Modeling of reaction kinetics in generation of hydrogen from wastewater by microbial electrolysis
Autor: | Kruthika Parappa, Ujwal Shreenag Meda, Lourdu Antony Raj Molayan Amritanatan |
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Jazyk: | angličtina |
Rok vydání: | 2021 |
Předmět: |
Electrolysis
Hydrogen business.industry 020209 energy Fossil fuel chemistry.chemical_element Biomass 02 engineering and technology 010501 environmental sciences Pulp and paper industry 01 natural sciences Electrohydrogenesis law.invention Environmental sciences Wastewater chemistry law Yield (chemistry) 0202 electrical engineering electronic engineering information engineering Microbial electrolysis cell GE1-350 business 0105 earth and related environmental sciences |
Zdroj: | E3S Web of Conferences, Vol 287, p 04010 (2021) |
ISSN: | 2267-1242 |
Popis: | High carbon footprints and limited availability of fossil fuels have motivated researchers to find alternatives to fossil fuels and the ways of producing them. Hydrogen is an alternative fuel and can be generated by electrohydrogenesis in a Microbial Electrolysis Cell (MEC) using wastewater. At times, the microorganisms known as exoelectrogens are added externally to the wastewater in the form of biomass. Biomass serves as a parameter to optimize the yield of hydrogen. In this research work an attempt is made to understand the effect of the biomass concentration on the substrate utilization by the exoelectrogens and product formation. This research work also aims at studying the biochemical reaction kinetics and to identify a model that best describes the kinetics of the reactions involved, at the electrodes. It was observed that on increasing the biomass concentration from 0.7g/L to 1.4 g/L, the gas liberation rate increased from 9.42 ml/day to 15.33 ml/day and substrate utilization increased from 86.8% to 94.3%. This was in close agreement with the solution of the identified model. It was found out that the energy efficiency of MEC improved substantially by 30% and the energy demand was decreased by 38.5% when the initial biomass concentration was doubled. |
Databáze: | OpenAIRE |
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