혐기성소화 슬러지 비율에 따른 미생물전기분해전지의 식종 특성 = Startup of Microbial Electrolysis Cells with different mixing ratio of Anaerobic Digested Sludge and Buffer solution

다국어 초록 (Multilingual Abstract)

In this study, the influence of anaerobic digested sludge and 50 mM PBS (phosphate buffer solution) mixing ratio (1:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:7) on hydrogen production and inoculation period were examined. MECs were operated in fed-batch mode with an applied voltage of 0.9 V. As a result, in the 1:1 mixing ratio reactor, 9.8-20.9 mL of hydrogen was produced with the highest hydrogen content of 66.8-79.6%. Hydrogen gas production and power density increased from after 12 days of inoculation for the 1:1 mixing ratio reactor. In case of 1:2, 1:3 and 1:4 mixing ratio reactor, the hydrogen gas production was 3.7-7.1 mL and the hydrogen gas content was 5.8-65.8%. The hydrogen gas yield in 1:5, 1:6 and 1:7 ratio reactors, was 0.50-0.69 mL and hydrogen content range was 1.8-7.1%. The mixing ratio was found to be suitable for hydrogen production and inoculation period by mixing ratio up to 1:4.

국문 초록 (Abstract)

실험실 규모 회분식 미생물전기분해전지 반응기 (유효부피 20 mL)를 이용하여 수소가스 생산 및 식종기간특성을 조사하였다. 총 6 cycle 동안 0.9 V를 인가하여 식종슬러지 혼합 비율 (혐기성소화 슬러지:50 mM PBS)에따른 수소생산 및 식종기간을 분석한 결과 혼합비 1:1 반응기에서 9.8-20.9 mL 수소를 생산하였으며, 수소함량은66.8-79.6%로 가장 높게 나타났다. 식종기간에 있어서는 혼합비 1:1 반응기 기준으로 약 12일 정도부터는 수소생산및 전류밀도가 증가하는 것으로 나타났다. 또한 혼합비 1:2, 1:3, 1:4 반응기의 경우 cycle (2-6 cycle)에 따라 수소가스 생산량이 3.7-7.1 mL, 농도 5.8-65.8%로 변화하였으며, 혼합비 1:5, 1:6, 1:7 반응기의 수소가스 생산량은 0.5-0.7 mL, 농도 1.8-7.1%로 나타나 최대 혼합비 1:4까지 식종하는 것이 적합할 것으로 판단된다.

참고문헌 (Reference)

• 1 정광화, "젖소분뇨로부터 최대 Biogas 생산을 위한 반건식 간헐주입 연속혼합 혐기성반응조 운전조건 도출" 한국폐기물자원순환학회 31 (31): 843-853, 2014
• 2 Park, C., "Upgrading of anaerobic digestion by incorporating two different hydrolysis processes" 100 (100): 164-167, 2005
• 3 Raynal, J., "Twophase anaerobic digestion of solid waste by a multiple liquefaction reactors process" 65 (65): 97-103, 1998
• 4 Eaton, A. D., "Standard methods for the examination of water &wastewater"
• 5 Verhelst, S., "Recent progress in the use of hydrogen as a fuel for internal combustion engines" 39 (39): 1071-1085, 2014
• 6 Rozendal, R., "Principle and perspectives of hydrogen production through biocatalyzed electrolysis" 31 (31): 1632-1640, 2006
• 7 Cusick, R. D., "Performance of a pilot-scale continuous flow microbial electrolysis cell fed winery wastewater" 89 (89): 2053-2063, 2011
• 8 Heidrich, E. S., "Performance of a pilot scale microbial electrolysis cell fed on domestic wastewater at ambient temperatures for a 12 month period" 173 : 87-95, 2014
• 9 Kim, K.-Y., "Nickel powder blended activated carbon cathodes for hydrogen production in microbial electrolysis cells" 2019
• 10 Kumar, G., "Microbial electrochemical systems for sustainable biohydrogen production: Surveying the experiences from a start-up viewpoint" 70 : 589-597, 2017
• 11 Logan, B. E., "Microbial Electrolysis Cells for High Yield Hydrogen Gas Production from Organic Matter" 42 (42): 8630-8640, 2008
• 12 Huang, W., "Low-temperature hydrothermal pretreatment followed by dry anaerobic digestion:A sustainable strategy for manure waste management regarding energy recovery and nutrients availability" 70 : 255-262, 2017
• 13 Wang, Y.-Z., "Influence of initial anolyte pH and temperature on hydrogen production through simultaneous saccharification and fermentation of lignocellulose in microbial electrolysis cell" 42 (42): 22663-22670, 2017
• 14 Cho, S.-K., "Improved hydrogen recovery in microbial electrolysis cells using intermittent energy input" 2018
• 15 Sim, J., "Hydrogen peroxide production in a pilot-scale microbial electrolysis cell" 19 : e00276-, 2018
• 16 Liu, W., "Hydrogen generation in microbial electrolysis cell feeding with fermentation liquid of waste activated sludge" 37 (37): 13859-13864, 2012
• 17 Lu, L., "Enhanced hydrogen production from waste activated sludge by cascade utilization of organic matter in microbial electrolysis cells" 46 (46): 1015-1026, 2012
• 18 Asztalos, J. R., "Enhanced digestion of waste activated sludge using microbial electrolysis cells at ambient temperature" 87 : 503-512, 2015
• 19 Logan, B. E., "Conversion of Wastes into Bioelectricity and Chemicals by Using Microbial Electrochemical Technologies" 337 (337): 686-690, 2012
• 20 Callaghan, F. J., "Co-digestion of waste organic solids: batch studies" 67 : 117-, 1999
• 21 McCarty, P. L., "Anaerobic waste treatment fundamentals, Part 1 : Chemistry and Microbiology" 107-112, 1964
• 22 Kadier, A., "A comprehensive review of microbial electrolysis cells (MEC) reactor designs and configurations for sustainable hydrogen gas production" 55 (55): 427-443, 2016