Paper Title
Comparison The Effect Of Different Pretreatments On Ethanol Production From Lemon Peel (Citrus × Latifolia)
Abstract
The aim of this work is to open up the structure of lemon peel (Citrus × latifolia) with mild pretreatments. The
effects of autoclave, microwave and ultrasonic with or without acid addition were investigated on the amount of glucose,
soluble and insoluble lignin, furfural, yeast viability and bioethanol. The finding showed that autoclave- acid impregnated
sample, has the highest glucose release from lignocellulose materials (14.61 and 14.95 g/l for solvent exposed and untreated
sample, respectively) whereas at control sample glucose content was at its minimal level. Pretreatments cause decrease on
soluble and insoluble lignin and the highest decrease cause by autoclave following with microwave and ultrasonic
pretreatments (p≤5%). Moderate increase on furfural was seen at pretreated samples than control ones. Also, the most yeast
viability and bioethanol content was belong to autoclave samples especially acid- impregnated ones (40.33%). Comparison
between solvent treated and untreated samples indicated that significant difference was between two tested groups (p≤1%) in
terms of lignin, furfural, cell viability and ethanol content but glucose didn’t show significant difference. It imply that
solvent extraction don’t influences on glucose release from lignocellulose material of lemon peel but cause enhancement of
yeast viability and bioethanol production.
Keywords- Bioethanol, Lemon peel, Pretreatments, Solvent Extraction