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All Journal Reaktor Abdimas Indonesian Journal of Chemistry CARADDE: Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Cendekia Eksakta Edunesia : jurnal Ilmiah Pendidikan Dedikasi: Jurnal Pengabdian kepada Masyarakat Journal of Educational Sciences Journal of Innovation and Research in Primary Education Bookchapter Alam Universitas Negeri Semarang Journal of Community Empowerment Jurnal Bahan Alam Terbarukan
Harianingsih, Harianingsih
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Religion Agriculture, Biological Sciences & Forestry Arts Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Education Energy Engineering Environmental Science Languange, Linguistic, Communication & Media Library & Information Science Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Social Sciences Other

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Journal : reaktor

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Optimization of Rice Bran Oil Bleaching via Carotenoid Adsorption onto Activated Carbon using Response Surface Methodology (RSM) Damayanti, Astrilia -; Harianingsih, Harianingsih; Bahlawan, zuhriyan Ash Shiddieqy; Dillah, Shohib Qomad; Dewi, Yasinda Verrel Dinara Shinka; Kristi, Silvia Yolanda; Prasetyo, Ridwan Anung
Reaktor Volume 23 No.2 August 2023
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.23.2.53-61

Abstract

Rice bran oil (RBO) is a by-product of rice processing with a good fatty acid profile and high oxidative stability. This study aims to optimize the bleaching stage of the rice bran oil refining process to determine the minimum levels of carotenoids in RBO by using the Response Surface Methodology (RSM). This research used the Central Composite Design (CCD) experimental design with three variables: bleaching temperature (50, 80, 1100C), bleaching time (20, 40, 60 minutes), and activated carbon concentration (0.4, 0.8, 1.2%). As a result, the model was enhanced to explain the correlation of each variable and the different data variations. This study employed the Derringer method to determine the most optimal variable variation that produces the lowest carotene levels. This study found that the optimal carotene level was 4.87 mg/kg with an activated carbon concentration of 1.18%, temperature of 500C, and time of 53.155 minutes.
The Effect of Air Injection for Formation of Radicals in Liquid Glow Discharge Plasma Electrolysis with K2SO4 Solution Harianingsih, Harianingsih; Rengga, Woro Dyah Pita; Kusumaningrum, Maharani; Imani, Nadya Alfa Cahaya; Saksono, Nelson; Zakaria, Zainal
Reaktor Volume 23 No.2 August 2023
Publisher : Department of Chemical Engineering, Faculty of Engineering, Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/reaktor.23.2.37-43

Abstract

Glow discharge is part of the phenomenon of plasma formation on the electrode side in contact with the electrolyte solution and begins with an electrolysis reaction with direct electric current. In this research, 0.02 M K2SO4 electrolyte was used, the anode in the form of tungsten and stainless steel for the cathode in a direct current plasma electrolysis reactor. The phenomenon of plasma formation is explained using a strong current and voltage characteristic curve. There are three plasma formation zones: the ohmic zone, the transition zone and the glow discharge plasma zone. Air injection affects the formation of glow discharge plasma and radicals. Without the injection of air, radicals formed only •OH, •H and •O with emission intensities of 20012 a.u, 10121 a.u and 10245 a.u. Air injection 0.8 L men-1 produced radicals •OH, •N, •N2*, •N2+, •H and •O with emission intensities of 30863a.u, 20139 a.u, 28540 a.u, 18023 a.u, 12547 a.u and 49800 a.u. Many radicals are generated when the plasma reaches stability. The plasma is dominated by H2O ionization, and the plasma is more stable if formed in the gas phase. Other results from this research at 0 L men-1, 0.2 L men-1, 0.4 L men-1 and 0.8 L men-1 stable plasma were formed at 675 V, 660 V, 650 V and 650 V. The plasma that can be seen from the bright light, the injection of air accelerates the formation of a gas envelope to reduce energy.
Co-Authors Afidah, Asti Dwi Afifah Ritmadanti Akhilia, Tudrika Astrilia Damayanti Atik Yuliyani Bahlawan, Zuhriyan Ash Shiddieqy Bambang Subali Bambang Sugiyarto, Bambang Bunyamin Bunyamin Catur Rini Widyastuti, Catur Rini Decky Avrilianda Dewi, Yasinda Verrel Dinara Shinka Dillah, Shohib Qomad Durroh, Lum’Atud Eka Titi Andaryani Ellianawati, Ellianawati Erliana, Savira Rinda Feronika, Shela Intan Firmansyah, Fariq Hammam Ginanjar, Bagus Handayani, Sri Hidayati, Wiwik Imani, Nadya Alfa Cahaya Indra Sakti Pangestu Indriawan, Ari Nur Dwi Isnina Noor Ubay Kristanto, Virgiawan Adi Kristi, Silvia Yolanda Kristianto, Virgiawan Adi Kurniasari, Winda Maharani Kusumaningrum Muhaimin, Yusril Yahya Mu’arifuddin, Mu’arifuddin Nelson Saksono Nuni Widiarti Nur Qudus Nur'aeni, Amellia Putri Nurrahman, Ahmad Rickyansyah Pangestu, Indra Sakti Prasetyo, Ridwan Anung Prima Astuti Handayani Putra, Muhammad Rizky Fahrizal Puzi, Asmarani Ahmad Retno Wulandari Riski, Via Savira Rinda Erliana Setiadi, Rizki Siswoyo, Mohammad Pujo Sokmawan, Muhammad Rafi Hanairo Sri Handayani SRI RAHAYU Sri Sumartiningsih SRI WARDANI Sudarmin Sudarmin Sulistyawan, Vera Noviana Sumbali, Bambang Tri Joko Raharjo Ubay, Isnina Noor Vera Noviana Sulistyawan Wara Dyah Pita Rengga Widi Astuti Widiati, Nuni Yeri Sutopo Zakaria, Zainal