A novel alternate feeding mode for semi-continuous anaerobic co-digestion of food waste with chicken manure

• DOI: 10.1016/j.biortech.2014.04.077
• Publication Date: 2014-05-09T03:01:46Z
• Authors: Ming Wang; Xianli Sun; Pengfei Li; Lili Yin; Dan Liu; Yingwei Zhang; Wenzhe Li; Guoxiang Zheng
• Keywords: Waste Products; Time Factors; Hydrogen-Ion Concentration; 01 natural sciences; 7. Clean energy; 6. Clean water; Refuse Disposal; 12. Responsible consumption; Manure; Bioreactors; Ammonia; Food; Biofuels; 11. Sustainability; Costs and Cost Analysis; Animals; Anaerobiosis; Chickens; Methane; 0105 earth and related environmental sciences

A novel alternate feeding mode was introduced to study the possibilities of improving methane yield from anaerobic co-digestion of food waste (FW) with chicken manure (CM). Two kinds of feeding sequence (a day FW and next day CM (FM/CM), two days FM and the third day CM (FW/FM/CM)) were investigated in semi-continuous anaerobic digestion and lasted 225 days, and the mono-digestions of FW and CM were used as control group, respectively. The feeding sequence of FW/CM and mono-digestion of CM were observed to fail to produce gas at hydraulic retention time (HRT) of 70 days due to the ammonia inhibition, however, the mode of FW/FM/CM was proved to successfully run at HRT of 35 days with a higher OLR of 2.50 kg L(-1)d(-1) and obtain a higher methane production rate of 507.58 ml g(-1) VS and volumetric biogas production rate of 2.1 L L(-1)d(-1).