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Upgrading of anaerobic digestion by incorporating two different hydrolysis processes.

Chulhwan C Park, Chunyeon C Lee, Sangyong S Kim, Yu Y Chen, and Howard A HA Chase

J Biosci Bioeng 100(2):164-7 (2005) PMID 16198258

The purpose of this study was to increase the efficiency of anaerobic digestion of waste activated sludge (WAS). Either thermochemical or biological hydrolysis was used as a pretreatment and the effects of both were investigated and compared. Two different three-stage digestion systems showed improved performance, although thermochemical hydrolysis showed better results than biological hydrolysis in a bench-scale operation. After anaerobic digestion with thermochemical pretreatment, the total chemical oxygen demand (tCOD) reduction, volatile solid (VS) reduction, methane yield and methane biogas content were 88.9%, 77.5%, 0.52 m3/kg VS and 79.5%, respectively. These results should help in determining the best hydrolysis pretreatment process for anaerobic digestion and in improving the design and operation of the large-scale treatment of WAS by anaerobic digestion with hydrolysis systems.

DOI: 10.1263/jbb.100.164
Version: za2963e q8za2 q8zb9 q8zc2 q8zdc q8ze2 q8zf1 q8zg0

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