Anode-biofilm electron transfer behavior and wastewater treatment under different operational modes of bioelectrochemical system.

Abstract:

:Anode-biofilm electron transfer behavior was investigated during the advanced wastewater treatment process by three bioelectrochemical systems (BESs): microbial fuel cell (MFC), MFC operated under short circuit condition (MSC), and microbial electrolysis cell (MEC). Under different operational modes, current produced by the anode biofilm varied from 0.92, 4.15 to 8.21mA in the sequence of MFC, MSC and MEC, respectively. The cyclic voltammetry test on the anode biofilm suggested that the current generation was achieved via various bioelectroactive species with formal potentials at -0.473, -0.402 and -0.345V (vs. SCE). Gibbs free energy and charge transfer resistance data demonstrated that different amounts of available bioelectroactive species functioned in different BESs. The comparative investigation among MFC, MSC and MEC suggested that MEC was the only feasible operational mode for advanced wastewater treatment, because of its superior current generation capability.

journal_name

Bioresour Technol

journal_title

Bioresource technology

authors

Wu B,Feng C,Huang L,Lv Z,Xie D,Wei C

doi

10.1016/j.biortech.2014.01.088

subject

Has Abstract

pub_date

2014-04-01 00:00:00

pages

305-9

eissn

0960-8524

issn

1873-2976

pii

S0960-8524(14)00113-8

journal_volume

157

pub_type

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