Tanambell, Hartono (2015) Application of semi-dried rambutan (nephelium lappaceum l.) peel and ethyl-acetic peel extract to coconut (cocos nucifera l.) sap to delay alcoholic fermentation for alcohol production. Bachelor thesis, Universitas Pelita Harapan.
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Abstract
Rambutan (Nephelium lappaceum L.) peels had been proven to possess inhibitory
effects toward the alcoholic fermentation of apple cider, cassava tapai, and sugar
palm sap. The aim of this research was to utilize rambutan peel and its ethyl
acetic extract to delay the fermentation occurring in coconut (Cocos nucifera L.)
sap for alcohol production. In the research stage I semi-dried peels with moisture
content ~40% were applied to coconut sap at concentrations of 35, 40, and 45%.
Whereas ethyl-acetic extracts of rambutan peel prepared by maceration method
were also applied to coconut sap at concentrations of 0.5, 1, 1.5, and 2%.
Samples were analyzed for pH, total titratable acidity, total dissolved solids, total
sugar, total reducing sugar, alcohol content, total yeast count, and total plate
count. Based on the results, six different treatments were chosen to be distilled
into alcohol, which were semi-dried 35% day 5, semi-dried 35% day 7, semi-dried
40% day 7, ethyl-acetic extract 0.5% day 5, ethyl-acetic extract 0.5% day 7, and
ethyl-acetic extract 0.5% day 7. The samples from the selected treatments had
alcohol content levels ranging from 3.04±0.05 to 4.23±0.18%, which is slightly
lower as compared to the control sap, which had 4.59±0.05% alcohol in day 4.
Samples from the selected treatments were then distilled into alcohol and
analyzed for distillation yield, alcohol content, alcohol yield, and total dissolved
solids. The result showed that samples that were added with ethyl-acetic extract of
rambutan peel produced better alcohol than samples that were added with semi
dried rambutan peel in terms of distillation yield, alcohol yield, and total
dissolved solid, but still slightly inferior as compared to alcohol distilled from
control sap in day 4 in terms of the same parameters. This delay would benefit
coconut sap farmers who intend to produce distilled liquor, spirit, or bioethanol
from coconut sap since there is an extended time of alcohol formation prior to
distillation process.
Item Type: | Thesis (Bachelor) |
---|---|
Creators: | Creators NIM Email ORCID Tanambell, Hartono NIM03420110058 HARTTANAMBELL@ROCKETMAIL.COM UNSPECIFIED |
Contributors: | Contribution Contributors NIDN/NIDK Email Thesis advisor Pokatong, Wilbur Donald Raymond NIDN0002106402 UNSPECIFIED Thesis advisor Halim, Yuniwaty NIDN0303068501 UNSPECIFIED |
Additional Information: | SK 34-11 TAN a |
Uncontrolled Keywords: | alcohol distillation ; alcoholic fermentation ; coconut sap ; fermentation inhibitor ; rambutan peel |
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 17 not found. |
Date Deposited: | 16 Oct 2018 08:03 |
Last Modified: | 02 Dec 2021 07:57 |
URI: | http://repository.uph.edu/id/eprint/1833 |