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All Journal Jurnal Sains Materi Indonesia Kinetika Chemical Engineering Journal Storage (CEJS) Innovative: Journal Of Social Science Research Asian Journal of Social and Humanities Journal Serambi Engineering (JSE)
Martha Aznury
Politeknik Negeri Sriwijaya
Humanities Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Public Health Other

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Pengaruh Variasi Enzim Lipase Amobil Terhadap Rasio Mol CPO: Metanol Pada Transesterifikasi Putri Dania, Elisabeth; Aznury, Martha
Jurnal Serambi Engineering Vol. 10 No. 4 (2025): Oktober 2025
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Biodiesel is a renewable and environmentally friendly alternative fuel that can be produced from vegetable oils such as Crude Palm Oil (CPO). This study aims to evaluate the effect of varying the mass of immobilized lipase enzyme (12–16 grams) and the molar ratio of CPO to methanol (1:4 and 1:6) on the quality of biodiesel produced through a transesterification process using a Packed Bed Reactor. The process stages include degumming, neutralization, and transesterification at a reaction temperature of 40°C for 6 hours. Immobilized lipase was chosen as the biocatalyst due to its ability to operate under mild conditions and produce high-quality biodiesel without generating harmful waste. The best result was achieved at a 1:4 molar ratio and 15 grams of enzyme, producing biodiesel with a density of 875.67 g/cm³, viscosity of 3.97 mm²/s, saponification value of 177.65 mg KOH/g, acid value of 0.32 mg KOH/g, iodine value of 48.05 g I₂/100 g, cetane number of 66.21, yield of 90.20%, and methyl ester content of 97.31%. All parameters met the Indonesian National Standard (SNI 7182:2015).
Pengoptimalan Pengolahan Air Pada Proses Koagulasi dengan Kombinasi Bahan Kimia Aluminium Sulfat dan Poly Aluminium Chloride PT. Tirta Sriwijaya Maju (Perseroda) Palembang Muhajir, Ahmad; Junaidi, Robert; Aznury, Martha
Innovative: Journal Of Social Science Research Vol. 4 No. 5 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i5.13359

Abstract

PT Tirta Sriwijaya Maju (TSM) is a clean water provider company operating in Palembang City. The TSM Water Treatment Plant (WTP) processes surface water from the Musi River with a total capacity of 230 liters/second. However, the TSM WTP is facing a shortage of clean water supply due to an increase in demand from new customers. This has led to a decrease in the duration of water flow to customers' homes. This problem is caused by 5% of the byproducts being sludge and wastewater, as well as the filter washing process that causes production to stop for 30 minutes three times a day. Therefore, this study aims to analyze the use of a combination of aluminum sulfate and poly aluminum chloride coagulants to reuse the sludge and minimize filter washing, in order to improve water treatment performance at the TSM WTP. The analysis results show that the alum and PAC dose ratio of 3:1 and 4:1 produced the highest turbidity reduction, which are 85.1% and 91.3%, as well as good floc formation. Thus, the use of this coagulant combination can be a solution to increase the productivity of the TSM WTP in providing sustainable clean water supply.
Analysis of the Independent and Sustainable Waste Recycling Center Program (PADU PADAN) from PT Pertamina EP Prabumulih Field CSR Rosadi, Hengky; Luthfi, Muhammad; Hendra Putra, Erwin; Wahyu Tomo, Almira Chairunissa; Saddam Husen, Mohammad; Aznury, Martha; Lestari, Sari; Marieska, Marieska; Ratna Sari, Dewi; Ripandi, Irfan
Asian Journal of Social and Humanities Vol. 2 No. 9 (2024): Asian Journal of Social and Humanities
Publisher : Pelopor Publikasi Akademika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59888/ajosh.v2i9.322

Abstract

The waste problem has become a disturbing problem in Prabumulih City. In Prabumulih City, there is over capacity at the Final Disposal Site. This is because the volume of waste coming in is very large and has not been managed well. The impact is very negative from an environmental, economic and social perspective. CSR PT Pertamina EP Prabumulih Field is participating in overcoming this through Program Pusat Daur Ulang Sampah Mandiri dan Berkelanjutan (PADU PADAN) as a community development (comdev) program. This research method is in the form of a qualitative field study or field research. The data collection techniques were carried out using observation with active participation, in-depth interviews, documentation and focus group discussions. The research results show: Program Pusat Daur Ulang Sampah Mandiri dan Berkelanjutan (PADU PADAN) program is an educational activity for sorting and processing organic and anorganic waste into marketable products. This program is under the auspices of the CSR of PT Pertamina EP Prabumulih Field in South Sumatra. Program Pusat Daur Ulang Sampah Mandiri dan Berkelanjutan (PADU PADAN) consists of two main programs, namely: 1) Perempuan Berdaya Bersama Kelola Sampah (MUDA BERSAMA), 2) Rumah Inovasi Daur Ulang Sampah Residu Anorganik (RINDU RESIK). The Muda Bersama Program specifically processes organic waste, while the Rindu Resik Program is a process for handling anorganic waste. These two programs have a positive impact on society both from an economic, social and environmental perspective.
Sintesis Gliserol Stearat Dari Gliserol Produk Industri Minyak Kelapa Sawit Untuk Proses Inhibitor Korosi Wijaya, Ariyanto Hadi; Aznury, Martha; Dewi, Erwana
Jurnal Serambi Engineering Vol. 11 No. 1 (2026): Januari 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

