Biohydrogen production by dark fermentation of wheat powder solution: Effects of C/N and C/P ratio on hydrogen yield and formation rate

被引:147
作者
Argun, Hidayet [1 ]
Kargi, Fikret [1 ]
Kapdan, Flyi K. [1 ]
Oztekin, Rukiye [1 ]
机构
[1] Dokuz Eylul Univ, Dept Environm Engn, Izmir, Turkey
关键词
biohydrogen; Box-Wilson experiment design; dark fermentation; wheat powder solution (WPS); C/N and C/P ratio;
D O I
10.1016/j.ijhydene.2008.01.038
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 effects of C/N and C/P ratio on hydrogen yield and specific production rate were investigated in dark fermentation of wheat powder solution (WPS) by external addition of N and P since the wheat powder was N and P deficient. A Box-Wilson statistical experiment design approach was used. C/N ratio was varied between 20 and 200 while C/P ratio was between 50 and 1000. A quadratic response function was used to correlate the objective functions with the independent variables and the response function coefficients were determined by regression analysis. Hydrogen yield increased with increasing C/N and C/P ratios. Low nitrogen concentrations required low phosphorous contents for high hydrogen yields. A C/N ratio of 200 and C/P ratio of 1000 yielded the highest H-2 yield of 281. ml H-2 g(-1) starch at STP. SHPR also increased with increasing C/N and C/P ratios. Again the highest SHPR (98 ml H-2 g(-1) biomass h(-1) at STP) was obtained at C/N and C/P ratios of 200 and 1000, respectively. The C/N/P ratio maximizing the yield and formation rate of hydrogen was 100/0.5/0.1 (w w(-1) w(-1)). (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1813 / 1819
页数:7
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