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Bioresour Technol

Title:		Selective simplification and reinforcement of microbial community in autothermal thermophilic aerobic digestion to enhancing stabilization process of sewage sludge by conditioning with ferric nitrate
Author(s):		Jin N; Shou Z; Yuan H; Lou Z; Zhu N;
Address:		"School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. Electronic address: nwzhu@sjtu.edu.cn"
Journal Title:		Bioresour Technol
Year:		2016
Volume:		20160109
Issue:
Page Number:		106 - 113
DOI:		10.1016/j.biortech.2016.01.012
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"The effect of ferric nitrate on microbial community and enhancement of stabilization process for sewage sludge was investigated in autothermal thermophilic aerobic digestion. The disinhibition of volatile fatty acids (VFA) was obtained with alteration of individual VFA concentration order. Bacterial taxonomic identification by 454 high-throughput pyrosequencing found the dominant phylum Proteobacteria in non-dosing group was converted to phylum Firmicutes in dosing group after ferric nitrate added and simplification of bacteria phylotypes was achieved. The preponderant Tepidiphilus sp. vanished, and Symbiobacterium sp. and Tepidimicrobium sp. were the most advantageous phylotypes with conditioning of ferric nitrate. Consequently, biodegradable substances in dissolved organic matters increased, which contributed to the favorable environment for microbial metabolism and resulted in acceleration of sludge stabilization. Ultimately, higher stabilization level was achieved as ratio of soluble chemical oxygen demand to total chemical oxygen demand (TCOD) decreased while TCOD reduced as well in dosing group comparing to non-dosing group"
Keywords:		"Aerobiosis Biological Oxygen Demand Analysis Bioreactors/*microbiology Fatty Acids, Volatile/metabolism Ferric Compounds/*pharmacology Gram-Positive Bacteria/*drug effects/growth & development/metabolism Nitrates/*pharmacology Nitrogen/analysis Sewage/*ch;"
Notes:		"MedlineJin, Ningben Shou, Zongqi Yuan, Haiping Lou, Ziyang Zhu, Nanwen eng Research Support, Non-U.S. Gov't England 2016/01/17 Bioresour Technol. 2016 Mar; 204:106-113. doi: 10.1016/j.biortech.2016.01.012. Epub 2016 Jan 9"