The increasing world population, rapid industrialization, urbanization, and economic growth have led to a continuous increase in the consumption of fossil fuels to meet the ever-increasing demand for energy. Continuous emissions from burning fossil fuels will create a need to find appropriate and sustainable substitutes for fossil fuels. Biodiesel is the right alternative solution for diesel engines because it is renewable, non-toxic, and environmentally friendly. Waste cooking oil (WCO) from the food, non-food, restaurant, and household sectors is produced on a large scale in every country and can contribute to environmental pollution if proper disposal systems are not applied. Instead of throwing it landfills Environmental pollution can be minimized by recycling WCO. This study evaluates the potential of using WCO to produce biodiesel using zeolite synthesized from fly ash as a heterogeneous alkali catalyst through a transesterification reaction. The reactor in this study used a 1,000 ml three-necked boiling flask equipped with a condenser, cooling tank, and pump. Stirring and heating during the process of biodiesel production using a magnetic stirrer and a hot plate. The thermometer is used to measure the reaction temperature. Optimization of biodiesel production from zeolite catalyst synthesized from fly ash based on variations in the ratio of methanol: oil (8:1; 10:1; 12:1; and 14:1), catalyst weight (1, 2, 3, and 4% weight), and temperature (45 oC, 55 oC, and 65oC). Zeolite from fly ash produces biodiesel with a yield of 91.67% with optimum operating conditions reaction time of 60 minutes, methanol oil ratio of 8:1, operating temperature 55oC, and the amount of catalyst 1% by weight. This experiment confirms the possibility of utilizing fly ash waste for the application of catalysts in biodiesel production.
Sampah merupakan salah satu persoalan yang serius bagi negara berkembang termasuk Indonesia. Kota padang merupakan Ibu Kota Provinsi Sumatera Barat yang merupakan pusat pariwisata dan juga perdagangan dan kegiatan lainnya. Aktivitas tersebut dapat menimbulkan potensi timbulan sampah yang tinggi. Sampah tersebut apabila tidak dikelola dengan baik dapat menimbulkan persoalan lingkungan. Selama ini pengelolaan sampah dikota padang belum dilakukan secara maksimal terutama sampah organik yang hanya dibuang begitu saja. Tujuan dari kegiatan ini yaitu untuk meningkatkan kesadaran masyarakat dalam mengurangi timbulan sampah organik rumah tangga dan mewujudkan lingkungan yang bersih. Salah satu solusi untuk permasalahan tersebut adalah dengan proses pengolahan sampah organik menggunakan teknologi biokonversi menggunakan maggot BSF. Maggot adalah larva dari lalat Black Soldier Fly (BSF). Pengolahan sampah menggunakan maggot BSF dapat meningkatkan nilai ekonomi masyarakat karena memiliki nilai jual. Maggot BSF telah diketahui memiliki kandungan protein yang tinggi sehingga dapat dijadikan untuk pakan ternak. Pengabdian masyarakat ini dilakukan di RT 3/RW 11 Kelurahan Air Tawar Barat Kecamatan Padang Utara. Metode penyampaian sosialisasi yaitu dengan sistem ceramah dan komunikasi dua arah dengan peserta dan juga dilakukan praktek pengolahan sampah dengan maggot BSF secara langsung. Hasil kegiatan tersebut peserta sosialisasi telah mampu mengetahui dan memahami dengan baik cara pengolahan sampah menggunakan maggot BSF.
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