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바이오수소 생산을 위한 2단 혐기발효공정의 초기거동 연구
( Wirasembada Yanuar Chandra ),신보라 ( Bo-ra Shin ),조진우 ( Jin-woo Cho ) 한국폐기물자원순환학회(구 한국폐기물학회) 2021 한국폐기물자원순환학회 춘계학술발표논문집 Vol.2021 No.-
For last decades, two-stage anaerobic fermentation system (TSAF) has been frequently applied to produce hydrogen and methane using various organic substrates or wastes. In this study, the performance of a TSAF reactor using high-strength synthetic wastewater as a substrate was investigated. The TSAF system consisted of two identical reactors: acidogenic reactor as the first stage (pH 5.5 ± 0.5, 37 C ± 3) and methanogenic reactor as the second stage (pH 6.5 ± 5.5, 37 C ± 3). The first hydrogen production was detected at 10th day where the maximum concentration of 38.24% was detected on 40th day when the pH stable around 5.52. On the other hand, the first methane production was detected at 31st day where the maximum concentration of 48.63% was detected on day 58th when the pH stood at 6.27. The hydrogen and methane still detected until the last day (60th day) with average percentage value of 14.57% and 26.20% respectively. Under a long and constant HRT (15 days in the first stage and 30 days at the second stage), maximum hydrogen yield of 0.87 mol H<sub>2</sub>/mol glucose and hydrogen production rate (HPR) 0.092 L/L/d while methane yield of 0.58 mol CH<sub>4</sub>/mol glucose and methane production rate (MPR) 0.51 L/L/d was obtained.