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All Journal Reaktor GEMA TEKNOLOGI METANA Prosiding Seminar Nasional Sains Dan Teknologi Fakultas Teknik Waste Technology Jurnal Keteknikan Pertanian Tropis dan Biosistem Jurnal Pengabdian Vokasi Journal of Vocational Studies on Applied Research

Heny Kusumayanti

Departemen Teknologi Dan Industri, Sekolah Vokasi, Universitas Diponegoro

Author-ID : 303499

Agriculture, Biological Sciences & Forestry Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Other

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The Effect of Rotational Speed of Homogenization on Emulsion Results Obtained Using Soy Lecithin Emulsifier Zahra Rahma Namira; Vita Paramita; Heny Kusumayanti
Journal of Vocational Studies on Applied Research Volume 3, Issue 1, Year 2021 (April 2021)
Publisher : Sekolah Vokasi Universitas Diponegoro

Homogenization is the process of homogenizing particle size in an effort to maintain the stability of a mixture formed from 2 phases that cannot be fused or commonly called emulsions. This study aims to analyze the effect of homogenization speed and differences in solid concentration in homogenization process using homogenizer. The ingredients used are Virgin Coconut Oil as a solute, Aquadest as a solvent, and soy lecithin as an emulsifier. Several stages of analysis are density, viscosity, microscopic, and emulsion stability analysis. The results obtained from this study were optimum stirring speed of 22,000 rpm with optimum homogenization time of 4 minutes, solid concentration of 60% obtaining density of 0.78 gr/mL, viscosity of 5.86 cP, stability of 100%, and most stable microscope test. The results showed that the greater the stirring speed and time, the smaller the density and viscosity value produced and the greater the stability value obtained. The greater the concentration of solids, the greater the density, viscosity, and stability of the emulsion.

Optimization of Oil and Methanol Ratio, Time, and Reaction Temperature of Biodiesel Making from Kemiri Sunan Oil (Trisperma Oil Reuteals) with Two Stage Transesterification Zahra Aumy Pranita; Vita Paramita; Rizka Amalia; Heny Kusumayanti
Journal of Vocational Studies on Applied Research Volume 2, Issue 2, Year 2020 (October 2020)
Publisher : Sekolah Vokasi Universitas Diponegoro

Abstract - Biodiesel is an alternative fuel which is generally produced from the transesterification process between vegetable oil and methanol, ethanol, or butanol with the help of a catalyst which aims to speed up the reaction. The raw material for making biodiesel, namely renewable vegetable oil, also sees Indonesia as a tropical country so that biodiesel can be produced on a large scale and is environmentally friendly. Vegetable oil can be classified into two, namely edible oil (food) and non edible oil (non-food). The research was conducted using non-edible vegetable oil, namely kemiri sunan oil, which was carried out using a two-stage transesterification method. This research was conducted to determine the optimization of the ratio of oil and methanol (1: 4; 1: 5; 1: 6), temperature (55⁰C, 60⁰C, 65⁰C) and reaction time (15 minutes, 30 minutes, 45 minutes) in making biodiesel from kemiri sunan oil, where the experimental results obtained the highest yield value of 82.79%. In the experiment, analysis of density, viscosity, moisture content and cetane number was also carried out. The results showed that the viscosity and cetane number obtained did not meet SNI for biodiesel.

The Optimization of Addition of Bromelain Enzyme Catalyst on the Fermentation of Coconut Milk to VCO (Virgin Coconut Oil) Using Tempeh Yeast Itta Rahmalia; Heny Kusumayanti
Journal of Vocational Studies on Applied Research Volume 3, Issue 2, Year 2021 (October 2021)
Publisher : Sekolah Vokasi Universitas Diponegoro

Coconut (Cocos nucifera) is one of the most abundant tropical plants in Indonesia. It is proven that in 2020 the total area of coconut plantations in Indonesia reached 3,377,376 hectares. Virgin Coconut Oil (VCO) is one of the diversified coconut products with high commercial value. In this study, the production of Virgin Coconut Oil (VCO) was carried out by fermenting tempeh yeast and with the help of the bromelain enzyme as a catalyst. This is because the bromelain enzyme is a type of protease enzyme that acts as a protein breaker in the oil contained in the coconut milk emulsion. Research has shown that the concentration of the bromelain enzyme affects the yield of VCO. Virgin Coconut Oil (VCO) with the addition of 6 grams of bromelain enzyme, 30 hours of fermentation time, and the use of 2 grams of tempeh yeast resulted in the highest yield value of 9.2% and free fatty acids (FFA) of 0.21%. This is because the higher the bromelain enzyme concentration, the more it will bind to protein as a substrate. In addition, the longer the fermentation, the more hydrolysis that occurs in the oil, so that the fermentation time also affects the concentration of free fatty acids of VCO. Analysis of fatty acid content was carried out using the GCMS method and showed that the highest fatty acid content was lauric acid at 54.27%. While the physical characterization of the resulting VCO is in accordance with SNI 7381:2018, which has a distinctive smell of coconut aroma, a distinctive taste of coconut oil, and is colorless.

Co-Authors Afiyatun Inayah Agus Purwanto AGUS PURWANTO Ahmad, Laila Faizah Amalia Pritayanti Aprilina Purbasari Ariestya Meta Devi Arkhan Subari B Budiyono Basa Ulina br Simalango Budiono Budiono Budiyono Budiyono Darmaji, Timothius Adrian Christantyo Dessy Ariyanti Dessy Ariyanti Didik Wisnu Widjajanto Dina Elvia Rani Dwi Handayani Elin Siswati Fahmi Arifan Falaah, Miftakhu Fathurrahman, Hanif Muhammad Ginting, Sofiani Br Hanindito, Satrio Bagus Herlani Siti Hidayanti Herry Santosa Heru Susanto Ida Hayu Dwimawanti Iman Setiono Isti Pudjihastuti Itta Rahmalia Karismawan P U Laila Faizah Achmad, Laila Faizah Laila Faizah, Laila Lulluil Mahsunnah Mahendrajaya, Robertus Triaji Maranatha Sembiring Margaretha Tuti Susanti Mohamad Endy Y Yulianto Mubin, Nurul Ni Putu Adeyani Noer Abyor Handayani Nurul Pudiastutiningtyas Nurul Pudiastutiningtyas Nurul Pudiastutiningtyas, Nurul Nurul Puspitasari Pangi Pangi Pudiastuningtyas, Nurul R TD. Wisnu Broto, R TD. Wisnu R.TD Wisnu Broto Reny Yesiana Rizka Amalia Rizka Amalia RTD. Wisnu Broto Safitri, Laras Intan Sary, Cindy Nella Setiawati, FS Nugraheni Siregar, Vynda Dindasari Sri Rejeki Thoyib Hanifan Syuhada Titik Istirokhatun Tri Murti Nila W Vita Paramita Vita Paramita Vynda Dindasari Siregar Wahyunimgsih, Wahyunimgsih Wahyuningsih Wahyuningsih Wahyuningsih Wahyuningsih Wahyuningsih Wahyuningsih Wahyuningsih Wahyuningsih Widi Astuti Windyandari, Aulia Windyandari Yudanto, Yusuf Arya Yusim, Adi Kurniawan Zahra Aumy Pranita Zahra Rahma Namira Zulfaidah Aryani

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