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All Journal Briliant: Jurnal Riset dan Konseptual Jambura Journal of Electrical and Electronics Engineering Majalah Teknik Industri Jurnal Teknik Kimia
Isran Asnawi
Politeknik Industri Logam Morowali
Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Konversi Gliserol (Hasil Samping Proses Biodiesel) menjadi Akrolein dengan Metode Gelombang Ultrasonik Isran Asnawi; Ruslan Kalla; Rismawati Rasyid
Majalah Teknik Industri Vol 29 No 2 (2021): Majalah Teknik Industri Desember 2021
Publisher : Unit Penelitian dan Pengabdian Masyarakat (UPPM) Politeknik ATI Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Proses biodiesel menghasilkan limbah berupa crude gliserol. Crude gliserol tersebut merupakan peluang untuk dikembangkan menjadi produk gliserol komersil melalui proses pemurnian. Gliserol ini kemudian dapat dikonversi menjadi produk lain yang bernilai tambah, salah satunya adalah akrolein. Mengingat tingginya permintaan akrolein di Indonesia, maka pada penelitian ini bertujuan untuk mengonversi gliserol menjadi akrolein menggunakan metode gelombang ultrasonik dari bahan baku limbah biodiesel. Limbah biodiesel yaitu crude gliserol terlebih dahulu dimurnikan dengan metode pengasaman, adsorpsi, dan penguapan. Hasil pemurnian kemudian dilanjutkan pada proses konversi menjadi produk akrolein dan dilakukan analisa konversi gliserol dan analisa yield akrolein. Pemurnian tersebut menghasilkan gliserol dengan kadar 86,15%. Gliserol tersebut kemudian dikonversi menjadi akrolein menggunakan gelombang ultrasonik dengan parameter proses adalah massa gliserol-air 1:8, katalis H2SO4 1%, waktu proses 20-40 menit, dan suhu 30-60 oC. Hasil parameter proses terbaik diperoleh pada kondisi suhu 60 oC dan waktu sonikasi 40 menit dengan perolehan nilai konversi sebesar 50,69% dan yield akrolein sebesar 11,3%.
EVALUASI PROSES FILTRASI PADA ALAT VERTICAL PRESSURE FILTER HIDROLIK UNTUK PEMISAHAN PADAT-CAIR EKTRAK NIKEL Isran Asnawi; Maichel Sampeangin; Eriek Aristya Pradana Putra; Moh. Afandy; Hendi Lilih Wijayanto
Jurnal Teknik Kimia Vol. 20 No. 2 (2025): JURNAL TEKNIK KIMIA
Publisher : Program Studi Teknik Kimia, Universitas Pembangunan Nasional Veteran Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/jurnaltekkim.v20i2.57

Abstract

Proses filtrasi merupakan salah satu tahapan krusial pada proses perolehan nikel murni dari proses pelindian. Sebagai upaya untuk meningkatkan efisiensi filtrasi proses pelindian bijih ore nikel laterit, maka dibuat alat vertical pressure filter berbasis hidrolik. Alat tersebut menghasilkan nilai efisiensi filtrat yang cukup rendah sehingga mendorong dilakukan penelitian lanjut untuk mengevaluasi proses filtrasi yang berlangsung. Penelitian ini bertujuan untuk mengevaluasi proses filtrasi pada alat vertical pressure filter hidrolik menggunakan cairan ekstrak nikel melalui perhitungan nilai α (tahanan spesifik cake), Rm (tahanan filter media), % ε filtrat, dan % ε residu. Eksperimen filtrasi dilangsungkan menggunakan alat tersebut dengan sampel yang difiltrasi yaitu cairan ekstrak nikel hasil pelindian. Variabel yang digunakan yaitu konsentrasi cairan ekstrak nikel (1-4% W/V), dan variasi ukuran filter (nylon 350 mesh dan 450 mesh) yang dilanjutkan perhitungan nilai α dan Rm, nilai % ε filtrat, dan % ε residu. Hasil penelitian menunjukkan penggunaan konsentrasi ekstrak nikel 4% dan pemilihan media filter nylon 350 mesh dapat diterapkan untuk filtrasi menggunakan alat vertical pressure filter hidrolik karena diperoleh nilai α dan Rm yang paling rendah. Efisiensi filtrasi menunjukkan nilai % efisiensi filtrat yang rendah dan nilai % efisiensi residu yang tinggi.
Design and Performance Evaluation of a PWM-Controlled Vertical Pressure Filter for Solid–Liquid Separation of Nickel Laterite Slurry Moh . Afandy; Isran Asnawi; Hendi Lilih Wijayanto; Eriek Aristya Perdana; Muhammad Ikbal Rianto; Fathurrasuli Fathurrasuli
Jambura Journal of Electrical and Electronics Engineering Vol 8, No 2 (2026): Juli - Desember 2026
Publisher : Electrical Engineering Department Faculty of Engineering State University of Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37905/jjeee.v8i2.36783

