| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6368154 | Water Research | 2011 | 9 Pages |
Abstract
To operate an anaerobic digester at low hydraulic retention time (HRT) is welcome in practice. This study characterized the extracellular biological organic matter (EBOM) and supernatant organics for a sewage sludge digested in a lab-scale mesophilic digester (5Â l) running at an HRT of 20, 15 or 10Â d. The hydrophilic and hydrophobic acid fractions were the principal components in the sludge EBOM. The hydrolysis rates for hydrophobic acid fraction related EBOM at 10Â d HRT and that of hydrophilic fraction related proteins in supernatant at 20Â d HRT limited the anaerobic processes. Improved hydrolysis of soluble hydrophilic fraction assisted improving digester performance at 20Â d HRT. To shorten digestion HRT, efficiency of hydrophobic acid fraction hydrolysis has to be practiced.
Related Topics
Physical Sciences and Engineering
Earth and Planetary Sciences
Earth-Surface Processes
Authors
Liang-Liang Wei, Qing-Liang Zhao, Kai Hu, Duu-Jong Lee, Chun-Mei Xie, Jun-Qiu Jiang,