Accelerated methanogenesis from effluents of hydrogen-producing stage in anaerobic digestion by mixed cultures enriched with acetate and nano-sized magnetite particles

被引：59

作者：

Yang, Zhiman ^{[1
]}

Xu, Xiaohui ^{[1
]}

Guo, Rongbo ^{[1
]}

Fan, Xiaolei ^{[1
]}

Zhao, Xiaoxian ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China

[2] Qingdao Univ, Coll Chem Sci & Engn, Qingdao 266071, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2015年 / 190卷

基金：

中国国家自然科学基金;

关键词：

Anaerobic digestion; Magnetite; Acetate; Rhodocyclaceae; SINGLE-STAGE; GEN; NOV; METHANE; 2-STAGE; FERMENTATION; DEGRADATION; INHIBITION; REDUCTION; DIVERSITY; BACTERIUM;

D O I：

10.1016/j.biortech.2015.04.057

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Potential for paddy soil enrichments obtained in the presence of nano-sized magnetite particles (named as PSEM) to promote methane production from effluents of hydrogen-producing stage in two-stage anaerobic digestion was investigated. The results showed that the addition of magnetite significantly accelerated methane production from acetate in a dose-independent manner. The results from high-throughput sequencing analysis revealed that Rhodocyclaceae-related species were selectively enriched, which were likely the key players for conversion of acetate to methane in PSEM. Compared to the paddy soil enrichments obtained in the absence of magnetite (named as PSEC), the maximum methane production rate in PSEM was significantly higher (1.5-5.5 times higher for the artificial medium and 0.2-1.7 times higher for the effluents). The accelerated methane production from the effluents indicated remarkably application potential of PSEM for improving performance of anaerobic digestion. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：132 / 139

页数：8

共 35 条

[1] Functional diversity and electron donor dependence of microbial populations capable of U(VI) reduction in radionuclide-contaminated subsurface sediments [J].