期刊
BIORESOURCE TECHNOLOGY
卷 101, 期 24, 页码 9577-9586出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.07.070
关键词
Extreme thermophilic biohydrogen production; Dark fermentation; Engineered heat treated granules
资金
- Fundacao para a Ciencia e Tecnologia (FCT)
- European Community [PTDC/BIO/69745/2006]
- FCT PhD [SFRH/BD/29823/2006, SFRH/BD/48965/2008]
- Danish Agency for Science, Technology and Innovation [2104-06-0004]
- Fundação para a Ciência e a Tecnologia [SFRH/BD/29823/2006, SFRH/BD/48965/2008, PTDC/BIO/69745/2006] Funding Source: FCT
In the present study, two granular systems were compared in terms of hydrogen production rate, stability and bacterial diversity under extreme thermophilic conditions (70 degrees C). Two EGSB reactors were individually inoculated with heat treated methanogenic granules (HTG) and HTG amended with enrichment culture with high capacity of hydrogen production (engineered heat treated methanogenic granules EHTG), respectively. The reactor inoculated with EHTG (R-EHTG) attained a maximum production rate of 2.71 H-2 I(-1)day(-1) in steady state. In comparison, the R-HTG containing the HTG granules was very unstable, with low hydrogen productions and only two peaks of hydrogen (0.8 and 1.51 H-2 I(-1)day(-1)). The presence of active hydrogen producers in the R-EHTG system during the reactor start-up resulted in the development of an efficient H-2-producing bacterial community. The results showed that engineered inocula where known hydrogen producers are co-inoculated with HTG is an efficient way to start up biohydrogen-producing reactors. (C) 2010 Elsevier Ltd. All rights reserved.
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