Document Detail


Anaerobic co-digestion of coffee waste and sewage sludge.
MedLine Citation:
PMID:  16310117     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The feasibility of the anaerobic co-digestion of coffee solid waste and sewage sludge was assessed. Five different solid wastes with different chemical properties were studied in mesophilic batch assays, providing basic data on the methane production, reduction of total and volatile solids and hydrolysis rate constant. Most of the wastes had a methane yield of 0.24-0.28 m3 CH4(STP)/kg VS(initial) and 76-89% of the theoretical methane yield was achieved. Reduction of 50-73% in total solids and 75-80% in volatile solids were obtained and the hydrolysis rate constants were in the range of 0.035-0.063 d(-1). One of the solid wastes, composed of 100% barley, achieved a methane yield of 0.02 m3 CH4(STP)/kg VS(initial), reductions of 31% in total solids, 40% in volatile solids and achieved only 11% of the theoretical methane yield. However, this waste presented the highest hydrolysis rate constant. Considering all the wastes, an inverse linear correlation was obtained between methane yield and the hydrolysis rate constant, suggesting that hydrolysis was not the limiting factor in the anaerobic biodegradability of this type of waste.
Authors:
L Neves; R Oliveira; M M Alves
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Waste management (New York, N.Y.)     Volume:  26     ISSN:  0956-053X     ISO Abbreviation:  Waste Manag     Publication Date:  2006  
Date Detail:
Created Date:  2005-11-28     Completed Date:  2006-05-02     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  9884362     Medline TA:  Waste Manag     Country:  United States    
Other Details:
Languages:  eng     Pagination:  176-81     Citation Subset:  IM    
Affiliation:
Centro de Engenharia Biológica, Universidade do Minho, 4710-057 Braga, Portugal.
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MeSH Terms
Descriptor/Qualifier:
Anaerobiosis
Biodegradation, Environmental
Coffee*
Hydrolysis
Industrial Waste*
Methane / biosynthesis
Sewage / microbiology*
Waste Management / methods*
Chemical
Reg. No./Substance:
0/Coffee; 0/Industrial Waste; 0/Sewage; 74-82-8/Methane

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


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