| Buffer requirements for enhanced hydrogen production in acidogenic digestion of food wastes. | |
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MedLine Citation:
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PMID: 19576761 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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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. |
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Authors:
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Heguang Zhu; Wayne Parker; Robert Basnar; Alex Proracki; Pat Falletta; Michel Béland; Peter Seto |
Publication Detail:
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Type: Journal Article Date: 2009-07-02 |
Journal Detail:
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Title: Bioresource technology Volume: 100 ISSN: 1873-2976 ISO Abbreviation: Bioresour. Technol. Publication Date: 2009 Nov |
Date Detail:
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Created Date: 2009-07-20 Completed Date: 2009-09-28 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9889523 Medline TA: Bioresour Technol Country: England |
Other Details:
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Languages: eng Pagination: 5097-102 Citation Subset: IM |
Affiliation:
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Aquatic Ecosystems Management Research Division, Water Science and Technology, Environment Canada, 867 Lakeshore Road, P.O. Box 5050, Burlington, Ontario, Canada L7R 4A6. hzhu@biorem.biz |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acids
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chemistry* Buffers Carbohydrates / chemistry Ethanol / analysis Fatty Acids, Volatile / analysis Food* Hydrogen / chemistry* Hydrogen-Ion Concentration Metabolic Networks and Pathways Solubility Time Factors Waste Products / analysis* |
| Chemical | |
Reg. No./Substance:
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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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