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All Journal Jurnal Teknologi Industri Pertanian Seminar Nasional Lahan Suboptimal
Yulistika, Efri
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Agriculture, Biological Sciences & Forestry Engineering Industrial & Manufacturing Engineering Other

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Menduga Umur Simpan Kemplang yang Dimatangkan Menggunakan Microwave berdasarkan Persamaan Arrhenius Parwiyanti, Parwiyanti; Yulistika, Efri; Rosidah, Umi; Lidiasari, Eka; Indriyani Syafutri, Merynda
Seminar Nasional Lahan Suboptimal Vol 11, No 1 (2023): Prosiding Seminar Nasional Lahan Suboptimal ke-11 “Optimalisasi Pengelolaan Lah
Publisher : Pusat Unggulan Riset Pengembangan Lahan Suboptimal (PUR-PLSO) Universitas Sriwijaya

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Parwiyanti, P., Yulistika, E., Rosidah, U., Lidiasari, E., & Syafutri, M. I. (2023). Estimation shelf life of microwavable fish crackers using the arrhenius reaction kinetics equation. In: Herlinda, S. et al. (Eds.), Prosiding Seminar Nasional Lahan Suboptimal ke-11 Tahun 2023, Palembang 21 Oktober 2023. (pp. 110-117).  Palembang: Penerbit & Percetakan Universitas Sriwijaya (UNSRI).Microwavable fish crackers had hygroscopic properties so it needs to be packaged properly. The objective of this research was to determine the shelf life of microwavable-packaged fish crackers. The fish crackers microwave was packed with three various method which are polypropylene (PP), PP + silica gel, and nylon + vacuum. Estimation of shelf life was done by calculating the parameters of degradation of microwavable fish crackers with the reaction kinetics equation and processed using the Arrhenius equation. The quality parameter was moisture content. Quality parameters are measured every 5 days during 30 days of storage at 30oC. The results showed that the kinetics of changes in the water content of microwavable fish crackers packed in three packaging combinations following reaction order one(1) and order two(2). The shelf life of microwavable fish crackers packaged in PP was 27 days, PP+silica gel packs was 29 days, and nylon+vacuum packs was 31 days. 
USED TIRE ECOSYSTEM FOR THE RECLAIMED RUBBER INDUSTRY DEVELOPMENT AT PT BRIDGESTONE TIRE INDONESIA Suparno, Ono; Suprihatin; Indrasti, Nastiti Siswi; Hardjomidjojo, Hartrisari; Sunarti, Titi Candra; Utomo, Prasetyo Hadi; Yulistika, Efri; Triyonggo, Yunus; Matasik, Delfania
Jurnal Teknologi Industri Pertanian Vol. 35 No. 2 (2025): Jurnal Teknologi Industri Pertanian
Publisher : Department of Agroindustrial Technology, Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24961/j.tek.ind.pert.2025.35.2.208

Abstract

Managing end-of-life tyres (ELTs) has become an urgent global issue because tyres are difficult to decompose naturally and take more than 50 years to break down. In the Jabodetabek (Jakarta, Bogor, Depok, Tangerang, Bekasi) area, ELT generation is estimated at 2.5–3 million units annually, with the most significant contributions from Karawang (1,000 units per month) and Bogor (820 units per month). Bias-ply used tires, which contain up to 70% rubber, have significant potential for recycling into raw materials for new tires through reclaimed rubber technology, aligning with the principles of a circular economy. This study aims to map the supply chain ecosystem of ELTs, identify key stakeholders, and optimise material flow to support the development of the rubber industry from reclaimed materials. The study employs a qualitative descriptive method. The number of research locations was determined using the Solvin method with an error rate of 25%. Observations were performed at 15 specific tire shops, two truck tire shops, three fleets, and three used tire collectors in the Jabodetabek and West Java areas. The findings indicate that the total estimated number of ELTs collected in Jabodetabek from tire stores, truck tires, fleets, and collectors reaches 2,860 monthly units. The main challenges in ELT management include limited storage facilities, low awareness of the economic value of waste, and a predominantly conventional management system. The study also reveals that only 20% of ELTs are utilised optimally, highlighting a significant untapped potential.  Keywords: used tires, reclaimed rubber, supply chain, circular economy
Co-Authors Eka Lidiasari Hartrisari Hardjomidjojo Indriyani Syafutri, Merynda Matasik, Delfania Nastiti Siswi Indrasti Ono Suparno Parwiyanti Parwiyanti, Parwiyanti Rosidah, Umi Suprihatin Titi Candra Sunarti Utomo, Prasetyo Hadi Yunus Triyonggo, Yunus