A PILOT STUDY- COTTON GIN TRASH TO ETHANOL

Date Issued:2014-08-05

Abstract

Cotton gin trash (CGT) collected from Australian cotton gins was evaluated for bioethanol production. A detailed compositional profiling of CGT reveals variation between ginning samples and a unique profile consisting of elevated extractive fractions (26-28%), lignins (17- 22%) and holocellulose (41-51%). Process conditions for converting CGT to fermentable sugars were experimentally optimised using multifactorial experimental designs. Process optimisation revealed CGT fibre required pretreatment at 180 degrees C in 0.8% H2SO4 for 12 min to maximise glucose recoveries by enzymatic cellulose hydrolysis. The highest ethanol productivity by yeast fermentations yielded 147 L ethanol/ metric tonne

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