This study aims to synthesize glycerol stearate from palm oil industrial products and test its effectiveness as a corrosion inhibitor on aluminum metal. The synthesis was carried out through an esterification reaction between glycerol and stearic acid using a sulfuric acid catalyst at a temperature of 120°C with a reaction time variation of 120–220 minutes. The synthesized products were characterized using Thin Layer Chromatography (TLC) and Gas Chromatography–Mass Spectrometry (GC-MS) methods. The inhibitor effectiveness test was carried out using a gravimetric method based on the ASTM G31-21 standard in 1 M HCl solution. The results showed an optimum reaction time of 180 minutes with a yield of glycerol monostearate of 16.36%. TLC showed the highest Rf value close to the glycerol monostearate standard, while GC-MS detected the main compounds in the form of glycerol monopalmitate and glycerol monostearate. Effectiveness testing showed that the coating method produced an inhibition efficiency of 76.89%, higher than the direct mixing method of 73.69%. These results indicate that glycerol stearate has the potential to be an effective and environmentally friendly corrosion inhibitor based on biodiesel waste.
PENGARUH PENAMBAHAN KOH TERHADAP SIFAT KATALITIK KATALIS CaO DARI BATU KAPUR Zamhari, Mustain; Rahma, Aulya; Aznury, Martha
Chemical Engineering Journal Storage (CEJS) Vol. 5 No. 06 (2025): Chemical Engineering Journal Storage (CEJS)-December 2025
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v5i06.24179

Abstract

Penelitian ini bertujuan untuk meningkatkan sifat basa serta karakteristik katalitiknya, yang berperan penting dalam mempercepat reaksi kimia tanpa ikut bereaksi secara permanen. Proses sintesis katalis melibatkan tahap impregnasi dan kalsinasi dengan memvariasikan konsentrasi KOH (1%–1,4% w/v) serta waktu kalsinasi (1–2 jam) guna mengoptimalkan aktivitas katalis. Katalis diuji menggunakan titrasi asam basa, X-ray Fluorescence (XRF), (BET) dan (SEM). Hasil terbaik diperoleh pada sampel A3B4 dengan konsentrasi KOH 1,3% dan waktu kalsinasi 2 jam, dengan kebasaan 3,75 mmol/gr, kadar K2O 2,10%, luas permukaan 8,523 m²/g dengan struktur berpori dengan rongga yang berperan penting dalam meningkatkan luas permukaan aktif katalis sehingga mempermudah interaksi antara molekul reaktan selama proses transesterifikasi. Evaluasi terhadap performa katalis dilakukan melalui pengujian pada reaksi transesterifikasi untuk produksi biodiesel yang menghasilkan konversi metil ester hingga 95,60%. Hasil penelitian ini membuktikan bahwa sintesis katalis heterogen berbasis CaO yang dimodifikasi dengan impregnasi KOH merupakan metode yang efektif, ditunjukkan oleh peningkatan sifat kebasaan dan aktivitas katalitiknya dalam proses transesterifikasi.
EKSTRAKSI SILIKA GEL DARI GEOTHERMAL BRINE PLTP LUMUT BALAI MENGGUNAKAN METODE PRESIPITASI KIMIA (SOL-GEL) PADA WAKTU REAKSI TETAP Illahi, Satria Ridho; Aznury, Martha; Puspa, Dilia; Ramadhan, Akbar; Yunanto, Isnandar; Chodijah, Siti
Chemical Engineering Journal Storage (CEJS) Vol. 5 No. 06 (2025): Chemical Engineering Journal Storage (CEJS)-December 2025
Publisher : LPPM Universitas Malikussaleh

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/cejs.v5i06.24321

Abstract

Geothermal brine merupakan limbah cair dari pembangkit listrik tenaga panas bumi yang mengandung silika dalam jumlah tinggi. Kandungan silika ini berpotensi dimanfaatkan sebagai bahan baku silika gel bernilai ekonomi. Penelitian ini bertujuan untuk mengekstraksi silika gel dari geothermal brine PLTP Lumut Balai menggunakan metode presipitasi kimia (sol-gel) dengan waktu reaksi tetap 30 menit. Proses diawali dengan penambahan larutan NaOH pada konsentrasi 1,25%, 1,50%, 1,75%, dan 2,00% untuk melarutkan silika menjadi natrium silikat, diikuti dengan penambahan HCl hingga terbentuk gel. Produk dikeringkan dan dikarakterisasi meliputi kadar air, kapasitas adsorpsi air, pH, dan komposisi kimia. Hasil terbaik diperoleh pada konsentrasi 2,00% dengan kadar air 1,33%, kapasitas adsorpsi air 25,4%, pH netral (6), dan kandungan SiO₂ sebesar 89,57%. Metode sol-gel terbukti efektif dalam mengekstraksi silika gel dari limbah geothermal brine.
Co-Authors ., Sofiah ., Yuniar Abu Hasan Ahmad Muhajir, Ahmad Elfrida Ratnawati Erwana Dewi Fadarina Fiyansah, Toni Okta H.C, Fadarina Hendra Putra, Erwin Ibnu Hajar Illahi, Satria Ridho Indah Purnamasari Marieska, Marieska Mawarni, Tri Muhammad Luthfi Mustain Zamhari Nurjanah, Rizki Puspa, Dilia Putri Dania, Elisabeth Rahma, Aulya Rahmaniar Rahmaniar, Rahmaniar Ramadhan, Akbar RATNA SARI, DEWI Resky, Resky Ripandi, Irfan Robert Junaidi Rosadi, Hengky Saddam Husen, Mohammad Sari, Rezki Prima Serlina, Ayu Siti Chodijah Syamsiar, Syamsiar Wahyu Tomo, Almira Chairunissa Wijaya, Ariyanto Hadi Yunanto, Isnandar Zaman, Muhammad