Biocathodic Methanogenic Community in an Integrated Anaerobic Digestion and Microbial Electrolysis System for Enhancement of Methane Production from Waste Sludge | Zendy

Weiwei Cai | Zendy; Wenzong Liu | Zendy; Chunxue Yang | Zendy; Ling Wang | Zendy; Bin Liang | Zendy; Thangavel Sangeetha | Zendy; Zechong Guo | Zendy; Aijie Wang | Zendy

Open Access

Biocathodic Methanogenic Community in an Integrated Anaerobic Digestion and Microbial Electrolysis System for Enhancement of Methane Production from Waste Sludge

Author(s) -

Weiwei Cai,

Wenzong Liu,

Chunxue Yang,

Ling Wang,

Bin Liang,

Thangavel Sangeetha,

Zechong Guo,

Aijie Wang

Publication year - 2016

Publication title -

acs sustainable chemistry and engineering

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.878

H-Index - 109

ISSN - 2168-0485

DOI - 10.1021/acssuschemeng.6b01221

Subject(s) - methanogen , methanosaeta , anaerobic digestion , methanobacterium , methane , microbial population biology , biogas , methanogenesis , sewage sludge , microbial consortium , chemistry , microbial electrolysis cell , waste management , pulp and paper industry , environmental chemistry , sewage treatment , environmental science , environmental engineering , microorganism , microbial fuel cell , bacteria , biology , anode , engineering , organic chemistry , genetics , electrode

Understanding the microbial community structure relative to enhancement of methane production from digestion of waste-activated sludge (WAS) coupled with a bioelectrochemical system is a key scientific question for the potential application of bioelectrochemistry in biogas production. Little has been known about the influence of electrode on the structure and function of microbial communities, especially methanogens in a bioelectrochemical anaerobic digestion (AD) reactor. Here, a hybrid reactor, which coupled bioelectrolysis and AD, was developed to enhance methane recovery from WAS. The methane production rate reached up to 0.0564 m3 methane/(m3 reactor*d) in the hybrid reactor at room temperature, which was nearly double than that of the control anaerobic reactor (0.0259 m3 methane/(m3reactor*d)) without bioelectrochemical device. Microbial community analysis revealed that hydrogenotrophic methanogen Methanobacterium dominated the cathode biofilm, which was the predominant contributor to accelerate the...

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