| Title: | Utilization of alkali-tolerant strains in fermentation of excess sludge |
| Author(s): | Jie W; Peng Y; Ren N; Li B; |
| Address: | "State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Department of Food and Environment Engineering, East University of Heilongjiang, Harbin 150086, China. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China; Key Laboratory of Beijing for Water Quality Science and Water Environment Recovery Engineering, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China. Electronic address: pyz@bjut.edu.cn. State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China. Department of Civil and Environmental Engineering, University of Connecticut, Storrs, CT 06269, USA" |
| DOI: | 10.1016/j.biortech.2014.01.107 |
| ISSN/ISBN: | 1873-2976 (Electronic) 0960-8524 (Linking) |
| Abstract: | "This study aimed at exploring a new approach for producing volatile fatty acids (VFAs) from excess sludge (ES). Two representative alkali-tolerant bacteria (HIT-01 and HIT-02) were isolated from ES, and inoculated separately or jointly into ES to investigate their effects on VFAs accumulation, soluble organic compounds concentrations, and bacterial community structure of ES under alkaline anaerobic conditions (pH 10.0). Four fermentation conditions were examined for 20days. Joint-inoculation with the two strains achieved the highest VFAs concentration (3139mg/L). Acetic and propionic acids were the dominant acid species. On the 9th day, all the inoculated ES had the higher concentrations of soluble organic compounds than the un-inoculated control ES. Denaturing gradient gel electrophoresis (DGGE) analysis revealed that these two strains (HIT-01 and HIT-02) became predominant in the bacterial community during alkaline anaerobic fermentation. The results demonstrated that bioaugmentation might be useful for enhancing VFAs accumulation from ES" |
| Keywords: | "Adaptation, Physiological/*drug effects Alkalies/*pharmacology Ammonium Compounds/metabolism Bacteria/isolation & purification/*metabolism Bacterial Proteins/metabolism Biological Oxygen Demand Analysis Carbohydrates/analysis DNA, Ribosomal/genetics Denat;" |
| Notes: | "MedlineJie, Weiguang Peng, Yongzhen Ren, Nanqi Li, Baikun eng Research Support, Non-U.S. Gov't England 2014/02/18 Bioresour Technol. 2014 Apr; 157:52-9. doi: 10.1016/j.biortech.2014.01.107. Epub 2014 Feb 4" |
