Influence of pH on fermentative hydrogen production from sweet sorghum extract

被引：79

作者：

Antonopoulou, Georgia ^{[1
,2
]}

Gavala, Hariklia N. ^{[1
,2
]}

Skiadas, Ioannis V. ^{[1
,2
]}

Lyberatos, Gerasimos ^{[1
,2
]}

机构：

[1] Univ Patras, Dept Chem Engn, GR-26500 Patras, Greece

[2] Inst Chem Engn & High Temp Chem Proc, GR-26504 Patras, Greece

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2010年 / 35卷 / 05期

关键词：

Sweet sorghum; Hydrogen; pH; Continuous fermentation; Biohydrogen; HYDRAULIC RETENTION TIME; BIOHYDROGEN PRODUCTION; H-2; PRODUCTION; WASTE-WATER; STARCH; GROWTH;

D O I：

10.1016/j.ijhydene.2009.12.175

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The present study focused on the influence of pH on the fermentative hydrogen production from the sugars of sweet sorghum extract, in a continuous stirred tank bioreactor. The reactor was operated at a Hydraulic Retention Time of 12 h and a pH range of 3 5-6 5 The maximum hydrogen production rate and yield were obtained at pH 5 3 and were 1752 54 ml. H-2/d or 3.50 +/- 0 07 L H-2/L reactor/d and 0 93 +/- 0 03 mol H-2/mol glucose consumed or 10.51 L H-2/kg sweet sorghum, respectively The main metabolic product at this pH value was butyric acid The hydrogen productivity and yield were still at high levels for the pH range of 5 3-4 7, suggesting a pH value of 4 7 as optimum for hydrogen production from an economical point of view, since the energy demand for chemicals is lower at this pH At this pH range, the dominant fermentation product was butyric acid but when the pH culture sharply decreased to 3 5, hydrogen evolution ceased and the dominant metabolic products were lactic acid and ethanol (C) 2010 Professor T Nejat Veziroglu Published by Elsevier Ltd All rights reserved

引用

页码：1921 / 1928

页数：8

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