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All Journal Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan JURNAL INOVASI TEKNIK INDUSTRI
Fitri, Li Idi'il
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Agriculture, Biological Sciences & Forestry Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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The Potential of Spent Bleaching Earth In Charcoal Briquettes as Energy Source Tarigan, Enda Rasilta; Mirnandaulia, Meutia; Mustakim, Mustakim; Sitinjak, Anna Angela; Purba, Darry Christine Silowaty; Karo-Karo, Justaman Arifin; Silalahi, Meriahni; Fitri, Li Idi'il; Anwar, Dedy
Jurnal Presipitasi : Media Komunikasi dan Pengembangan Teknik Lingkungan Vol 22, No 2 (2025): July 2025
Publisher : Universitas Diponegoro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/presipitasi.v22i2.380-392

Abstract

Eco-friendly alternative fuels encourage the use of waste biomass as a material for making briquettes. This study aimed to develop briquettes from rice husk biomass and peat moss and add spent leaching earth (SBE). SBE is a hazardous and toxic waste increasingly piling up in landfills. The research method involved carbonizing rice husks and peat moss, mixing them with SBE, molding with a 200 kg/cm2 Hydraulic Press, and drying. The resulting briquettes had an average water content of 5.86% and an ash content of 2.18%, which meet the SNI No. 01/6235/2000 standard. Morphological analysis revealed that the briquettes were round but exhibited non-homogeneous aggregation. The highest calorific value was found in C4 briquettes of 5030.17 cal/gr. The composition of C4 was 40% rice husk charcoal (4.8 g), 45% peat (5.4 g), and 15% SBE (1.8 g), with SBE dried for seven days. The addition of peat increased the calorific value of the briquettes. Based on scanning electron microscopy (SEM)/ energy-dispersive X-ray (EDX) analysis, the carbon content in the C4 briquettes reached 72.2%. This study shows that the combination of rice husk charcoal, SBE, and peat provides a renewable energy source and contributes to the reduction of environmental waste, thereby promoting sustainability. 
PENGENDALIAN BAHAN BAKU ADSORBENT SULFUR REMOVAL DENGAN PENDEKATAN EOQ DAN REORDER POINT DI PT.XYZ Fitri, Li Idi'il; Putra, Riki Rianda; Syukriah, Syukriah
Jurnal Inovasi Teknik Industri Vol 4, No 1 (2025): JURNAL INOVASI TEKNIK INDUSTRI
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Muhammadiyah Gombong

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26753/jitin.v4i1.1690

Abstract

PT XYZ mengalami kendala keterlambatan produksi Adsorbent Sulfur Removal akibat persediaan bahan baku tidak cukup ketika dibutuhkan. Bahan baku Adsorbent Sulfur Removal yaitu FeSO4.7H2O dan Na2CO3. Penelitian ini bertujuan untuk menganalisis pengendalian bahan baku Adsorbent Sulfur Removal dengan pendekatan Economic Order Quantity (EOQ). Kebijakan perusahaan sebelumnya adalah melakukan pemesanan tiga kali dalam setahun dengan kuantitias pemesanan sebesar 66,000 kg untuk FeSO4.7H2O dan 24,440 kg untuk Na2CO3. Menurut pendekatan EOQ, pemesanan FeSO4.7H2O dilakukan setiap 13 bulan sekali dengan kuantitas 198,997 kg dan pemesanan Na2CO3 dilakukan setiap 20 bulan sekali dengan kuantitas 121,045 kg. Selain itu, ada juga reorder point sebagai patokan perusahaan untuk melakukan pemesanan kembali yaitu ketika inventori sudah mencapai 66,000 kg untuk FeSO4.7H2O dan 18,330 kg untuk Na2CO3. Kebijakan persediaan dengan pendekatan EOQ dapat menghemat hingga Rp8.115.168 dalam setahun dibanding kebijakan perusahaan. Total biaya yang dikeluarkan dari kebijakan awal perusahaan adalah Rp16.130.000, sedangkan total biaya yang dikeluarkan dari pendekatan EOQ hanya Rp 8.014.832.
Co-Authors ANWAR, DEDY Karo-Karo, Justaman Arifin Mirnandaulia, Meutia Mustakim Mustakim Purba, Darry Christine Silowaty Putra, Riki Rianda Silalahi, Meriahni Syukriah Syukriah, Syukriah Tarigan, Enda Rasilta