Engineering strategies for the enhanced photo-H2 production using effluents of dark fermentation processes as substrate

被引:53
作者
Chen, Chun-Yen [1 ,2 ]
Yeh, Kuei-Ling [1 ]
Lo, Yung-Chung [1 ]
Wang, Hui-Min [3 ]
Chang, Jo-Shu [1 ,2 ]
机构
[1] Natl Cheng Kung Univ, Dept Chem Engn, Tainan, Taiwan
[2] Natl Cheng Kung Univ, Sustainable Environm Res Ctr, Tainan 70101, Taiwan
[3] Kaohsiung Med Univ, Dept Fragrance & Cosmet Sci, Kaohsiung, Taiwan
关键词
Dark fermentation; Optical fiber; Photo H-2 fermentation; Rhodopseudomonas palustris; Solar energy; PHOTOTROPHIC HYDROGEN-PRODUCTION; BACTERIUM RHODOPSEUDOMONAS-CAPSULATA; VOLATILE FATTY-ACIDS; PHOTOSYNTHETIC BACTERIUM; WASTE-WATER; RHODOBACTER-SPHAEROIDES; H-2; PRODUCTION; PHOTOHYDROGEN PRODUCTION; CLOSTRIDIUM-BUTYRICUM; MOLECULAR-HYDROGEN;
D O I
10.1016/j.ijhydene.2009.11.070
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 major obstacle of combining dark and photo fermentation for high-yield biohydrogen production is substrate inhibition while using dark fermentation effluent as the sole substrate. To solve this problem, the dark fermentation broth was diluted with different dilution ratio to improve photo-H-2 production performance of an indigenous purple non-sulfur bacterium Rhodopseudomonas palustris WP3-5. The best photo-H-2 production performance occurred at a dilution ratio of 1:2, giving a highest overall H-2 production rate of 10.72 ml/l/h and a higher overall H-2 yield of 6.14 mol H-2/mol sucrose. The maximum H-2 content was about 88.1% during the dilution ratio of 1:2. The photo-H-2 production performance was further improved by supplying yeast extract and glutamic acid as the nutrient. The results indicate that the overall H-2 production rate and H-2 yield increased to 17.02 ml/l/h and 10.25 mol H-2/mol sucrose, respectively. Using a novel solar-energy-excited optical fiber photobioreactor (SEEOFP) with supplementing tungsten filament lamp (TL) irradiation, the overall H-2 production rate was improved to 17.86 ml/l/h. Meanwhile, the power consumption by combining SEEOFP and TL was about 37.1% lower than using TL alone. This study demonstrates that using optimal light sources and proper dilution of dark fermentation effluent, the performance of photo-H-2 production can be markedly enhanced along with a reduction of power consumption. (C) 2009 Professor T. Nejat Veziroglu. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:13356 / 13364
页数:9
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