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All Journal Jurnal Kimia Terapan Indonesia Journal Serambi Engineering (JSE)
Herlian Eriska Putra
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Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology

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PENGARUH ELEKTROLISIS TERHADAP RENDEMEN MINYAK JARAK YANG DIHASILKAN PADA PROSES PEMBUATAN BIODIESEL Herlian Eriska Putra; Agusta Samodra Putra
Jurnal Kimia Terapan Indonesia Vol 13, No 2 (2011)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v13i2.154

Abstract

The use of jatropha oil as a source of raw material for making biodiesel is needed in order to decrease the production cost of biodiesel, since jatropha oil is categorized as non edible fat. In this research, the biodiesel production process by using an electrochemical reactor has been done. At the beginning of treatment, carried out the hydrolysis of oil by using HrS04 with acid and oil volume ratio is 1: 20. At follow-up treatment, carried out the decarboxylation via electrolysis. This process is done by varying the voltage of 0 V, 10 V,20 V,30 V,the variation of the concentration of 0.5 M acetic acid. 1 M, 1.5 M, as well as the distance between the electrodes in the reactor 5em and 10 em. From the experiments shown that electrolysis with voltage  parameters, acidic electrolyte solution. and electrode spacing affects the yield of decarboxylation process. Electrolysiswith 1.5 M acetic acid concentration and voltage of 30 volts per cent obtained the highest biodiesel yield of compound that is 70.432% in the reactor with inter-electrode distance of 5cm. While in the reactor with inter-electrode distance of 10 cm. thehighest yield was 53.372% by reacting the oil with 1.5 M acetic acid and voltage 30 Volt.Keywords : voltage, decarboxylation, electrolysis, acidconcentration, electrode distance, biodiesel.
Literatur Review : Sintesis Hidroksiapatit Dari Limbah Tulang Sapi Menggunakan Metode Hidrotermal Etih Hartati; Khoirunisa Ameilia Rahmawati; Djaenudin; Herlian Eriska Putra
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Indonesia is one of the countries with high beef consumption and production, resulting in large amounts of bone waste, especially rib bones, every year. This bone waste is generally not optimally utilized and has the potential to cause environmental problems. In fact, cow bones, including ribs, contain a high-value mineral compound called hydroxyapatite (Ca₁₀(PO₄)₆(OH)₂). Hydroxyapatite is an inorganic compound with a crystal structure and composition similar to human bone and tooth tissue, making it a highly potential material in the biomedical field, especially as a raw material for dentures, bone implants, and bone fillers. Through environmentally friendly technological approaches such as the hydrothermal method, bone waste can be processed to extract pure hydroxyapatite. This process involves heat and pressure treatment in a closed device that can remove organic components without damaging the mineral structure. The synthesized hydroxyapatite has a composition and crystal structure similar to human hard tissue, making it highly potential for use as a base material in medical applications, especially for dental prostheses.
Systematic Literature Review Penelitian Hydrothermal Cangkang Telur Ayam dengan Analisis Bibliometrik Menggunakan Software VOSviewer Agusty, Muhammad Naufal; Etih Hartati; Djaenudin; Herlian Eriska Putra
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Food waste management is a global challenge that encourages the application of the circular economy concept through resource reuse. Chicken eggshell waste has the potential to be used as a renewable source of calcium, while hydrothermal processing is a promising method for converting it into value-added products. This study aims to map the development of hydrothermal processing research on chicken eggshell waste through a bibliometric analysis of 75 Scopus-indexed publications from 2019 to 2024. The results of the analysis show that China is the country with the highest number of publications. Co-authorship analysis identified 27 collaborating authors, with Zhang, X., Yin, J., and Wang, I. as the main authors. The most dominant keywords were “hydroxyapatite,” “hydrothermal method,” and “calcium.” This study shows that hydrothermal research focuses on the development of calcium-based biomaterials and nanomaterials and opens up opportunities for further research on the sustainable use of chicken eggshell waste.
Co-Authors Agusta Samodra Putra Agusty, Muhammad Naufal Djaenudin Hartati, Etih Khoirunisa Ameilia Rahmawati