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Fathoni, Rif'an
Department Of Chemical Engineering, Engineering Faculty, Mulawarman University
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Biodiesel Production from Palm Oil with Heterogeneous Catalysts Jonathan; Rumpaisum, Samuel Gidan; Fathoni, Rif’an
Journal of Green Chemical and Environmental Engineering Vol. 1 No. 1 (2025): Journal of Green Chemical and Environmental Engineering
Publisher : Candela Edutech Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.63288/jgcee.v1i1.4

Abstract

Rice production in East Kalimantan Province during 2023 reached around 215,290 tons/year of milled dry grain. Rice is one of the main agricultural products that produce waste in the form of rice husks. Rice husk is stillNot well utilized so that it only becomes a pile of agricultural waste. Rice husk ash contains compounds that can be used as catalyst support, including SiO2. This study aims to determine the effect of rice husk ash catalyst from the KOH impregnation method as a catalyst for making biodiesel from conventional palm oil. Transesterification was conducted on palm oil with the ratio of catalyst mass to oil volume (10%, 15%, 20%). Biodiesel production from palm oil using KOH impregnated catalyst with 2N concentration and 20% catalyst concentration produced the highest yield of 86.3%. Viscosity and density of the results obtained meet the standards.
Biodecolorization of Azo Dye using Trametes sp. UM 12 Isolated from East Kalimantan Wulandari, Retno; Mitha, Mitha; Kahar, Abdul; Heryadi, Eko; Fahmi, Muhammad; Fathoni, Rif'an; Firyaal, Rosa Assyifa; Rangga, Wahyudi
International Journal of Engineering, Science and Information Technology Vol 6, No 1 (2026)
Publisher : Malikussaleh University, Aceh, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52088/ijesty.v6i1.1777

Abstract

The textile industry releases substantial amounts of azo dyes, including Reactive Black 5 (RB5), which persist in the environment due to their stable chemical structures and toxic properties. White-rot fungi-based biological treatment serves as an environmentally friendly and affordable method for removing dyes from water through the production of ligninolytic enzymes, including laccases. The research assesses Trametes sp. UM 12's decolourisation ability compared to Phanerochaete chrysosporium for RB 5 decolourisation efficiency. The research examined the effects of pH, temperature, agitation speed, and initial RB5 concentration on fungal decolourisation. The optimal removal of Trametes sp. was achieved at pH 5 and 30–35°C with 150 rpm agitation, resulting in more than 95% colour removal within 48–72 hours, and it reached 99.7% decolourization after 96 hours at 100 mg/L RB5. The process removed 98.7% and 96.8% of the dye at 100 mg/L and 250 mg/L after 120 hours, but only 52.1% and 31.8% at 500 mg/L and 1000 mg/L, respectively. The process shows substrate inhibition and enzyme saturation at high pollutant concentrations. The research shows Trametes sp. UM 12 outstanding performance, making it suitable for treating wastewater in tropical environments. 
Co-Authors Abdul Kahar Agatha Permatasari Mayang Agus Anggriawan Ahmad Moh. Nur Anton Irawan Ardiah, Rida Ari badin Ari Susandy Sanjaya, Ari Susandy Ariyani Ariyani Dermawan, Rizki Kurnia Diaz Galuh Purwitasari Eka R. P. eko heryadi, eko Febbi Zulfania Firyaal, Rosa Assyifa Hairul Huda Indah Wahyuni Jonathan Lutfi Nurohmah M. Yanggi Atwanda Mardiah Mardiah Mitha Mitha, Mitha MUHAMMAD FAHMI Mulyani, Nunuk Nitami, Dwi Arum Nurhazizah Lubis P Purwanto Paradila Apriliani Wulandari Pratikawati, Hesiany Febby Putri A. R. Rahma Tussania Rangga, Wahyudi Renanto Handogo Reni Puspita Sari Retno Wulandari Rifaido Herlan Rizka Marlina Rizki Kurnia Dermawan Rumpaisum, Samuel Gidan Simanjuntak, M. Adika Fatturahman Siti A'isyah Supi, Supiansyah Tantra Diwa Larasati Tantra Diwa Larasati Totok Ruki Biyanto Vyra Kredha Nagari Yazid Bindar Zahratunnisa, Zahratunnisa