PERormance of UASB reactor treating leachate from acidogenic fermenter in the two-phase anaerobic digestion of food waste

摘要

This study was conducted to investigate the performance of the upfolow anaerobic sludge blanket (UASB) reactor treating leachate from acidogenic fermenter in the two-phase anaerobic digestion of food waste. The chemical oxygen demand (COD) removal efficiency was consistently over 96/100 up to the loading rates of 15.8 g COD/ld. The methane production rate increased to 5.51/ld. Of all the COD removed, 92/100 was converted to methane and the remaining presumable to biomass. At loading rates over 18.7 g COD/ld, the COD removal efficiency decreased due to sludge flotation and washout in the reactor, which resulted from short HRT of less than 10.6 h.