Abstract

This study presents the design results of a Vertical Pressure Filter based on Pulse Width Modulation (PWM) using a linear actuator for the separation process of nickel laterite slurry. The development of this system is motivated by the limitations of conventional filtration systems that still use fixed pressure and are less flexible in regulating filtration pressure. The research method used is Design and Development (DD), which includes the design of mechanical and electronic systems, development of PWM control circuits, prototype realization, and system performance testing. Tests were carried out on variations of PWM duty cycles of 20%, 40%, 60%, 80%, and 100% to evaluate the actuator response and filtration performance. The results show that increasing the PWM duty cycle increases the actuator speed and vertical pressure in the filtration chamber. The duty cycle range of 20%–40% provides a more stable actuator response with low vibration and is suitable for the nickel laterite slurry filtration process. In addition, the system was able to produce a filtrate efficiency of 3.76% and a residue efficiency of 76.7%, which indicates the ability to form a filter cake and retain solids in the filtration media. The results of the study indicate that the PWM-based Vertical Pressure Filter has the potential as an adaptive, simple, and flexible filtration system for laboratory and pilot plant applications in nickel laterite processing.
RANCANG BANGUN ALAT KOLOM GELEMBUNG PANCARAN (JET BUBBLE COLUMN) UNTUK PENGURANGAN KADAR LOGAM BERAT LIMBAH CAIR INDUSTRI Isran Asnawi; Hendi Lilih Wijayanto; Muhammad Alfian; Dewi Purnamasari
BRILIANT: Jurnal Riset dan Konseptual Vol 11 No 3 (2026): Volume 11 Nomor 3, Agustus 2026
Publisher : Universitas Nahdlatul Ulama Blitar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28926/briliant.v11i3.2376

Abstract

A jet bubble column is a reactor used in various process fields that functions to produce a strong liquid flow and expand the contact area between gases, liquids, and solids. However, research studies on the application of jet bubble columns for industrial wastewater treatment processes are still relatively limited. This study aims to modify the jet bubble column so that it can reduce the levels of heavy metals in industrial liquid waste. The tool is modified by adding granular adsorbents to the inside of the column which are held on a perforated plate holder. The tools and materials used include 5-inch PVC pipes, ½-inch PVC pipes, pipe fittings, pipe caps, hollow iron, DC pumps, valves, and brass nozzles. The jet bubble column tool has a fluid volume capacity of 5 L, a jet pump with a maximum pressure of 90 bar, a fluid flow rate of 7 L/minute, and a process time of 30 minutes. The test results show that the jet bubble column is able to reduce the levels of hexavalent heavy metals in industrial liquid waste by up to 83.67% with a contact time of 30 minutes. This shows better performance compared to the use of commonly used mechanical stirring.
Co-Authors Dewi Purnamasari Eriek Aristya Perdana Eriek Aristya Pradana Putra Fathurrasuli Fathurrasuli Hendi Lilih Wijayanto Hendi Lilih Wijayanto Maichel Sampeangin Moh . Afandy Moh. Afandy Muhammad Alfian Muhammad Ikbal Rianto Rismawati Rasyid Ruslan Kalla