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COMPARATIVE EVALUATION OF HOMOGENEOUS AND HETEROGENOUS CATALYSTS IN THE ESTERIFICATION OF WASTE COOKING OIL Ambarwati, Septiana; Hutapea, Henny Parida; Banuwati, Ameilia Wahyu; Fuadah, Fani
Proceeding of the International Conference Health, Science And Technology (ICOHETECH) 2025: Proceeding of the 6th International Conference Health, Science And Technology (ICOHETECH)
Publisher : LPPM Universitas Duta Bangsa Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47701/sdbf9d88

Abstract

Waste cooking oil is a potential raw material for biodiesel production, yet its reuse poses health and environmental risks due to the presence of carcinogenic compounds and high peroxide values. This study aimed to convert waste cooking oil into biodiesel through the transesterification process using different catalysts—acid (HCl), base (NaOH), and heterogeneous (MgO)—combined with pretreatment methods (untreated, bleaching earth, and banana peel adsorption). The reactions were carried out using ethanol as alcohol, followed by homogenization, heating at 60°C for 1 hour, and settling for 24 hours. The results showed that HCl produced the highest biodiesel yield (up to 3.1792 with bleaching earth treatment), followed by MgO and NaOH. Glycerol was obtained as the main by-product, with the highest values also associated with HCl catalysis. Residues were only formed in reactions involving NaOH and MgO due to their heterogeneous and insoluble nature, whereas no residue was found in HCl-based reactions. Pretreatment with bleaching earth significantly improved biodiesel yield compared to banana peel or untreated samples. In conclusion, acid-catalyzed transesterification of pretreated waste cooking oil, particularly with bleaching earth treatment, provides the most effective route for biodiesel production while also generating glycerol as a valuable by-product.
Desa Bebas Plastik: Inovasi Pengolahan Limbah Plastik dalam Membangun Kesadaran dan Kemandirian Masyarakat PKK Desa Ngringo untuk Lingkungan Berkelanjutan Ambarwati, Septiana; Parida Hutapea, Henny; Wahyu Banuwati, Ameilia; Fuadah, Fani
Transformasi Masyarakat : Jurnal Inovasi Sosial dan Pengabdian Vol. 3 No. 1 (2026): Januari: Transformasi Masyarakat : Jurnal Inovasi Sosial dan Pengabdian
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/transformasi.v3i1.2951

Abstract

The increasing consumption of plastic, particularly single-use packaging, has led to a significant rise in household plastic waste, which poses a potential threat to environmental sustainability. One type of waste that remains underutilized is metallic plastic packaging. This Community Service activity aimed to enhance community knowledge and skills in processing metallic plastic packaging waste into handicraft products with functional value and economic potential. The activity was conducted in collaboration with the Family Welfare and Empowerment Group (PKK) of Ngringo Village, Karanganyar, involving 15 participants. The methods employed included a preliminary survey, educational outreach, hands-on practical training, and continuous mentoring. The effectiveness of the program was evaluated using pre-test and post-test assessments analyzed through the normalized gain (N-gain) method. The results demonstrated an improvement in participants’ knowledge and skills following the training, with an average N-gain value of 0.68, which falls within the moderate-to-high category. These findings indicate that the metallic plastic packaging waste processing training was effective in enhancing community capacity. Furthermore, the activity not only contributed to reducing plastic waste generation but also promoted the implementation of circular economy principles.