Solid state fermentation of okara using rhizopus oligosporus

Wie, Felicia (2018) Solid state fermentation of okara using rhizopus oligosporus. Bachelor thesis, Universitas Pelita Harapan.

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Abstract

Water extraction from soybean during soymilk and tofu production produce a by-product known as okara. Protein in okara can be considered as source of bioactive peptides that have antioxidant. However, this parent proteins have to be hydrolyzed using protease from microorganisms in solid state fermentation. R. oligosporus is a mold that usually used for making tempeh and is known to have proteolytic activity. The aim of this research was to find the optimum condition of okara fermented with R. oligosporus in different fermentation times (24, 48, 72, 96, and 120 hours), R. oligosporus initial concentrations (1.04×10-3, 1.95×10-3, 2.44×10-3 gDCW/gokara), and water activity values (0.913 and 0.931). The optimum condition was selected based on highest antioxidant activity. The results showed that the highest antioxidant activity was 46.28% at 5000 ppm with degree of hydrolysis was 17.80% with 5 days fermentation, initial inoculum concentration of 1.04×10-3 gDCW/gokara, and water activity (aw) of 0.931. The increasing of antioxidant activity was caused by the increasing of cysteine, as it was the amino acid that known to have antioxidant activity. Essential amino acids such as lysine, methionine, and tryptophan were also increased after undergone solid state fermentation using R. oligosporus.

Item Type: Thesis (Bachelor)
Creators:
CreatorsNIMEmail
Wie, FeliciaNIM00000008287FELICIA_WIE@YAHOO.CO.ID
Contributors:
ContributionContributorsNIDN/NIDKEmail
Thesis advisorSitanggang, Azis BoingNIDN9903021605UNSPECIFIED
Thesis advisorSinaga, Wenny Silvia LorenNIDN0314108701UNSPECIFIED
Uncontrolled Keywords: antioxidant activity; okara; rhizopus oligosporus; solid state fermentation
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: Mr Samuel Noya
Date Deposited: 24 Jun 2020 05:46
Last Modified: 14 Jul 2020 07:56
URI: http://repository.uph.edu/id/eprint/8928

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