화학공학소재연구정보센터
Chemical Engineering Research & Design, Vol.107, 43-51, 2016
Cooked and uncooked food waste: A viable feedstock for generation of value added products through biorefinery approach
In the municipal solid waste, both cooked food waste (CFW) and uncooked food waste (UFW) are present, which need stabilization. In the proposed process, simultaneous generation of biogas, biomanure and a mixture of volatile fatty acids (VFA's) through anaerobic biorefinery approach were examined. The experimentations divulged that CFW having an average total solids (TS) and volatile solids (VS) in the range of 23% and 17%, yielded biogas of 0.47 m(3)/(kg VS reduced) and biomanure of 0.29 kg/(kg CFW) in single stage biomethanation process, whereas when the same waste was subjected to two stage process (acidogenic followed by methanogenic), it resulted in getting VFA's of 0.44 kg/(kg VS reduced), biogas of 0.18 m3/(kg VS reduced) and biomanure of 0.27 kg/(kg CFW). Similarly, UFW having average TS and VS in the range of 10% and 9%, yielded biogas of 0.38 m(3)/(kg VS reduced), biomanure of 0.13 kg/(kg UFW) and VFA's of 0.31 kg/(kg VS reduced), biogas of 0.14 m(3)/(kg of VS reduced), biomanure of 0.12 kg/(kg UFW) in single and two stage processes, respectively. The study disclosed that two stage process was preferred over single stage for obtaining VFA, biogas and biomanure that are known as value added products. (C) 2015 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.