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Bioresour Technol

Title:		Improving production of volatile fatty acids from food waste fermentation by hydrothermal pretreatment
Author(s):		Yin J; Wang K; Yang Y; Shen D; Wang M; Mo H;
Address:		"School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, China. Electronic address: jun.yin77@gmail.com. School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China; Zhejiang Provincial Key Laboratory of Solid Waste Treatment and Recycling, Hangzhou 310012, China. Zhejiang Lantu Environmental Protection Co., Ltd, Hangzhou 310014, China"
Journal Title:		Bioresour Technol
Year:		2014
Volume:		20140828
Issue:
Page Number:		323 - 329
DOI:		10.1016/j.biortech.2014.08.062
ISSN/ISBN:		1873-2976 (Electronic) 0960-8524 (Linking)
Abstract:		"Food waste (FW) was pretreated by a hydrothermal method and then fermented for volatile fatty acid (VFAs) production. The soluble substance in FW increased after hydrothermal pretreatment (???200 degrees C). Higher hydrothermal temperature would lead to mineralization of the organic compounds. The optimal temperature for organic dissolution was 180 degrees C, at which FW dissolved 42.5% more soluble chemical oxygen demand than the control. VFA production from pretreated FW fermentation was significantly enhanced compared with the control. The optimal hydrothermal temperature was 160 degrees C with a VFA yield of 0.908 g/g VSremoval. Butyrate and acetate were the prevalent VFAs followed by propionate and valerate. FW fermentation was inhibited after 200 degrees C pretreatment. The VFAs were extracted from the fermentation broth by liquid-liquid extraction. The VFA recovery was 50-70%. Thus, 0.294-0.411 g VFAs could be obtained per gram of hydrothermally pretreated FW (in dry weight) by this method"
Keywords:		"Acetates/analysis Biological Oxygen Demand Analysis *Bioreactors Butyrates/analysis Fatty Acids, Volatile/*biosynthesis Fermentation *Food *Hot Temperature Liquid-Liquid Extraction *Waste Products Water/*chemistry Food waste Hydrothermal pretreatment VFAs;"
Notes:		"MedlineYin, Jun Wang, Kun Yang, Yuqiang Shen, Dongsheng Wang, Meizhen Mo, Han eng Research Support, Non-U.S. Gov't England 2014/09/15 Bioresour Technol. 2014 Nov; 171:323-9. doi: 10.1016/j.biortech.2014.08.062. Epub 2014 Aug 28"