An Effective Way of Anaerobic Digestion of Chicken Manure with Plant Biomass

Anaerobic digestion of animal manure is a popular disposal method. However, because of higher nitrogen content and relatively lower carbon source, chicken manure is difficult in accomplishing a successful and rapid anaerobic digestion process with earlier acidification to affect the biogas production. Straw and many other crop biomass is one of crop wastes which composed of abundant organic carbon source. In this paper, validity identification and factors affected gas production of co-digestion of chicken manure and rice straw were investigated. Groups added rice straw produced more higher gas than the control, and CH4 contents of groups added rice straw showed normal level which means added rice straw to chicken manure is useful to the biogas production. Affected degree of factors on co-digestion of chicken manure and retted rice straw followed the sequence of retted time>retted temperature>water content, and best retting condition was 70% of water content, 40 degrees C of retted temperature and 10 days of retted time.