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All Journal TEKSTUR : Jurnal Teknologi Infrastruktur Journal of Innovative and Creativity
Ahmad Fadhly
Universitas Negeri Padang
Civil Engineering, Building, Construction & Architecture Education Environmental Science Languange, Linguistic, Communication & Media Mathematics Public Health Social Sciences Transportation Other

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Classification of Coal Quality Based on Proximate Analysis at CV. Bara Mitra Kencana to Meet the Requirements of Ombilin Power Plant Ahmad Fadhly; Jevie Carter Putra; Rudy Anarta; Trisna Prima Sari S
Journal of Innovative and Creativity Vol. 5 No. 1 (2025)
Publisher : Fakultas Ilmu Pendidikan Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/joecy.v5i1.3908

Abstract

Coal quality and classification was essential, as coal served as an alternative energy resource for industry. Prior to utilization, coal quality and classification were analyzed through laboratory testing. One method that was applied was the proximate analysis based on ASTM D388 standards. This study used coal samples collected from three coordinate points at CV. Bara Mitra Kencana. The test results indicated variations in coal quality. Coal from this location was utilized as fuel for the Ombilin Steam Power Plant (PLTU), with a blending process carried out beforehand to improve the economic value of lower-quality coal. The coal quality received by PLTU Ombilin was recorded at 17.00%, with a significant improvement observed after blending. Based on laboratory analysis, the coal was classified as bituminous—high volatile A, which was generally caking in nature. The calorific value obtained was 14,316 Btu/lb for sample I, and 14,062 Btu/lb for samples II and III. These results demonstrated that the calorific value of coal from CV. Bara Mitra Kencana exceeded 14,000 Btu/lb, thereby meeting the quality standards required for power plant operations.
Penurunan Kadar Fe Dan Mn Menggunakan Kapur Tohor (CaO) Pada Penetralan Air Asam Tambang Yolno Vernando; Afni Nelvi; Ahmad Fadhly; Dian Hadiyansyah; Hisni Rahmi
Jurnal Teknologi Infrastruktur Vol 7 No 02 (2025): Jurnal Teknologi Infrastruktur Vol 7 No 02 tahun 2025
Publisher : Fakultas Teknik Universitas Panca Bhakti

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Abstract

The treatment of acid mine drainage at PT Bumi Bara Makmur Mandiri is conducted using an active treatment method. It was found that there is cloudy wastewater with a brownish and reddish-brown color in the settling pond. The objective of this study was to analyze the changes in pH, Fe and Mn concentrations in acid mine drainage samples using quicklime and to calculate the cost required for neutralizing the acid mine drainage. The neutralization process was carried out on a laboratory scale using an experimental method with 3 variations of quicklime doses: 0.2 g/l, 0.3 g/l, and 0.4 g/l. The results showed that quicklime is effective in reducing Fe and Mn value in acid mine drainage. The initial pH of the acid mine drainage was 6.05. The pH increased with the increase in the quicklime coagulant dose. The Fe concentration before the neutralization of acid mine drainage was 1.20 mg/l, which decreased to 0.15 mg/L for all given dose variations. The initial Mn concentration exceeded the environmental quality standard and showed a significant reduction at a dosage of 0.2 g/L, decreasing from 72.20 mg/L to 0.08 mg/L. Similar Mn concentrations were obtained at dosages of 0.3 g/L and 0.4 g/L, each resulting in 0.122 mg/L. The cost required to neutralize Fe and Mn was IDR 368,000 per day, or IDR 11,040,000 per month.
Co-Authors Afni Nelvi Dian Hadiyansyah Hisni Rahmi Jevie Carter Putra Rudy Anarta Trisna Prima Sari S Yolno Vernando