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http://dx.doi.org/10.17137/korrae.2019.27.4.25

Biogas Production from Sewage Sludge in 30L Microbial Electrolysis Cell  

Lee, Myoung-Eun (Department of Environmental Engineering, Gyeongnam National University of Science and Technology)
Ahn, Yongtae (Department of Energy Engineering, Gyeongnam National University of Science and Technology)
Shin, Seung Gu (Department of Energy Engineering, Gyeongnam National University of Science and Technology)
Seo, Sun-Chul (Wastewater Treatment Department, Youngjin Environment)
Chung, Jae Woo (Department of Environmental Engineering, Gyeongnam National University of Science and Technology)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.27, no.4, 2019 , pp. 25-33 More about this Journal
Abstract
Operating characteristics of a 30 L microbial electrolysis cell (MEC) for producing biogas from sewage sludge was studied. During the 32-day inoculation period, carbon dioxide concentration decreased and methane concentration increased with operating time, and the overall methane content of biogas was 69.1% with a production rate of 171.6 mL CH4/L·d. In fed-batch experiments for 6 operating cycles, CH4 concentration of 66.5~77.2% was obtained at a production rate of 184.9~372.9 mL CH4/L·d, COD, TS and VS removal efficiency ranged from 28.2 to 42.1%, 20.7 to 37.5% and 18.5 to 36.9%, respectively. The MEC system was observed to be stabilized as operating cycles were repeated after inoculation. In the last operating cycle, 5221 mL/L of methane was produced with CH4 yield of 316.7 L CH4/kg CODrem, and the energy recovery was 73%.
Keywords
Microbial electrolysis cell; anaerobic digestion; sewage sludge; methane production; energy recovery;
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Times Cited By KSCI : 1  (Citation Analysis)
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