Biohydrogen production from pretreated corn cobs |
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| Affiliation: | 1. Department of Civil and Environmental Engineering, University of Western Ontario, 1151 Richmond st., London, Ontario N6A 5B9, Canada;2. Department of Chemical and Biochemical Engineering, University of Western Ontario, London, Ontario N6A 5B9, Canada;3. Department of Civil and Environmental Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada;1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China;2. Thin Film Centre, Scottish Universities Physics Alliance (SUPA), University of West of Scotland, Paisley PA1 2BE, UK;1. Institute of Modern Physics, Northwest University, Xi''an 710069, People''s Republic of China;2. The Key Laboratory of Biomedical Information Engineering of the Ministry of Education, School of Life Science and Technology, Xi''an Jiaotong University, Xi''an 710049, People''s Republic of China;1. Downstream Technology Division, CRAUN Research Sdn Bhd, 93055 Kuching, Sarawak, Malaysia;2. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia;3. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600 Bangi, Malaysia;1. Division of Physical Sciences & Engineering and KAUST Catalysis Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia;2. Division of Physical Sciences & Engineering and Advanced Membranes and Porous Material Center, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia |
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| Abstract: | In this study, the co-fermentability of four different pretreated corn cob streams at different mixing ratios was assessed. The four streams, denoted DP, DS, HP, and HS, were: two dilute acid pretreatment comprising one purge and one squeeze and two high pressure autohydrolysis comprising one purge and one squeeze. The “Purge” stream was taken from the steam percolation reactor during cooling and the “Squeeze” stream was recovered from the cooked biomass with a pressing step. In addition, the impact of furfural and 5-hydroxymethylfurfural (HMF) on biohydrogen production potential was evaluated. The DP:DS mix at 50:50 by volume achieved the maximum H2 yield of 265 (mL/gCOD sugars consumed). Furfural at concentrations of 0.21–1.09 g/L had no impact on H2 production rates and yields and HMF was below the inhibitory threshold of 0.14 g/L. A positive correlation was observed between the monomeric-to-polymeric sugars ratio and H2 production rates and yields. |
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| Keywords: | Dark fermentation Co-fermentation Hydrogen Batch |
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