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National Chung Hsing University Institutional Repository - NCHUIR > 工學院 > 環境工程學系所 > 依資料類型分類 > 期刊論文 >  Fermentative hydrogen production from starch using natural mixed cultures

Please use this identifier to cite or link to this item: http://nchuir.lib.nchu.edu.tw/handle/309270000/126100

標題: Fermentative hydrogen production from starch using natural mixed cultures
作者: Lin, Chiu-Yue;Chang, Chao-Chi;Hung, Chun-Hsiung
Contributors: 國立中興大學環境工程學系
National Chung Hsing University,Department of Environmenral Engineering
Miao-zhen Luo
關鍵字: Fermentation;Hydrogen production;Paper mill sludge microflora;PH;Starch
日期: 2008-5
Issue Date: 2012-10-19 15:59:05 (UTC+8)
Publisher: Elsevier Ltd.
摘要: Batch and continuous tests were conducted to evaluate fermentative hydrogen production from starch (at a concentration of chemical oxygen demand (COD) 20 g/L) at 35 °C by a natural mixed culture of paper mill wastewater treatment sludge. The optimal initial cultivation pH (tested range 5-7) and substrate concentration (tested range 5-60-gCOD/L) were evaluated by batch reactors while the effects of hydraulic retention time (HRT) on hydrogen production, as expressed by hydrogen yield (HY) and hydrogen production rate (HPR), were evaluated by continuous tests. The experimental results indicate that the initial cultivation pH markedly affected HY, maximum HPR, liquid fermentation product concentration and distribution, butyrate/acetate concentration ratio and metabolic pathway. The optimal initial cultivation pH was 5.5 with peak values of HY 1.1 mol-H2/mol-hexose maximum HPR 10.4 mmol-H2/L/h and butyrate concentration 7700 mg-COD/L. In continuous hydrogen fermentation, the optimal HRT was 4 h with peak HY of 1.5 mol-H2/mol-hexose, peak HPR of 450 mmol-H2/L/d and lowest butyrate concentration of 3000 mg-COD/L. The HPR obtained was 280% higher than reported values. A shift in dominant hydrogen-producing microbial population along with HRT variation was observed with Clostridium butyricum, C. pasteurianum, Klebshilla pneumoniae, Streptococcus sp., and Pseudomonas sp. being present at efficient hydrogen production at the HRTs of 4-6 h. Strategies based on the experimental results for optimal hydrogen production from starch are proposed.
Relation: International Journal of Hydrogen Energy, Volume 33, Issue 10, Page(s) 2445-2453.
Appears in Collections:[依資料類型分類] 期刊論文
[依教師分類] 洪俊雄
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