Treatment characteristics of two different substrates were investigated by two-phase anaerobic digestion at 20 °C. One substrate contained 87 percent carbohydrates and proteins and the other 94 percent carbohydrates and lipids. The anaerobic system consisted of a completely mixed reactor for hydrolysis and acidogenesis reactions, and an upflow filter for methanogeneous conversions. The experiments showed that the best phase separation occurs with 4 to 8 hours of detention times within the acid reactor. A single anaerobic system with upflow anaerobic filter alone for the same total detention times at the same substrate concentrations was operated for comparison. The results proved that two-phase digestion systems have higher digestion efficiencies than corresponding single-phase digestion systems. For substrates with more lipids the digestion efficiencies were very much greater.
Research Article|May 01 1995
Effects of phase separation in anaerobic digestion on different substrates
Water Sci Technol (1995) 31 (9): 153-162.
S. Jeyaseelan, T. Matsuo; Effects of phase separation in anaerobic digestion on different substrates. Water Sci Technol 1 May 1995; 31 (9): 153–162. doi: https://doi.org/10.2166/wst.1995.0355
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