volatile fatty acids (VFAs) and optimized the fermentation type by contributing to a lower system oxidation-reduction potential (ORP) level of -181.7 to-250.0 mV favorable for ethanol-type and butyric-type fermentation during day 14-30, in comparison with that of-164.3 to-216.3 mV in the control group favorable for propionic-type. Overall, ZVI significantly decreased the proportion of propionic acid from 49.8% to 30.9% while increased the proportion of n-butyric acid from 6.8% to 18.7%. Microbial analysis revealed that fast growing and ammonia-tolerant hydrogenotrophic Methanoculleus species were enriched with ZVI, helping achieve a 54.2% higher CH4 yield relative to control. Results from this study demonstrated the potential of ZVI addition to enhance AD of ammonia-rich animal manure.