Encapsulation of rambutan peel ethyl-acetate extract using corn starch or gelatin, placed in perforated pouches, and dipped in sugar palm neera to delay fermentation in alcohol production

Taniman, Stevannie Christie (2016) Encapsulation of rambutan peel ethyl-acetate extract using corn starch or gelatin, placed in perforated pouches, and dipped in sugar palm neera to delay fermentation in alcohol production. Bachelor thesis, Universitas Pelita Harapan.

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Abstract

Several studies have been reported that rambutan (Nephelium lappaceum L.) peel ethyl-acetate extracts contain bioactive compounds that possess fermentation inhibitor activity. This research was intended to investigate rambutan peel ethylacetate extract encapsulated with corn starch or gelatin, and both packaged in filter-nylon pouch and dipped in sugar palm neera (Arenga pinnata Merr.) to delay alcoholic fermentation for alcohol production. The rambutan peel ethyl-ACETATE extracts used in this research was in the concentrations of 1, 2 and 3%. Both are encapsulated, pouched and dipped in sugar palm neera and allow to ferment for seven days. The physicochemical characteristics (pH, total titratable acidity, total dissolved solid, total reducing sugar, total sugar, and alcohol content) and microbial counts were determined. The results showed that all treatments applied exhibit partial inhibition of alcoholic fermentation, indicated by lower alcohol content than control. The alcohol content result was used to determine the pouch withdrawal time with the aim to resume the inhibited alcoholic fermentation; corn starch on day 2, 4, 8 and gelatin on day 7, 10 and 11. After the pouch immersed into the treated neera was withdrawn. The physicochemical characteristics (pH, total dissolved solid, and alcohol content) were determined. The results showed that the alcoholic fermentation in sugar palm neera treated with corn starch encapsulated extracts was resumed after withdrawal and alcohol generated was higher than control. On opposite, sugar palm neera treated with gelatin encapsulated peel extracts did not show any continual alcoholic fermentation as the alcohol content generated decrease overtime in all concentrations except 1% gelatin encapsulated peel extract. Several treatments which produced the highest alcohol content were chosen to be distilled into bioethanol. Produced alcohol from sugar palm neera treated with 1% gelatin encapsulated peel extracts on day 7 exhibited the highest alcohol (84.99±7.22%) yield, which was significantly higher compared to control distilled on day 4 (14.65±1.58%). Therefore, the application of corn starch and gelatin-encapsulated rambutan peel ethyl-acetate extract were proven to be beneficial for neera farmers and bioethanol producers.

Item Type: Thesis (Bachelor)
Creators:
CreatorsNIMEmail
Taniman, Stevannie ChristieNIM03420120060UNSPECIFIED
Contributors:
ContributionContributorsNIDN/NIDKEmail
Thesis advisorPokatong, Wilbur Donald RaymondNIDN0002106402UNSPECIFIED
Uncontrolled Keywords: Alcoholic fermentation; bioethanol; fermentation inhibitor; rambutan peel; sugar palm neera
Subjects: T Technology > TP Chemical technology > TP368-456 Food processing and manufacture
Divisions: University Subject > Current > Faculty/School - UPH Karawaci > Faculty of Science and Technology > Food Technology
Current > Faculty/School - UPH Karawaci > Faculty of Science and Technology > Food Technology
Depositing User: Users 13 not found.
Date Deposited: 16 Oct 2018 07:41
Last Modified: 16 Oct 2020 03:18
URI: http://repository.uph.edu/id/eprint/1379

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