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All Journal Cannarium (Jurnal Ilmu-ilmu Pertanian) Venus: Jurnal Publikasi Rumpun Ilmu Teknik
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Agriculture, Biological Sciences & Forestry Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Engineering Environmental Science Social Sciences

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PERCEPTION AND COMMUNITY BEHAVIOR IN MANAGEMENT WATERSHED MOLULU IN WANGONGIRA VILLAGE ronal ronal
Jurnal Cannarium Vol 15, No 2 (2017): Desember
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (17.36 KB)

Abstract

Daerah Aliran Sungai (DAS) merupakan satu kesatuan ekosistem yang unsur-unsur utamanya terdiri atas sumberdaya alam tanah, air dan vegetasi serta sumberdaya manusia sebagai pelaku pemanfaat sumberdaya alam tersebut.Pertambahan jumlah penduduk di Indonesia memperlihatkan kecenderungan yang meningkat dari tahun ke tahun.Sejalan dengan pertambahan penduduk, terjadi pula peningkatan kebutuhan lahan untuk memenuhi berbagai aktivitas pembangunan.
Studi Pengaruh Lama Penumpukan Batubara terhadap Kualitas Proximate Batubara di ROM Coal Stockpile pada PT Multi Harapan Utama Kabupaten Kutai Kartanegara Provinsi Kalimantan Timur Ronal Ronal; Windhu Nugroho; Revia Oktaviani; Agus Winarno; Ardhan Ismail
Venus: Jurnal Publikasi Rumpun Ilmu Teknik  Vol. 3 No. 6 (2025): Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/venus.v3i6.1218

Abstract

During the coal stockpiling process, the quality of coal may increase or decrease due to direct exposure to open environmental conditions, which can lead to changes in its characteristics. The longer the coal is stored in an open area, the more it undergoes changes caused by rainfall, heat, and air exposure, resulting in an increase in moisture content and ash content, while the calorific value decreases. Therefore, this research was conducted to determine the optimal coal stockpiling duration at the ROM coal stockpile to ensure that the calorific value does not significantly decrease. Coal sampling was carried out every two days from the initial time of stockpiling. After a two-month stockpiling period, the final coal quality results showed a total moisture of 13.89% (ar), inherent moisture of 15.95% (ad), ash content of 4.59% (ad), volatile matter of 40.3% (ad), and fixed carbon of 39.16% (ad). Based on these results, it can be concluded that the recommended storage duration for MCV-HS type coal at the ROM coal stockpile is 154 days. The laboratory analysis results obtained during the research indicate that the longer the coal is stored, the higher the moisture content and ash content become, while the calorific value continues to decrease. This occurs due to water absorption and oxidation reactions that take place during the coal storage period in the ROM coal stockpile.
Co-Authors Agus Winarno Ardhan Ismail Revia Oktaviani windhu Nugroho