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Rany Puspita Dewi
Jurusan Teknik Mesin, Fakultas Teknik, Universitas Tidar
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences

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Journal : Journal of Mechanical Engineering

 1 
STUDI POTENSI LIMBAH KULIT KOPI SEBAGAI SUMBER ENERGI TERBARUKAN DI WILAYAH JAWA TENGAH Rany Puspita Dewi; Trisma Jaya Saputra; Sri Widodo
Journal of Mechanical Engineering Vol 5, No 1 (2021): Journal of Mechanical Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/jom.v5i1.3946

Abstract

ABSTRAKBiomassa menjadi salah satu sumber energi yang menjanjikan untuk mengurangi ketergantungan kita terhadap energi fosil. Salah satu sumber biomassa yang masih belum dimanfaatkan secara optimal dari hasil perkebunan yaitu berasal dari tanaman kopi. Kulit kopi sebagai by product dari proses pengolahan kopi masih dibuang begitu saja dan dapat menimbulkan pencemaran lingkungan. Tahun 2020, Provinsi Jawa Tengah memproduksi kopi sebesar 24,90 ton. Jumlah ini dapat menghasilkan limbah kulit kopi sekitar 8,71 ton. Limbah kulit kopi dapat dimanfaatkan menjadi briket melalui teknologi pembriketan. Hasil perhitungan analisis ekonomi menunjukkan bahwa harga jual briket kulit kopi per kg adalah Rp. 3.900,-. Laba bersih yang diperoleh selama 1 tahun dalam pembuatan briket kulit kopi adalah Rp. 14.085.000,-. Dibandingkan dengan bahan bakar lain (minyak tanah dan LPG), briket kulit kopi memiliki nilai kalor tidak jauh berbeda dengan harga yang lebih murah.  Dari segi biaya, dibandingkan dengan bahan bakar minyak tanah, briket kulit kopi membutuhkan biaya yang jauh lebih rendah sekitar 54%.Kata kunci: biomassa, kulit kopi, briket, ekonomi ABSTRACTBiomass is a promising energy source to reduce our dependence on fossil energy. One source of biomass that is not optimally used is from plantation products, one comes from the coffee plant. Coffee skin as a by-product from the coffee processing process is still thrown away and can cause environmental pollution. In 2020, Central Java Province produced 24.90 tonnes of coffee. The amount can produce around 8.71 tonnes of coffee husk waste. Coffee skin waste can be used to become briquettes through briquette technology. The results of the economic analysis showed that the selling price of coffee skin briquettes per kg is Rp. 3,900. The net profit for 1 year in making coffee skin briquettes is Rp. 14,085,000. Compared to other fuels (kerosene and LPG), coffee skin briquettes have a calorific value not much different with a cheaper price. In terms of cost, compared to kerosene, coffee skin briquettes require a much lower cost of around 54%. Keyword: biomassa, coffee husks, briquettes, economy
KAJIAN POTENSI PEMANFAATAN BIOGAS SEBAGAI SALAH SATU SUMBER ENERGI ALTERNATIF DI WILAYAH MAGELANG Rany Puspita Dewi
Journal of Mechanical Engineering Vol 2, No 1 (2018): Journal of Mechanical Engineering
Publisher : Universitas Tidar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31002/jom.v2i1.804

Abstract

The increasing consumption of fossil-based energy especially LPG (Liquid Petroleum Gas) that is not balanced with the availability of energy source, required a development of alternative energy with abundant amount and environmentally friendly. One of alternative energy source feasible to develop is the one from biomass waste that is livestock manure. Magelang becomes one of potential area in Central Jawa as biogas development. Biogas is produced by using digester anaerobically. Magelang has livestock about 142.127 with potency of gas production about 86.690 m3. The resulted biogas production equals to 43.345 kg of LPG or 14.448 of LPG 3 kg which is can fullfill the cooking needs for about 278 households in one year.Keywords: biogas, energy, LPG
Co-Authors Arif Rahman Saleh Herru Santosa Budiono Kholik, Muhammad Ramlan Manullang Sigit Joko Purnomo Sri Hastuti Sri Widodo Trisma Jaya Saputra Trisma Jaya Saputra Trisma Jaya Saputra Wandi Arnandi Wandi Arnandi Wandi Arnandi