Please use this identifier to cite or link to this item:
標題: Temperature effects on fermentative hydrogen production from xylose using mixed anaerobic cultures
作者: Lin, Chiu-Yue
Wu, Chein-Chung
Hung, Chun-Hsiung
關鍵字: Hydrogen production;Mixed anaerobic cultures;Temperature;Xylose
出版社: Elsevier Ltd.
Project: International Journal of Hydrogen Energy, Volume 33, Issue 1, Page(s) 43-50.
Sewage sludge microflora were anaerobically cultivated in a chemostat-type anaerobic bioreactor at temperatures of 30-55 ◦C, a pH of 7.1 and a hydraulic retention time of 12 h to determine the hydrogen production efficiency from xylose (20 g-COD/L). It was demonstrated that hydrogen production of the enriched sewage sludge microflora (dominated by Clostridia species) was temperature-dependent in hydrogen gas content, hydrogen yield, hydrogen production rate (HPR) and specific HPR with values of 25.1-42.2% (v/v), 0.4-1.4 mol-H2/mol-xylose, 0.06-0.24 mol-H2/L-day and 0.02-0.10 mol-H2/g-VSS-day, respectively, and the above values peaked when being operated at 50 ◦C. A transition temperature of 45 ◦C existed by having a lowest hydrogen production efficiency. Butyrate and ethanol were the major soluble metabolite products for thermophilic and mesophilic fermentation, respectively. The liquid metabolite concentration fractions and microbial community analysis indicate that the differences in hydrogen production efficiency between each tested temperature might relate to the shifts in metabolic pathway or microbial community. Thermodynamic analysis using HPR values and Arrhenius equation showed that the activation energy was 74.7 kJ/mol. Strategies based on temperature control for optimal hydrogen production from xylose using natural mixed cultures are proposed.
ISSN: 0360-3199
DOI: 10.1016/j.ijhydene.2007.09.001
Appears in Collections:環境工程學系所

Show full item record

Google ScholarTM




Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.