期刊
CHEMOSPHERE
卷 302, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2022.134739
关键词
Anaerobic digestion; Biogas; Electrode-assisted; Start-up; Sensors; BES; MEC
资金
- MITACS Globalink Graduate Fellowship
- MITACS Accelerate Fellowship
- Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grant program
- Canada Research Chairs Program
- Utilities Kingston
- Champagne Bioresource Group
- The Beaty Water Research Centre
- Queen's University
This study conducted batch and bench-scale experiments to investigate the factors affecting the performance of anaerobic reactors, including pH fluctuations, ammonia inhibition, and bioaugmentation. The results showed that electrode-assisted anaerobic digestion can increase biogas production, and bioaugmentation also has a positive effect on increasing biogas production.
To better understand anaerobic digestion (AD) conditions during start-up, a series of batch and bench-scale studies were conducted to investigate conditions affecting the performance of the anaerobic reactors, including pH fluctuations, ammonia inhibition, and bioaugmentation. Capacitive soil moisture sensors were placed inside the AD reactors to provide near real-time microbial monitoring under experimental batch conditions and to create a microbial electrolysis cell (MEC) environment. After an eight-day digestion process at 40 degrees C, the capacitive soil moisture sensors performed as a rudimentary microbial activity tracking device. However, the electrodes had a statistically significant impact on biogas production with a small potential 0.8 V having a stabilizing effect on AD at 40 degrees C during start-up. Furthermore, electrode-assisted AD noted a biogas output 63.7% higher than the conventional AD without electrodes. Conversely, the bioaugmented electrode-assisted AD showed a 7% increase in biogas volume when compared to the non-bioaugmented batch.
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