Hyperthermal Hydrolysis Treatment of Thermal Anaerobic Digestion Residues-Quantitative Evaluations of Kitchen Waste and Paper Anaerobic Digestion Samples

The effect of biological hyperthermal (80°C) hydrolysis treatment on anaerobic digestion residue was evaluated using thermal digestion residue samples of kitchen waste and paper. Residues of continuous thermal anaerobic digestion were hydrolyzed at 80°C C for a day and their biogas production volumes were measured by batch analysis. One day of hydrolysis converted 8 to 14% of solid COD to soluble COD, and 6.5, 5.1, and 3.5m3 of biogas were produced from one-ton samples of anaerobic digestion residue from kitchen waste, a kitchen waste and paper mixture, and paper, respectively. Assuming a continuous semi-dry treatment process, a hyperthermal hydrolysis treatment will make biogas production 17%, 17 and 16% in the cases of kitchen waste, a kitchen waste and paper mixture, and paper, respectively.