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All Journal Jurnal Teknik PWK Jurnal Elementer (Elektro dan Mesin Terapan)
Apriani, Santi
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Electrical & Electronics Engineering Engineering Mechanical Engineering

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Analisis Pengaruh Jumlah Variasi Katalis MeOH Pada Pembuatan Biodiesel Melalui Proses Transesterifikasi Harmiansyah; Efendi, Rustam; Muslimah, Siti; Hikmawati, Meli; Apriani, Santi; Simbolon, Sinober; Setiawan, Wahyu
Jurnal ELEMENTER (Elektro dan Mesin Terapan) Vol. 9 No. 1 (2023): Jurnal Elektro dan Mesin Terapan (ELEMENTER)
Publisher : Politeknik Caltex Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35143/elementer.v9i1.5927

Abstract

Biodiesel is a bioenergy or biofuel produced by transesterification of vegetable oil (animal fat). Transesterification is a chemical method in which oil triglycerides react with methanol with the help of an alkaline catalyst to produce biodiesel. The goal of this study is to determine the quality of biodiesel utilizing MeOH as a catalyst throughout the transesterification process. This study aims to produce biodiesel using the transesterification process with palm oil as the main raw material. Making biodiesel begins with heating the palm oil at 61-65 oC and then adding a mixture of NaOH and methanol solutions so that glycerol, emulsion, and biodiesel are obtained as a result of transesterification. Finally, a separatory funnel is used to obtain pure biodiesel. The yield values of biodiesel produced with MeOH catalysts of 20%, 25%, and 30% were 81.5%, 86.6%, and 44.4%, respectively. Furthermore, this study performed density calculations that influenced the quality of biodiesel from each amount of MeOH utilized to achieve a density of 0.85 g/ml. As can be observed, the usage of MeOH catalyst has an effect on the quality of biodiesel yields.
Kesesuaian Penggunaan Lahan Pertanian Pada Kawasan Rawan Bencana Kecamatan Selo Apriani, Santi; Pigawati, Bitta
Teknik PWK (Perencanaan Wilayah Kota) Vol 13, No 2 (2024): Mei 2024
Publisher : Jurusan Perencanaan Wilayah dan Kota

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/tpwk.2024.39356

Abstract

Selo District is one of the disaster-prone areas in Boyolali Regency. Selo District has a vulnerability to the eruption of Mount Merapi, landslides, and the danger of soil erosion. There are at least 6 out of 10 villages in Selo District that have high disaster vulnerability. The majority of people in Selo District have livelihoods as farmers. In fulfilling food needs, the community began to increase production and expand production areas. To determine the suitability of the use of agricultural land in Selo District, which is in a landslide-prone area, a remote sensing method was carried out through guided classification for primary data acquisition. Analysis was carried out with remote sensing analysis activities through spatial analysis of land use, multiple natural disasters, land capability, suitability of agricultural land use based on land capability, and suitability of agricultural land use in disaster areas. The result is that agricultural land is dominated by suitable land by 62.8% and not suitable by 38.2% with aggravating factors in the form of erosion and landslides. 
Co-Authors Bitta Pigawati Harmiansyah Hikmawati, Meli Rustam Efendi Simbolon, Sinober Siti Muslimah Wahyu Setiawan