Solid state anaerobic co-digestion of tomato residues with dairy manure and corn stover for biogas production

• DOI: 10.1016/j.biortech.2016.01.111
• Publication Date: 2016-02-03T16:00:32Z
• Authors: Yangyang Li; Yu Li; Difang Zhang; Guoxue Li; Jiaxin Lu; Shuyan Li
• Keywords: 0211 other engineering and technologies; 02 engineering and technology; Fatty Acids, Volatile; Zea mays; 7. Clean energy; 6. Clean water; Manure; Dairying; Solanum lycopersicum; Waste Management; Biofuels; Animals; Cattle; Digestion; Anaerobiosis; Methane; Plant Shoots

Solid-state anaerobic co-digestion of tomato residues with dairy manure and corn stover was conducted at 20% total solids under 35°C for 45days. Results showed digestion of mixed tomato residues with dairy manure and corn stover improved methane yields. The highest VS reduction (46.2%) and methane yield (415.4L/kg VSfeed) were achieved with the ternary mixtures of 33% corn stover, 54% dairy manure, and 13% tomato residues, lead to a 0.5-10.2-fold higher than that of individual feedstocks. Inhibition of volatile fatty acids (VFAs) to biogas production occurred when more than 40% tomato residues were added. The results indicated that ternary mixtures diluted the inhibitors that would otherwise cause inhibition in the digestion of tomato residues as a mono-feedstock.