Optimisation of Bioethanol Production from some Plants Waste Using Acids Pretreatment

Description

Download Optimisation of Bioethanol Production from some Plants Waste Using Acids Pretreatment. Pure and Applied Chemistry students who are writing their projects can get this material to aid their research work.

Abstract

The potentials of Saw dust, Rice husk and Groundnut shells were investigated for bioethanol production. The substrates were pretreated using 2%, 4%, 6% and 8% solution of dilute H2SO4 and HCl.

The pretreated substrates were thermally treated at 105⁰C in order to detoxify them. The pretreated substrates obtained using different concentrations of acids were fermented using Saccharomyces cerevisiae (Yeast).

The results show that Rice husk treated with 4% H2SO4 (2.689%dryweight) has the highest result followed by the same sample treated with 2% H2SO4 (2.423%drywieght) then followed by the Saw dust treated with 8% H2SO4 (1.802%dryweight) in which the least result is observed with groundnut shells treated with 8% H2SO4 (0.862%dryweight).

All these were observed to be significantly different as calculated and checked between individuals differences at 0.5% confidence limit using ANOVA.

Also from the results, it is clear that the samples treated with sulphuric acid treatments were better at reserving the actual sugar (glucose) content.

Introduction

Biofuels (Bioethanol, Biodiesel, and Biogas) are fuels produced from biomass (a biodegradable material) for heating, electricity generation and transport purposes etc (Garba, 1999).

Bioethanol can be produced from any biological feedstock’s that contains appreciable amount of sugar/carbohydrate or materials that can be converted into sugar such as starch or cellulose.

Ethanol from renewable resources has been of interest in recent decades as an alternative fuel to the current fossil fuels.

Lignocelluloses biomass like wood and agricultural crops residue, e.g., straw and sugar beet pulp are potential raw materials for producing several high-value products like fuel ethanol and biodiesel (Yoswathana et al., 2010).

Because of the recent increase in the gas price and interest in environmental issues, the demand of ethanol as substitute of gasoline is rapidly increasing.

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