TY - JOUR ID - 6918 TI - Inhibition of Thermophilic Anaerobic Digestion of Waste Food by Long Chain Fatty Acids and Propionate JO - Iranian Journal of Biotechnology JA - IJB LA - en SN - 1728-3043 AU - Nosrati, Mohsen AU - Shojaosadati, Seyed Abbas AU - Sreekrishnan, Trichur Ramaswamy AU - Mukhopadhyay, Satya Narayan AD - Biotechnology Group, Chemical Engineering Department, Faculty of Engineering, Tarbiat Modarres University, Tehran, I.R. Iran. AD - Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology-Delhi (IIT), Hauz Khas, 110016, New Delhi, India. Y1 - 2004 PY - 2004 VL - 2 IS - 4 SP - 261 EP - 268 KW - Thermophilic anaerobic digestion KW - Waste food KW - Volatile fatty acids KW - Biogas DO - N2 - Different initial concentrations of slurry waste food (discarded food), with and without the overlying layerof fat derived from the waste were anaerobically digested at 55°C. At solids concentrations less than 20g/l no significant difference was observed in terms of volatile fatty acids and methane production betweensamples containing fat layer and samples without it. However, at higher concentrations, differencesbecame more obvious. Biogas released from a 50 g/l fat excluded sample was around 100% more than thegas generated from the fat included sample with the same initial solids concentration. Inhibition by propionatewas not significant in concentrations less than 2000 mg/l. In the absence of fats, the inhibition causedby accumulation of propionate could be overcome partially by the methanogenic bacteria. Based on theenergy generated in the form of methane, it was found that thermophilic anaerobic digestion of waste foodcould be an autothermal process for fat excluded feeds. UR - https://www.ijbiotech.com/article_6918.html L1 - https://www.ijbiotech.com/article_6918_6dc24c14d14d2f365140dc1a58ea8f48.pdf ER -