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http://dx.doi.org/10.17137/korrae.2021.29.2.31

Feasibility test of treating slaughterhouse by-products using microbial electrolysis cells  

Song, Geunuk (Department of Energy Engineering, Gyeongsang National University)
Baek, Yunjeong (Department of Energy Engineering, Gyeongsang National University)
Seo, Hwijin (Department of Energy Engineering, Gyeongsang National University)
Kim, Daewook (Department of Energy Engineering, Gyeongsang National University)
Shin, Seunggu (Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University)
Ahn, Yongtae (Department of Energy Engineering, Future Convergence Technology Research Institute, Gyeongsang National University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.29, no.2, 2021 , pp. 31-38 More about this Journal
Abstract
The aim of this study is to evaluate the possibility of treating slaughterhouse by-products using microbial electrolysis cells (MECs). The diluted pig liver was fed to MEC reactors with the influent COD concentrations of 772, 1,222, and 1,431 mg/L, and the applied voltage were 0.3, 0.6, and 0.9 V. The highest methane production of 5.9 mL was obtained at the influent COD concentration of 1,431 mg/L and applied voltage of 0.9 V. In all tested conditions, COD removal rate was increased as the influent COD concentration increased with average removal rate of 62.3~81.1%. The maximum methane yield of 129~229 mL/g COD was obtained, which is approximately 80% of theoretical maximum value. It might be due to the bioelectrochemical reaction greatly increased the biodegradability of pig liver. Future research is required to improve the methane yield and digestibility through optimizing the reactor design and operating conditions.
Keywords
Slaughterhouse by-product; microbial electrolysis cell; applied voltage; methane gas;
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