期刊
BIORESOURCE TECHNOLOGY
卷 146, 期 -, 页码 317-323出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2013.07.096
关键词
Hydrogen production; Methane production; Waste activated sludge; Food waste; Two-stage fermentation
资金
- National High Technology Research and Development Program (863 Program), China [2012AA063502]
Batch experiments were conducted to produce hydrogen and methane from waste activated sludge and food waste by two-stage mesophilic fermentation. Hydrogen and methane production, energy yield, soluble organic matters, volatile solid removal efficiency and carbon footprint were investigated during two-stage digestion at various food waste proportions. The highest energy yield reached 14.0 kJ/g-VS at the food waste proportion of 85%, with hydrogen and methane yields of 106.4 ml-H-2/g-VS and 353.5 ml-CH4/g-VS respectively. The dominant VFA composition was butyrate for co-digestion and sole food waste fermentation, whereas acetate was dominate in VFA for sole waste activated sludge fermentation. The VS removal efficiencies of co-digestion were 10-77% higher than that of waste activated sludge fermentation. Only 0.1-3.2% of the COD in feedstock was converted into hydrogen, and 14.1-40.9% to methane, with the highest value of 40.9% in methane achieved at food waste proportion of 85%. (c) 2013 Elsevier Ltd. All rights reserved.
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