| Title: | Alkyl polyglucose enhancing propionic acid enriched short-chain fatty acids production during anaerobic treatment of waste activated sludge and mechanisms |
| Author(s): | Luo J; Feng L; Chen Y; Sun H; Shen Q; Li X; Chen H; |
| Address: | "State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China. State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China; Research & Service Center for Environmental Industry, Yancheng 224051, Jiangsu Province, China. Electronic address: leiyufeng_tj@yahoo.com. State Key Laboratory of Pollution Control and Resources Reuse, School of Environmental Science and Engineering, Tongji University, 1239 Siping Road, Shanghai 200092, China. Electronic address: yinguangchen@yahoo.com. School of Environmental Science and Engineering, Donghua University, 2999 North Renmin Road, Shanghai, 201620, China" |
| DOI: | 10.1016/j.watres.2015.01.041 |
| ISSN/ISBN: | 1879-2448 (Electronic) 0043-1354 (Linking) |
| Abstract: | "Adding alkyl polyglucose (APG) into an anaerobic treatment system of waste activated sludge (WAS) was reported to remarkably improve the production of short-chain fatty acids (SCFAs), especially propionic acid via simultaneously accelerating solubilization and hydrolysis, enhancing acidification, inhibiting methanogenesis and balancing carbon to nitrogen (C/N) ratio of substrate. Not only the production of SCFAs, especially propionic acid, was significantly improved by APG, but also the feasible operation time was shortened. The SCFAs yield at 0.3 g APG per gram of total suspended solids (TSS) within 4 d was 2988 +/- 60 mg chemical oxygen demand (COD) per liter, much higher than that those from sole WAS or sole WAS plus sole APG. The corresponding yield of propionic acid was 1312 +/- 25 mg COD/L, 7.9-fold of sole WAS. Mechanism investigation showed that during anaerobic treatment of WAS in the presence of APG both the solubilization and hydrolysis were accelerated and the acidification was enhanced, while the methanogenesis was inhibited. Moreover, the activities of key enzymes involved in WAS hydrolysis and acidification were improved through the adjustment of C/N ratio of substrates with APG. The abundance of microorganisms responsible for organic compounds hydrolysis and SCFAs production was also observed to be greatly enhanced with APG via 454 high-throughput pyrosequencing analysis" |
| Keywords: | "Anaerobiosis Bacteria/*metabolism Fatty Acids, Volatile/*metabolism Glucans/*metabolism Organic Chemicals/*chemistry Particulate Matter/*chemistry Propionates/metabolism Sewage/chemistry Surface-Active Agents/*metabolism Wastewater/chemistry Water Polluta;" |
| Notes: | "MedlineLuo, Jingyang Feng, Leiyu Chen, Yinguang Sun, Han Shen, Qiuting Li, Xiang Chen, Hong eng Research Support, Non-U.S. Gov't England 2015/02/24 Water Res. 2015 Apr 15; 73:332-41. doi: 10.1016/j.watres.2015.01.041. Epub 2015 Feb 7" |
