Sugar palm (Arenga pinnata) SAP fermentation using saccharomyces cerevisiae Biotech 2185.

Date

2012

Degree

Bachelor of Science in Chemical Engineering

Major Course

Major in Sugar Technology

College

College of Engineering and Agro-Industrial Technology (CEAT)

Abstract

Sugar palm (Arenga pinnata) sap was used as substrate for ethanol fermentation since it is rich in fermentative sugar. Fermentation of sugar palm sap was done to determine the time profile, brix-reducing sugar content correlation, brix-ethanol yield correlation, and effect of varying brix and inoculum loading to ethanol yield. Fresh sugar palm sap was diluted/evaporated to have the desired brix of 8, 16 and 24. The correlation of brix and reducing sugar content was defined by the linear equation: =0.53581x+0.78281 with R² equal to 0.98853. The high R² value (relative to 1.0) shows that the given equation can be used to approximate the reducing sugar concentration given the brix of the sap. The time-profile of the fermented samples showed that ethanol yield peaked at the third day of fermentation. Brix and ethanol yield is correlated by the equation:=0.20179x+1.49217 with R²=0.85898. Removing brix 28 will result to a correlation of y=0.268x+0.268 x+ 0.607 with R²=0.980. Also,it was observed that increasing the brix of the sap and inoculum loading increased the ethanol yield. Brix 8 had the lowest ethanol yield (2.60%v/v) after 72 hours of fermentation while brix 24 had the highest ethanol yield (6.84% v/v). Lowest ethanol yield (5.299% v/v_ was observed at 5% inoculum loading while highest ethanol yields (7.439% v/v) was obtained at 15% inoculum loading.

Language

English

Location

UPLB College of Engineering and Agro-Industrial Technology (CEAT)

Call Number

LG 993.5 2012 E62 C66

Document Type

Thesis

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