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All Journal Journal of Vocational Studies on Applied Research
Ichwan, Muhammad Maulana
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Engineering

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Virgin Coconut Oil: Enzymatic and Acidification Methods for Production – A Review Harun, Rizqi Fadhilah; Ichwan, Muhammad Maulana; Ardani, Raka; Kusumayanti, Heny
Journal of Vocational Studies on Applied Research Volume 6, Issue 2, Year 2024 (October 2024)
Publisher : Vocational College of Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jvsar.v6i2.22810

Abstract

Making Virgin Coconut Oil (VCO) was an important process in the coconut oil industry, which had potential for medical and beauty applications. This article discussed the method of making VCO using fermentation and enzymatic approaches. Making VCO involved several stages, including making coconut milk, adding ingredients such as pieces of young papaya, pineapple tubers, and yeast tape, and settling and separating the oil liquid. Adding papain and bromelain enzymes in the enzymatic process had been proven to increase the yield of coconut oil compared to fermentation methods without adding enzymes. Enzyme concentration and incubation time influenced the yield of VCO, with increasing enzyme concentration and optimal incubation time increasing oil production. This literature review provided insight into the potential of fermentation and enzymatic methods in VCO production, as well as provided a systematic framework for testing the effectiveness and quality of VCO produced through innovative approaches. The VCO manufacturing method using an enzymatic approach had the potential to increase coconut oil production yields and meet established quality standards.
The Role of Acid Catalysts in Optimizing Iron Adsorption: Mechanistic Insights and Applications Resi, Nadyn Amalia; Ichwan, Muhammad Maulana; Hapsari, Fatimah
Journal of Vocational Studies on Applied Research Volume 6, Issue 2, Year 2024 (October 2024)
Publisher : Vocational College of Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/jvsar.v6i2.25113

Abstract

This research aims to evaluate the influence of acid catalysts HCl and H2SO4, on the adsorption efficiency of Fe (Iron) using silica extracted from rice husk ash. The synthesis process employs the sol-gel method, including the initial treatment of rice husk ash, sodium silicate extraction, and the formation of silica gel with acid catalysts. The research results show that acid catalysts affect the structure and adsorption efficiency, with the highest efficiency obtained using 0.5M HCl catalyst with an adsorption efficiency of 62.3% and 0.5M H2SO4 catalyst with an adsorption efficiency of 24.85%. FTIR analysis to identify functional groups revealed siloxane (Si-O-Si) and silanol (Si-OH) contain on silica, which support the metal adsorption capability. The results of the morphological observation using SEM show that the amorphous silica structure has diverse pores based on the type of catalyst.
Co-Authors Ardani, Raka Hapsari, Fatimah Harun, Rizqi Fadhilah Heny Kusumayanti Resi, Nadyn Amalia