혐기성 소화 및 바이오 가스 수증기 개질을 통한 음식물 쓰레기 유래 수소 생산 시스템

System for hydrogen production from food waste through combining anaerobic digestion and biogas steam reforming

The conditions of anaerobic digestion and biogas reforming have been investigated and optimized for the construction a system for effective hydrogen production from food waste. A cubical reactor with hydrofoil agitator exhibits the highest biogas production for 60 days without a significant fluctuation. As a result, 84 L of biogas is produced from 1 kg of food waste. Reaction temperature and steam/methane ratio are investigated to promote hydrogen production in the biogas steam reforming reaction. The optimized reaction conditions include a reaction temperature of 700 ℃ and H2O/CH4 ratio of 1.0. Under these conditions, hydrogen can be produced via steam reforming of biogas generated from a two-stage anaerobic digestion reactor for 25 h without significant deactivation.