Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9603162 | Journal of Bioscience and Bioengineering | 2005 | 4 Pages |
Abstract
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.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Bioengineering
Authors
Chulhwan Park, Chunyeon Lee, Sangyong Kim, Yu Chen, Howard A. Chase,