Response of microbial community structure to pre-acclimation strategies in microbial fuel cells for domestic wastewater treatment. (June 2017)

• Record Type: Journal Article
• Authors: Park, Younghyun; Cho, Hyunwoo; Yu, Jaechul; Min, Booki; Kim, Hong Suck; Kim, Byung Goon; Lee, Taeho
• Is Part Of: Bioresource technology. Volume 233(2017)
• Page Start: 176
• Page End: 183
• Publication Date: 2017-06
• Subjects: Air-cathode microbial fuel cell -- Anode-respiring bacteria -- Domestic wastewater -- Microbial community structure -- Pyrosequencing; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.02.101
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Three strategies were applied for substrate pre-acclimation of air-cathode MFCs. Serial pre-acclimation with acetate-glucose produced higher current from wastewater. Microbial communities were significantly varied by pre-acclimation strategies. Anaerolinaceae seemed to play important roles in MFCs using domestic wastewater. Abstract: Microbial community structures and performance of air-cathode microbial fuel cells (MFCs) inoculated with activated sludge from domestic wastewater were investigated to evaluate the effects of three substrate pre-acclimation strategies: 1, serial pre-acclimation with acetate and glucose before supplying domestic wastewater; 2, one step pre-acclimation with acetate before supplying domestic wastewater; and 3, direct supply of domestic wastewater without any pre-acclimation. Strategy 1 showed much higher current generation (1.4 mA) and Coulombic efficiency (33.5%) than strategies 2 (0.7 mA and 9.4%) and 3 (0.9 mA and 10.3%). Pyrosequencing showed that microbial communities were significantly affected by pre-acclimation strategy. Although Proteobacteria was the dominant phylum with all strategies, Actinobacteria was abundant when MFCs were pre-acclimated with glucose after acetate. Not only anode-respiring bacteria (ARB) in the genus Geobacter but also non-ARB belonging to the family Anaerolinaceae seemed to play important roles in air-cathode MFCs to produce electricity from domestic wastewater.