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All Journal Jurnal Serambi Engineering FLUIDA Journal of Green Science and Technology
Saripudin Saripudin
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Pengaruh Waktu, Jumlah Yeast, dan Konsentrasi Substrat Pada Fermentasi Limbah Kulit Nanas Menjadi Bioetanol Skala Home Industry Harita Nurwahyu Chamidy; Saripudin Saripudin; Ayu Ratna Permanasari
Jurnal Serambi Engineering Vol 8, No 4 (2023): Oktober 2023
Publisher : Fakultas Teknik

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32672/jse.v8i4.6784

Abstract

Kulit nanas merupakan limbah yang mengandung glukosa sehingga dapat dimanfaatkan menjadi bioetanol. Kulit nanas selama ini belum banyak dimanfaatkan sehingga tidak memiliki nilai ekonomis.  Penelitian ini bertujuan memanfaatkan limbah kulit nanas untuk menjadi bioetanol dengan cara fermentasi, dimana proses fermentasi akan dilanjutkan dengan distilasi. Fokus penelitian ini berada pada variasi konsentrasi gula substrat karena kenyataannya limbah kulit nanas di lingkungan memiliki konsentrasi gula yang berbeda-beda. Penelitian ini dilakukan dalam skala home industry dengan proses yang dibuat semirip mungkin dengan proses pembuatan bioetanol yang dilakukan pada industri besar. Kapasitas produksi 5 L dengan substrat berupa air perasan kulit nanas. Variasi substrat yang digunakan adalah 3, 4, 5, dan 6 °Bx dengan waktu fermentasi 3 dan 5 hari. Mikroorganisme yang digunakan adalah yeast kering dengan variasi berat 5, 10, dan 15 g. Nutrien berupa pupuk NPK dan Urea dengan kadar 0,5% (b/v). Media fermentasi tidak disterilisasi untuk menyamakan dengan kondisi proses yang ada di industri bioetanol. Hasil fermentasi didistilasi pada suhu 83 °C selama kurang lebih 2 jam. Hasil terbaik diperoleh pada variasi konsentrasi substrat dengan kadar gula 6 °Bx, berat yeast 15 g, yaitu kadar alkohol setelah fermentasi sebesar 9 % dan hasil distilasi diperoleh kadar alkohol 45% sebanyak 170 ml.
Efektivitas Katalis Heterogen Fly Ash (FA-SO3H) pada Sintesis Biodiesel dari Palm Fatty Acid Distillate Sudrajat Harris Abdulloh; Eko Andrijanto; Saripudin Saripudin; Anindya Indrita Putri; Dhea Nurul; Lidya Elizabeth
Fluida Vol. 17 No. 1 (2024): FLUIDA
Publisher : Department of Chemical Engineering, Politeknik Negeri Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35313/fluida.v17i1.5286

Abstract

The increase in fuel use along with the decline in production of petroleum exploration activities encourages efforts to find alternative fuels, one of which is biodiesel from PFAD (Palm Fatty Acid Distillate) with production reaching 6,000,000 tons while its utilization is still low. Biodiesel production from PFAD using Fly ash (FA)-SO3H catalyst which is a heterogeneous catalyst through esterification method. FA used in this study was wet impregnated using 6M sulfuric acid (H2SO4) for 24 hours, so that the highest acid concentration was obtained at a calcination temperature of 500 ⁰C of 1.1654 mmol/gram. The research was conducted with Response Surface Method (RSM) with Box Behnken Design model in Design Expert 13 software and 13 runs were obtained. The resulting model from RSM was obtained as optimum conditions at catalyst loading (%-w) 5-10, methanol:PFAD molar ratio (n/n) 10:1-30:1, reaction time 3-5 hours and temperature 60 ⁰C. Based on the experimental results and ANOVA, the high conversion is influenced by the high catalyst loading and methanol:PFAD ratio (n/n), with the conversion obtained of 72.89% at catalyst loading of 10%-w, methanol:PFAD molar ratio of 20 (n/n) and time for 5 hours.
Natural Based Carbon Briquettes: The Effect of Coffee Ground Carbonization Temperatures as Renewable Energy Alternative Fauziah Ramadhani; Ghina Nabila Nur Sa’diyyah; Salsabila Azaliyah Putri; Danisa Dwi Anggraeni; Alfiana Adhitasari; Saripudin Saripudin
Journal of Green Science and Technology Vol 9 No 3 (2025): Journal of Green Science and Technology Vol. 9 No. 3 December 2025 Special Editio
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i3.10677

Abstract

Coffee consumption in Indonesia has been increasing over time. As a result of the high consumption and production, coffee waste often ends up in landfills. One potential solution to this problem is converting coffee waste into reusable products. Coffee grounds waste can be utilized as renewable energy in the form of briquettes. In this research, coffee grounds are used as briquette material. Briquettes are made by the carbonization method. Temperature plays a crucial role in determining the quality of briquette. This study aims to identify the optimum carbonization temperature, with variations of 350°C, 400°C, and 450°C. Each briquette sample was analyzed according to the Indonesian National Standard SNI 01-6235-2000. The results show that all carbonization temperatures produced briquettes with high calorific values (>5000 cal/g), that is 6981 cal/g at 350°C, 7037 cal/g at 400°C, and 7043 cal/g at 450°C. However, the resulting briquettes did not meet the standard criteria for density, fixed carbon, and volatile matter.
Co-Authors Alfiana Adhitasari Andrijanto, Eko Anindya Indrita Putri Danisa Dwi Anggraeni Dhea Nurul Elizabeth, Lidya Fauziah Ramadhani Ghina Nabila Nur Sa’diyyah Permanasari, Ayu Ratna Salsabila Azaliyah Putri Sudrajat Harris Abdulloh