Journal
BIORESOURCE TECHNOLOGY
Volume 220, Issue -, Pages 549-556Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2016.09.005
Keywords
Sediment microbial fuel cell; Organic matter content; Biogas accumulation; Microbial community; High-throughput sequencing
Funding
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120032110042]
- Tianjin city application basis and cutting-edge technology research plan Youth Project, China [14JCQNJC08300]
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This study constructed sediment microbial fuel cells (SMFCs) with different organic loadings without the amendment of external substrates, and it investigated how such variation affects electricity generation and microbial community structure. Results found sediment characteristics significantly influenced SMFC performance and appropriate organic content is important to maintain stable power outputs. SMFCs with loss of ignition (LOI) of 5% showed the most reliable performance in this study, while high organic content (LOI 10-16%) led to higher but very unstable voltage output because of biogas accumulation and worm activities. SMFCs with low organic content (1-3%) showed low power output. Different bacterial communities were found in SMFCs shown various power generation performance even those with similar organic contents. Thermodesulfovibrionaceae was found closely related to the system startup and Desulfobulbaceae showed great abundance in SMFCs with high power production. (C) 2016 Elsevier Ltd. All rights reserved.
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