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All Journal Eduvest - Journal of Universal Studies Jurnal Ragam Pengabdian
Mokh Suef
Institut Teknologi Sepuluh Nopember
Aerospace Engineering Computer Science & IT Environmental Science Health Professions Neuroscience Social Sciences Other

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Analisis Tekno-Ekonomi Redundant Bag Filter Dibandingkan Multicyclone Pada Sistem Filtrasi Fly Ash Pltu Stoker Ahmad Asy’ari Syarif; Mokh Suef
Jurnal Ragam Pengabdian Vol. 3 No. 2 (2026): Mei-Agustus, Sustainable Development Goals (SDGs): Multidisciplinary Perspectiv
Publisher : Lembaga Teewan Journal Solutions

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62710/4gfqbk73

Abstract

Fly ash merupakan salah satu limbah utama yang dihasilkan dari proses pembakaran batubara pada Pembangkit Listrik Tenaga Uap (PLTU) tipe Stoker. Pengelolaan fly ash di Pembangkit yang tidak optimal menyebabkan pencemaran lingkungan dan gangguan operasional akibat akumulasi debu di sistem . Dengan terbitnya PP No. 22 Tahun 2021, fly ash dan bottom ash dari beberapa PLTU tidak lagi masuk dalam kategori limbah B3, namun tetap masuk dalam pengaturan pengelolaan lingkungan. Meskipun perubahan status ini mengurangi beban izin, pengelolaan tetap wajib memenuhi persyaratan teknis dan persetujuan lingkungan sesuai Permen LHK No. 6 Tahun 2021.  Penelitian ini bertujuan untuk mengevaluasi dan membandingkan dua teknologi sistem filtrasi fly ash, yaitu Redundant Bag Filter dan Multicyclone, dari aspek teknis dan ekonomi (tekno-ekonomi), secara serentak guna menentukan alternatif yang paling layak diterapkan pada PLTU Stoker. Metode penelitian yang digunakan adalah pendekatan kuantitatif komparatif, dengan pengumpulan data primer melalui observasi dan wawancara, serta data sekunder dari laporan operasional, biaya investasi, dan histori downtime. Lokasi penelitian mencakup PLTU Tidore (menggunakan Redundant Bag Filter) dan PLTU Ropa (menggunakan Multicyclone). Analisis dilakukan terhadap efisiensi penyaringan, jumlah dan durasi gangguan, biaya investasi (CAPEX), biaya operasional (OPEX), penghitungan Return on Investment (ROI), dan Net Present Value (NPV) serta Penilaian akhir dilakukan dengan Menggunakan metode Technique for Order Preference by Similarity to Ideal Solution (TOPSIS)  diharapkan untuk mengetahui perbandingan akhir antara Redundant Bag Filter dan Multicyclone mampu menunjukkan Teknologi Filtrasi yang paling tepat di implementasi PLTU Stoker secara teknis maupun secara ekonomis, meningkatkan efisiensi operasional, serta memberikan ROI dan NPV yang lebih baik.
Optimization of Preventive Replacement of Critical Components in the Komatsu PC2000-8 Excavator to Minimize Downtime at PT XYZ Imam Nur Soleh; Mokh Suef
Eduvest - Journal of Universal Studies Vol. 6 No. 8 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i8.53324

Abstract

The availability of primary loading equipment, particularly the Komatsu PC2000-8 excavator, is a key determinant of operational efficiency in open-pit mining. Failures of critical components directly affect downtime, maintenance costs, and key performance indicators, including physical availability (PA), mean time between failures (MTBF), and mean time to repair (MTTR). Current preventive maintenance practices, which largely follow generic original equipment manufacturer (OEM) replacement intervals, often fail to prevent actual breakdowns, highlighting the need to optimize preventive replacement intervals based on cost and downtime minimization. This study aims to determine the optimal preventive replacement intervals for the critical components of the Komatsu PC2000-8 excavator to minimize downtime and maintenance costs while improving equipment availability. The study employed a quantitative comparative optimization approach. Critical components were identified using a Pareto diagram based on failure frequency and cumulative downtime. Reliability analysis was performed by selecting the most appropriate time-between-failures distribution using Relyence Weibull software to estimate the distribution parameters. Reliability, hazard rate, MTBF, and cost analyses comparing preventive and corrective replacement—including spare parts, labor, supporting equipment, and lost production or contractual implications—were subsequently performed. An Age Replacement policy was then optimized to determine replacement intervals that minimized the long-run average cost per unit time while satisfying equipment availability constraints. The results indicated that the optimal preventive replacement intervals based on cost minimization were 11,545 hours for the Boom Cylinder, 16,820 hours for the Turbocharger, 7,366 hours for the Water Pump, 20,026 hours for the Final Drive, and 19,624 hours for the Radiator.
Co-Authors Ahmad Asy’ari Syarif Imam Nur Soleh