Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7717846 | International Journal of Hydrogen Energy | 2014 | 6 Pages |
Abstract
The average hydrogen production rates (HPR) of 5.52Â L/L/d (hydrogen molar yield: 0.72Â mol H2/mol hexose) and 16.32Â L/L/d (hydrogen molar yield: 1.02Â mol H2/mol hexose) were obtained at hydraulic retention time (HRT) 8 and 4Â h respectively. The value of hydrogen production rate at HRT 4Â h was three times more than that at HRT 8Â h. The presence of bacteria Clostridium favors the hydrogen production from the acetic acid and butyric acid metabolic pathways which were determined by DGGE analysis. The biomass could not be maintained in the CECBR by washing out of the bacteria when the feeding rate was lowered to HRT 2Â h. This phenomenon resulted in less hydrogen production and ineffective degradation of hydrolyzate. But the continuously external circulating bioreactor could be steady operated at HRT 4Â h with an impressive hydrogen production rate by a rice straw hydrolyzate.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Chun-Min Liu, Shu-Yii Wu, Chen-Yeon Chu, Yen-Ping Chou,