Abstract
This study tried to explore the quantitative description of removal of hydroden sulphide (H2S) by bio-filtration. H2S is degraded by bacteria immobilized on the packing materials of Salak fruit seeds inside a column. Two kinetics models are proposed. In both models, the biofilm formed on the packing material is assumed to be thin, so intra-film gradient of H2S concentration can be neglected. In model 1, material balances of H2S in the bio-film as well as in the flowing gas are set-up. The growth of the bio-film is modelled by Monod’s equation. A set of three simultaneous partial differential equations are obtained. Model 2 is set-up using the same concepts as in model1, but the gas phase is assumed to be quasi-steady-state. This assumption reduces the partial differential equation in model 1 to be an ordinary differential equation which is easier to be solved. The comparisons of the results of model 1 and model 2 can be applied to justify the applications of quasi-steady-state approximation. It turned out that the differences of calculated H2S concentration results are approximately small, around 6 ppm. Hence, it can be concluded that quasi-steady-state approximation in the gas phase is suggested to be applied.
Highlights
Biogas, a potential biomass-based material for alternative energy, is produced by anaerobic decomposition of organic substances such as agricultural waste, animal waste, household waste, waste water, and household waste [1]
This study aims to develop a kinetic model that can be applied to design a large scale bio-filter for sulphide elimination from biogas
Special focus in this study is to explore the tolerability of quasi-steady-state approximation for the gas flowing through the column
Summary
A potential biomass-based material for alternative energy, is produced by anaerobic decomposition of organic substances such as agricultural waste, animal waste, household waste, waste water, and household waste [1]. Biogas is a side product of biological activity to produce energy by converting organic materials in anaerobic condition. The process is commonly recognized as fermentation. This process consists of three major steps, which are hydrolysis, asidogenesis and methanogenesis [2]. The compositions of biogas are typically methane (CH4) 5570%, carbon dioxide (CO2) 30-45% and hydrogen sulphide (H2S) 0-1.5% [3]. According to Pipatmanomai et al [4] even though the sulphide compounds contained in biogas are relatively small, they can corrode the materials of equipment utilizing biogas
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
