Effects of foam nickel supplementation on anaerobic digestion: Direct interspecies electron transfer

被引：64

作者：

Guo, Xiaobo ^{[1
,2
]}

Sun, Chihe ^{[1
,2
]}

Lin, Richen ^{[3
,4
]}

Xia, Ao ^{[1
,2
]}

Huang, Yun ^{[1
,2
]}

Zhu, Xianqing ^{[1
,2
]}

Show, Pau-Loke ^{[5
]}

Murphy, Jerry D. ^{[3
,4
]}

机构：

[1] Chongqing Univ, Key Lab Low Grade Energy Utilizat Technol & Syst, Minist Educ, Chongqing 400044, Peoples R China

[2] Chongqing Univ, Coll Energy & Power Engn, Inst Engn Thermophys, Chongqing 400044, Peoples R China

[3] Univ Coll Cork, MaREI Ctr, Environm Res Inst, Cork, Ireland

[4] Univ Coll Cork, Sch Engn, Cork, Ireland

[5] Univ Nottingham, Fac Engn, Dept Chem & Environm Engn, Malaysia Campus,Jalan Broga Sernenyih, Selangor Darul Ehsan 43500, Malaysia

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2020年 / 399卷

基金：

中国国家自然科学基金; 爱尔兰科学基金会; 欧盟地平线“2020”;

关键词：

Direct interspecies electron transfer; Methane production; Industrial wastewater; Biofilm; Biogas; VOLATILE FATTY-ACIDS; WASTE ACTIVATED-SLUDGE; MICROBIAL COMMUNITIES; METHANE PRODUCTION; SYNTROPHIC METABOLISM; SULFATE REDUCTION; HYDROGEN; DENITRIFICATION; METHANOGENESIS; METHANOSAETA;

D O I：

10.1016/j.jhazmat.2020.122830

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Stimulating direct interspecies electron transfer with conducive materials is a promising strategy to overcome the limitation of electron transfer efficiency in syntrophic methanogenesis of industrial wastewater. This paper assessed the impact of conducive foam nickel (FN) supplementation on syntrophic methanogenesis and found that addition of 2.45 g/L FN in anaerobic digestion increased the maximum methane production rate by 27.4 % (on day 3) while decreasing the peak production time by 33 % as compared to the control with no FN. Cumulative methane production from day 2 to 6 was 14.5 % higher with addition of 2.45 g/L FN than in the control. Levels of FN in excess of 2.45 g/L did not show benefits. Cyclic voltammetry results indicated that the biofilm formed on the FN could generate electrons. The dominant bacterial genera in suspended sludge were Dechlorobacter and Rikenellaceae DMER64, whereas that in the FN biofilm was Clostridium sensu stricto 11. The dominant archaea Methanosaeta in the FN biofilm was enriched by 14.1 % as compared to the control.

引用

页数：10

共 54 条

[21] Enhancing anaerobic digestion in anaerobic integrated floating fixed-film activated sludge (An-IFFAS) system using novel electron mediator suspended biofilm carriers [J].