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Semi-pilot scale production of hydrogen from Organic Fraction of Solid Municipal Waste and electricity generation from process effluents |
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| Affiliation: | 1. Department of Chemical Engineering, Cape Peninsula University of Technology, Bellville, Cape Town 7535, South Africa;2. Unit for Environmental Sciences and Management, North-West University, Potchefstroom 2520, South Africa;3. Energy Technologies Area, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA 94720, United States;4. DSI-NRF SARChI Clean Coal Technology Research Group, School of Chemical and Metallurgical Engineering, Faculty of Engineering and the Built Environment, University of the Witwatersrand, Wits 2050, Johannesburg, South Africa;5. The School of Biological Sciences, The University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region;6. Department of Chemical Engineering, Faculty of Engineering, Built Environment and Information Technology, University of Pretoria, Hatfield 0028, South Africa |
| Abstract: | The production of hydrogen from Organic Fraction of Solid Municipal Waste (OFSMW) was studied on a semi-pilot scale. The potential of generating electricity using the process effluents was further assessed using a two-chambered Microbial Fuel Cell. A maximum hydrogen fraction of 46.7% and hydrogen yield of 246.93 ml H2 g−1 Total Volatile Solids was obtained at optimum operational setpoints of 7.9, 30.29 °C and 60 h for pH, temperature and hydraulic retention time (HRT) respectively. A maximum electrical power density of 0.21 W m-2 (0.74 A m−2) was recorded at 500 Ω and the chemical oxygen demand (COD) removal efficiency of 50.1% was achieved from the process. The process economics of energy generation from organic wastes could be significantly improved by integrating a two-stage process of fermentative hydrogen production and electricity generation. |
| Keywords: | Fermentative hydrogen production Organic Fraction of Solid Municipal Waste (OFSMW) Electricity generation Microbial fuel cell (MFC) Bioenergy |
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