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Indexed by:期刊论文

Date of Publication:2013-05-01

Journal:BIORESOURCE TECHNOLOGY

Included Journals:SCIE、EI、PubMed

Volume:136

Page Number:273-280

ISSN No.:0960-8524

Key Words:Microbial electrolysis cell (MEC); Anaerobic reactor; Microbial community; Aze dye wastewater; Pyrosequencing

Abstract:Microbial electrolysis cell (MEC) devices are efficient for wastewater treatment, but its application was limited due to low anode oxidation rate. The objective of this study was to improve anode performance of a MEC combined anaerobic reactor (R1) for high concentration industrial wastewater treatment via dosing Fe(OH)(3). For the first 53 days without power, the addition of Fe(OH)(3) in R1 enhanced the degradation of reactive brilliant red X-3B dye and sucrose. Applying a voltage of 0.8 V in R1 resulted in a higher decolorization and COD removal through driving the redox reactions at electrodes under Fe(III)-reducing conditions. Real-time PCR and enzyme activity analysis showed that the abundance and azoreductase activity of bacteria were improved in RI. Pyrosequencing revealed that dominant populations in anode biofilm and R1 were more diverse and abundant than the common anaerobic reactor (R2), and there was a significant distinction among anode film, R1 and R2 in microbial community structure. (C) 2013 Elsevier Ltd. All rights reserved.