Document Detail


Hydrogen and methane production by co-digestion of waste activated sludge and food waste in the two-stage fermentation process: Substrate conversion and energy yield.
MedLine Citation:
PMID:  23948269     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
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 14.0kJ/g-VS at the food waste proportion of 85%, with hydrogen and methane yields of 106.4ml-H2/g-VS and 353.5ml-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%.
Authors:
Xinyuan Liu; Ruying Li; Min Ji; Li Han
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2013-7-26
Journal Detail:
Title:  Bioresource technology     Volume:  146C     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2013 Jul 
Date Detail:
Created Date:  2013-8-16     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  317-323     Citation Subset:  -    
Copyright Information:
Copyright © 2013 Elsevier Ltd. All rights reserved.
Affiliation:
School of Environmental Science and Engineering, Tianjin University, Weijin Road 92, Tianjin 300072, China. Electronic address: liuxinyuan11@163.com.
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