期刊
BIOTECHNOLOGY FOR BIOFUELS
卷 7, 期 -, 页码 -出版社
BIOMED CENTRAL LTD
DOI: 10.1186/s13068-014-0119-5
关键词
Biohydrogen; Thermoanaerobacterium aotearoense SCUT27/Delta ldh; Non-sterilization; Sugarcane bagasse; Acid hydrolysate; Dark fermentation
资金
- National Natural Science Foundation of China [21276096, 21276093]
- Science and Technology Planning Project of Guangdong, China [2011B020309005, 2011A080403022]
- CAS Key Laboratory of Microbial Physiological and Metabolic Engineering, Institute of Microbiology, Chinese Academy of Sciences [KLIM-201301]
- Open Project Program of Guangdong Key Laboratory of Fermentation and Enzyme Engineering, SCUT [FJ2013006]
- Pearl River New-Star of Science & Technology - Guangzhou City [2012 J2200012]
Background: Hydrogen is regarded as an attractive future energy carrier for its high energy content and zero CO2 emission. Currently, the majority of hydrogen is generated from fossil fuels. However, from an environmental perspective, sustainable hydrogen production from low-cost lignocellulosic biomass should be considered. Thermophilic hydrogen production is attractive, since it can potentially convert a variety of biomass-based substrates into hydrogen at high yields. Results: Sugarcane bagasse (SCB) was used as the substrate for hydrogen production by Thermoanaerobacterium aotearoense SCUT27/Delta ldh. The key parameters of acid hydrolysis were studied through the response surface methodology. The hydrogen production was maximized under the conditions of 2.3% of H2SO4 for 114.2 min at 115 degrees C. Using these conditions, a best hydrogen yield of 1.86 mol H-2/mol total sugar and a hydrogen production rate (HPR) of 0.52 L/L h were obtained from 2 L SCB hydrolysates in a 5-L fermentor, showing a superior performance to the results reported in the literature. Additionally, no obvious carbon catabolite repression (CCR) was observed during the fermentation using the multi-sugars as substrates. Conclusions: Considering these advantages and theimpressive HPR, the potential of hydrogen production using T. aotearoense SCUT27/Delta ldh is intriguing. Thermophilic, anaerobic fermentation using SCB hydrolysates as the medium by this strain would be a practical and eco-friendly process.
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