Document Detail

Buffer requirements for enhanced hydrogen production in acidogenic digestion of food wastes.
MedLine Citation:
PMID:  19576761     Owner:  NLM     Status:  MEDLINE    
The requirements for pH buffer addition for hydrogen production and acidogenesis in batch acidogenic digestion of a food waste (FW) feedstock with limited alkalinity was studied at various initial pH conditions (6.0-8.0). The results showed that, without buffer addition, hydrogen production from this feedstock was insignificant regardless of the initial pH. With buffer addition, hydrogen production improved significantly if the initial pH was greater than 6.0. Substantial hydrogen production occurred when the pH at the end of the batch digestion was higher than 5.5. The maximum hydrogen production was found to be 120 mL/g VS added when the initial pH was 6.5 and buffer addition was in the range of 15-20 mmol/g VS. The effect of pH buffering on the formation of volatile fatty acids (acetic acid, propionic acid and butyric acid) was similar to its effect on hydrogen production. The results of this study clearly indicated shifts in the metabolic pathways with the pH of fermentation. The changes in metabolic pathways impacted upon the dosage of buffer that was required to achieve maximum hydrogen generation.
Heguang Zhu; Wayne Parker; Robert Basnar; Alex Proracki; Pat Falletta; Michel Béland; Peter Seto
Publication Detail:
Type:  Journal Article     Date:  2009-07-02
Journal Detail:
Title:  Bioresource technology     Volume:  100     ISSN:  1873-2976     ISO Abbreviation:  Bioresour. Technol.     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-07-20     Completed Date:  2009-09-28     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9889523     Medline TA:  Bioresour Technol     Country:  England    
Other Details:
Languages:  eng     Pagination:  5097-102     Citation Subset:  IM    
Aquatic Ecosystems Management Research Division, Water Science and Technology, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington, Ontario, Canada L7R 4A6.
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MeSH Terms
Acids / chemistry*
Carbohydrates / chemistry
Ethanol / analysis
Fatty Acids, Volatile / analysis
Hydrogen / chemistry*
Hydrogen-Ion Concentration
Metabolic Networks and Pathways
Time Factors
Waste Products / analysis*
Reg. No./Substance:
0/Acids; 0/Buffers; 0/Carbohydrates; 0/Fatty Acids, Volatile; 0/Waste Products; 1333-74-0/Hydrogen; 64-17-5/Ethanol

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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