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http://dx.doi.org/10.17137/korrae.2020.28.1.65

Evaluation of different types of mixed microbial culture for biomethanation of CO2  

Kim, Tae-Hoon (Department of Environmental Engineering, Chungbuk National University)
Lim, Byung-Seo (Environmental Review and Evaluation Institute, Korea Environment Corporation)
Yi, Sung-Ju (Department of Civil, Environmental and Biomedical Engineering)
Yun, Gwang-Sue (Department of Environmental Engineering, Chungbuk National University)
Ahn, Byung-Kyu (Department of Environmental Engineering, Chungbuk National University)
Enkhtsog, Michidmaa (Department of Environmental Engineering, Chungbuk National University)
Yun, Yeo-Myeong (Department of Environmental Engineering, Chungbuk National University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.28, no.1, 2020 , pp. 65-72 More about this Journal
Abstract
The aims of this study were to compare the biomethanation of CO2 through specific methanogenic activity (SMA) test which was inoculated with four different types of mixed microbial culture obtained from full-scale anaerobic digestion (AD) plants. The experimental results showed that CH4 conversion was the highest in the samples inoculated by seed sludge taken from ADs of food waste and brewery; under this condition, the produced biomethane contains 89.3-91.9% of CH4. Meanwhile, the lowest level was obtained in the sample from sewage sludge. The measured ratio of CH4 production rate to CO2 consumption rate in all reactors was higher than the theoretical value (1) in the middle of the period and soon dropped to 0.7-0.8. It might be due to changed metabolic pathways in the reactor by the degradation of residual organic matter and the increased activity of homoacetogenic bacteria.
Keywords
Biomethanation; $CO_2$; Hydrogenotrophic methanogenesis; Seed sludge; Specific methanogenic activity test;
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Times Cited By KSCI : 2  (Citation Analysis)
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