期刊
CHEMICAL ENGINEERING & TECHNOLOGY
卷 41, 期 4, 页码 687-695出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ceat.201700539
关键词
Anaerobic digestion; Biosensor; Electroactive biofilms; Geobacter anodireducens; Microbial electrochemical technologies
资金
- Federal Ministry of Food and Agriculture
- Federal Ministry for Economic Affairs and Energy
- Federal Ministry of Education and Research
- Helmholtz-Association
- Helmholtz Association within the Research Program Renewable Energies
- Kurt-Schwabe-Institut fur Mess- und Sensortechnik e.V. Meinsberg
The autonomous growth of Geobacter sp.-dominated biofilms on electrodes and their sensitivity on volatile fatty acids (VFAs) allows their application as biosensor. In this study, the implementation of a microbial electrochemical sensor in the anaerobic digestion (AD) process is reported. The amperometric sensor signal follows the acetate concentration profile in the AD process. Yet, the sensor's stability is impaired by the process conditions. Therefore, potential biofilm inhibitors are individually examined, i.e., high salt and NH4+ concentrations as well as fumarate as potential alternative electron acceptor. The results show no influence of high salinity on the signal, whereas ammonia at a concentration 5gL(-1) NH4+ acts as inhibitor, and fumarate is used as substrate for current generation.
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