초록
A novel bio-electrohydrolysis system (BEH) based on self-inducing electrogenic activity was designed as pretreatment device to enhance biohydrogen (H<SUB>2</SUB>) production efficiency from food waste. Two-stage hybrid operation with hydrolysis in the initial stage and acidogenic fermentation of the resulting hydrolysate (after hydrolysis) for H<SUB>2</SUB> production in the second stage was evaluated. Application of variable external resistances viz., 10Ω, 100Ω, 1000Ω and closed circuit (CC) influenced the hydrolysis of substrate in BEH system and hydrogen production in acidogenic reactor compared to control. Pretreated substrate at 100Ω documented higher H<SUB>2</SUB> production (1.05l) than 10Ω (0.93l), CC (0.91l), 1000Ω (0.88l) and control operation (0.68l). Comparatively, 10Ω documented higher substrate degradation (53.4%) followed by CC (52.42%), 100Ω (49.51%), 1000Ω (47.57%) and control (43.68%). Voltammetric profiles were in agreement with the observed bio-electrohydrolysis and H<SUB>2</SUB> production efficiency.