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Process parameter optimization of washing pretreatment for inorganic removal from rice husk

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dc.contributor.advisor Gunarathne D
dc.contributor.author Peiris DMA
dc.date.accessioned 2020
dc.date.available 2020
dc.date.issued 2020
dc.identifier.uri http://dl.lib.uom.lk/handle/123/16759
dc.description.abstract Rice husk is particularly known as one of the most common agricultural waste and the usage of rice husk in energy applications is typically via the combustion process. Using agricultural waste for combustion application can lead to slagging, corrosion and fouling of boilers due to some problematic elements such as K and Cl. Water washing removes those problematic elements from rice husk and hot water washing treatment improves the removal efficiency of those alkali oxides, halides and total ash content. Further, hot water washing pretreatment has been identified as an effective method compared to acid treatment and alkali treatment. This study is aimed at optimizing the washing parameters; washing temperature, time and water to biomass ratio. Effectiveness of washing was directly evaluated by conductivity measurements and the removal of inorganic elements. The second order kinetic model was successfully applied for the leaching of K and Cl species and the kinetic parameters were obtained. Washing temperature has significant effect on Si removal, a considerable effect on K removal and a very weak effect of Cl removal. Moreover, water/biomass ratio has an appreciable effect on K removal, a very weak effect on Cl removal whereas almost no effect of Si removal. Washing temperature of 65 ⁰C and water to biomass ratio of 100 was selected as the optimum process conditions. At the selected optimum conditions, about 84% of K and 81% of Cl can be removed while Si removal is insignificant. Within 10 minutes leaching time, 97% of leachable Cl and 81% leachable K can be removed. en_US
dc.language.iso en en_US
dc.subject CHEMICAL AND PROCESS ENGINEERING-Dissertations en_US
dc.subject SUSTAINABLE PROCESS DEVELOPMENT-Dissertations en_US
dc.subject AGRICULTURAL WASTES-Rice Husk en_US
dc.subject RICE HUSK-Treatment-Leachate en_US
dc.subject ALKALI en_US
dc.subject KINEMATICS en_US
dc.title Process parameter optimization of washing pretreatment for inorganic removal from rice husk en_US
dc.type Thesis-Full-text en_US
dc.identifier.faculty Engineering en_US
dc.identifier.degree MSc in Sustainable Process Development en_US
dc.identifier.department Department of Chemical & Process Engineering en_US
dc.date.accept 2020
dc.identifier.accno TH4228 en_US


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