| Thermal wet oxidation improves anaerobic biodegradability of raw and digested biowaste. | |
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MedLine Citation:
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PMID: 15260343 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Anaerobic digestion of solid biowaste generally results in relatively low methane yields of 50-60% of the theoretical maximum. Increased methane recovery from organic waste would lead to reduced handling of digested solids, lower methane emissions to the environment, and higher green energy profits. The objective of this research was to enhance the anaerobic biodegradability and methane yields from different biowastes (food waste, yard waste, and digested biowaste already treated in a full-scale biogas plant (DRANCO, Belgium)) by assessing thermal wet oxidation. The biodegradability of the waste was evaluated by using biochemical methane potential assays and continuous 3-L methane reactors. Wet oxidation temperature and oxygen pressure (T, 185-220 degrees C; O2 pressure, 0-12 bar; t, 15 min) were varied for their effect on total methane yield and digestion kinetics of digested biowaste. Measured methane yields for raw yard waste, wet oxidized yard waste, raw food waste, and wet oxidized food waste were 345, 685, 536, and 571 mL of CH/g of volatile suspended solids, respectively. Higher oxygen pressure during wet oxidation of digested biowaste considerably increased the total methane yield and digestion kinetics and permitted lignin utilization during a subsequent second digestion. The increase of the specific methane yield for the full-scale biogas plant by applying thermal wet oxidation was 35-40%, showing that there is still a considerable amount of methane that can be harvested from anaerobic digested biowaste. |
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Authors:
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Geert Lissens; Anne Belinda Thomsen; Luc De Baere; Willy Verstraete; Birgitte K Ahring |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Environmental science & technology Volume: 38 ISSN: 0013-936X ISO Abbreviation: Environ. Sci. Technol. Publication Date: 2004 Jun |
Date Detail:
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Created Date: 2004-07-20 Completed Date: 2004-10-05 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0213155 Medline TA: Environ Sci Technol Country: United States |
Other Details:
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Languages: eng Pagination: 3418-24 Citation Subset: IM |
Affiliation:
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Environmental Microbiology and Biotechnology, BioCentrum-DTU, Technical University of Denmark, DK-2800 Lyngby, Denmark. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Bacteria, Anaerobic
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physiology* Biodegradation, Environmental Kinetics Methane / analysis Oxidation-Reduction Refuse Disposal / methods* Temperature Water |
| Chemical | |
Reg. No./Substance:
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74-82-8/Methane; 7732-18-5/Water |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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