Studying the effects of reaction conditions on components of dairy manure and cellulose accumulation using dilute acid treatment

The objectives of this study were to statistically study the effects of reaction conditions of temperature, acid concentration, and reaction time on manure components of cellulose, hemicellulose, lignin, and nitrogen during dilute acid treatment of dairy manure; and to further optimize the accumulat...

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Bibliographic Details
Published in:Bioresource technology 2007-07, Vol.98 (10), p.1992-1999
Main Authors: Liao, Wei, Liu, Yan, Wen, Zhiyou, Frear, Craig, Chen, Shulin
Format: Article
Language:English
Subjects:
acid treatment
Agronomy. Soil science and plant productions
Animal productions
Animals
Biological and medical sciences
Cattle
Cellulose
Cellulose - chemistry
chemical composition
chemical reactions
Dairy manure
Dairying
Dilute acid treatment
enzymatic hydrolysis
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Hemicellulose
Hydrogen-Ion Concentration
Lignin
Lignin - chemistry
Manure
Nitrogen
Nitrogen - chemistry
Polysaccharides - chemistry
Refuse Disposal
renewable energy sources
sugars
Temperature
Terrestrial animal productions
Use of agricultural and forest wastes. Biomass use, bioconversion
Vertebrates
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Summary:The objectives of this study were to statistically study the effects of reaction conditions of temperature, acid concentration, and reaction time on manure components of cellulose, hemicellulose, lignin, and nitrogen during dilute acid treatment of dairy manure; and to further optimize the accumulation of cellulose for later enzymatic conversion to glucose. A 2 3 full factorial design was adopted to investigate the effects of the reaction conditions on each individual component and later followed by a 3-factor central composite design which was used to obtain the optimal conditions for cellulose accumulation. The results indicated that acid was the most important factor for changes of all the components. The results also showed that two other individual factors, reaction time and temperature, as well as the interactions among all three factors had significant influences on the changes. In addition, the optimal conditions for cellulose accumulation were 2.8 h reaction time, 140 °C reaction temperature, and 1.0% acid concentration. Under these conditions cellulose content reached 31.0% while hemicellulose, lignin and nitrogen content were 3.2%, 20.8% and 2.4%, respectively.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2006.08.021