4.4 Article

Enhancing biomethane production and pyrene biodegradation by addition of bio-nano FeS or magnetic carbon during sludge anaerobic digestion

期刊

ENVIRONMENTAL TECHNOLOGY
卷 42, 期 22, 页码 3496-3507

出版社

TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2020.1733674

关键词

Bio-nano FeS; magnetic carbon; DIET; anaerobic digestion; pyrene degradation

资金

  1. National Natural Science Foundation of China [21777069]
  2. Key Research and Development Technology of Ningxia Hui Autonomous Region (special project for foreign science and technology cooperation) [2019BFH02008]
  3. Key Research and Development Technology of Shanxi [201903D211013]
  4. National Key Research and Development Program of China [2016YFE0112800]
  5. Jiangsu Synergetic Innovation Center for Advanced Bio-Manufacture [XTE1832]
  6. Qing Lan Project of Jiangsu Universities
  7. Six Talent Peaks Project in Jiangsu Province

向作者/读者索取更多资源

The addition of bio-nano FeS or magnetic carbon can effectively reduce the accumulation of short-chain fatty acids, prevent acidification, increase methane production, and enhance pyrene removal during anaerobic digestion, by promoting the activity and growth of microorganisms and facilitating direct interspecific electron transfer.
Pyrene exerts toxic effects on methanogens during anaerobic digestion of sludge, thus affecting the efficiency of sludge treatment. This study evaluated the facilitated direct interspecific electron transfer (DIET) between bacteria and methanogens when bio-nano FeS or magnetic carbon is added into anaerobic reactors. Results showed that adding 200 mg/L bio-nano FeS or magnetic carbon clearly reduced the accumulation of short-chain fatty acids and avoided acidification during 25 days of anaerobic digestion. The methane productions were 98.38 L/kg total solid (TS) and 73.69 L/kg TS in the bio-nano FeS and magnetic carbon systems, respectively, which accelerated methane production by 58.1% and 33.4%, respectively, compared with the control system (40.26 L/kg TS). The pyrene removal rates reached 77.5% and 72.1% in the bio-nano FeS and magnetic carbon systems, whereas it was only 40.8% in the control system. Analysis of microbial community structure revealed that methanogens (e.g. Methanosarcina and Methanosaeta) and extracellular electron-transfer bacteria (e.g. Pseudomonas, Cloastridia, and Synergistetes) were enriched in the reactors added with bio-nano FeS or magnetic carbon. This result indicates that the addition of bio-nano FeS or magnetic carbon may promote the activity and growth of microorganisms to improve the efficiency of methane production and pyrene degradation by enhancing DIET.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.4
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据