Biohydrogen production by immobilized Enterobacter aerogenes on functionalized multi-walled carbon nanotube |
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| Affiliation: | 1. Department of Chemical Technologies, Iranian Research Organization for Science and Technology (IROST), P.O. Box 3353-5111, Tehran, Iran;2. Department of Biotechnology, Iranian Research Organization for Science and Technology (IROST), P.O. Box 3353-5111, Tehran, Iran;1. Dokuz Eylul University, The Graduate School of Natural and Applied Sciences, Biotechnology Department, Izmir, Turkey;2. Dokuz Eylul University, Department of Environmental Engineering, Izmir, Turkey;1. Fuel Cell Institute, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia;2. Petroleum Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar, 32610, Perak, Malaysia;3. National Centre for Water Treatment and Desalination Technology, KACST, P.O. Box 6086, Riyadh, 11442, Saudi Arabia;4. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia;5. Faculty of Integrated Technologies, Universiti Brunei Darussalam, JalanTunku Link, Gadong, BE 1410, Brunei Darussalam;6. King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box 2455, Riyadh, 11451, Saudi Arabia;7. School of Chemical Science and Food Technology, Faculty of Science and Technology, Universiti Kebangsaaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia;8. Chemical Engineering Department, Universiti Teknologi PETRONAS, Seri Iskandar, 32610, Perak, Malaysia;1. Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia (UKM), 43600, Bangi, Selangor, Malaysia;2. Department of Biotechnology-Biochemical Engineering, Kulliyyah of Engineering, International Islamic University Malaysia (IIUM), P.O. Box 10, 50728, Gombak, Kuala Lumpur, Malaysia;3. Department of Chemical Engineering, Feng Chia University, Taichung 40724, Taiwan |
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| Abstract: | Hydrogen production by immobilized Enterobacter aerogenes on functionalized multi-walled carbon nanotube (MWCNT-COOH) in repeated batch mode was studied. Fourier transform infrared (FTIR) spectroscopy and field emission scanning electron microscopy (FESEM) were employed to confirm immobilization of E. aerogenes successfully. The effect of MWCNT-COOH concentrations (0.2, 0.6, and 1.2 mg/mL) on hydrogen production was investigated. The present study showed that immobilized E. aerogenes on 1.2 mg/mL MWCNT-COOH resulted in higher hydrogen yield (2.2 moL/mol glucose), hydrogen production rate (2.72 L/L.h), and glucose degradation efficiency (96.20%) and shorter the lag phase (1 h) compared to the free E. aerogenes. Modified Gompertz and Logistic models were employed to predict the cumulative hydrogen production successfully. |
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| Keywords: | Biohydrogen production Carbon nanotube Dark fermentation Immobilization |
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