Influence of Goethite on Anaerobic Fermentation of Organic Fraction of Municipal Solid Waste(OFMSW)

Effects of goethite on the anaerobic fermentation process of organic fraction of municipal solid wastes,including the biogas production and characteristics of leachate,were investigated in the anaerobic digesters constructed by PVC. The results showed that the addition of goethite promoted hydrolysis and acidogenesis efficiency of solid wastes and gas production rate. The total gas volume was 163. 4 L,which increased by 20% compared to the blank. The intermediate products of Fe2 +,NH+ 4-N,NO-3-N,COD and organic acids in the leachate were analyzed. Results showed that the addition of goethite reduced the system ORP to- 124 mV which could improve the activity of the anaerobic microorganism. Addition of goethite could also promote the utilization of organic acids which decreased the inhibition effects of organic acids on the anaerobic microorganism.