Journal article
Enhancing Biogas Production from Anaerobically Digested Wheat Straw Through Ammonia Pretreatment
Chinese journal of chemical engineering, Vol.22(5), pp.576-582
05/2014
Handle:
https://hdl.handle.net/2376/118480
Abstract
Aqueous ammonia was used to pretreat wheat straw to improve biodegradability and provide nitrogen source for enhancing biogas production. Three doses of ammonia (2%, 4%, and 6%, dry matter) and three moisture contents (30%, 60%, and 80%, dry matter) were applied to pretreat wheat straw for 7 days. The pretreated wheat straws were anaerobically digested at three loading rates (50, 65, and 80 g·L−1) to produce biogas. The results indicated that the wheat straw pretreated with 80% moisture content and 4% ammonia achieved the highest methane yield of 199.7 ml·g−1 (based on per unit volatile solids loaded), with shorter digestion time (T80) of 25 days at the loading rate of 65 g·L−1 compared to untreated one. The main chemical compositions of wheat straw were also analyzed. The cellulose and hemicellulose contents were decomposed by 2%-20% and 26%-42%, respectively, while the lignin content was hardly removed, cold-water and hot-water extracts were increased by 4%-44%, and 12%-52%, respectively, for the ammonia-pretreated wheat straws at different moisture contents. The appropriate C/N ratio and decomposition of original chemical compositions into relatively readily biodegradable substances will improve the biodegradability and biogas yield.
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Details
- Title
- Enhancing Biogas Production from Anaerobically Digested Wheat Straw Through Ammonia Pretreatment
- Creators
- Dongyan YANG - Center for Resources and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, ChinaYunzhi PANG - Center for Resources and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, ChinaHairong YUAN - Center for Resources and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, ChinaShulin CHEN - Department of Biological Systems Engineering, Washington State University at Pullman, WA 99164-6120, USAJingwei MA - Department of Biological Systems Engineering, Washington State University at Pullman, WA 99164-6120, USALiang YU - Department of Biological Systems Engineering, Washington State University at Pullman, WA 99164-6120, USAXiujin LI - Center for Resources and Environmental Research, Beijing University of Chemical Technology, Beijing 100029, China
- Publication Details
- Chinese journal of chemical engineering, Vol.22(5), pp.576-582
- Academic Unit
- Biological Systems Engineering, Department of
- Publisher
- Elsevier B.V
- Grant note
- 2011DFA90800 / China-US International Cooperation Project 2008AA062401 / National High Technology Research and Development Program of China
- Identifiers
- 99900583059001842
- Language
- English
- Resource Type
- Journal article