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All Journal Prosiding Seminar Teknologi Kebumian dan Kelautan (SEMITAN Jurnal Sains dan Teknologi
Alieftiyani Paramita Gobel
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Dentistry Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Public Health Veterinary

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PRODUKTIVITAS EXCAVATOR DAN DUMP TRUCK PADA PENAMBANGAN BATUBARA DI PIT 1 UTARA BANKO BARAT PT. BUKIT ASAM TBK. Imam Azrief; Wan Agha Zulfadhli; Dhea Iqbal Mahmudi; Alieftiyani Paramita Gobel
Jurnal Sumberdaya Bumi Berkelanjutan (SEMITAN) Vol 1, No 1 (2022)
Publisher : Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.semitan.2022.3081

Abstract

Proses penambangan tentu saja harus dilakukan dengan penuh perhitungan agar mendapatkan hasil yang maksimal dengan minim kerugian untuk mencapai target yang telah disepakati bersama. Perhitungan produktivitas dan faktor keserasian kerja memegang peranan penting untuk mewujudkan proses penambangan yang optimal. Penelitian ini dilakukan di Pit 1 Utara Unit Penambangan Bangko Barat PT Bukit Asam Tbk, dengan pendekatan kuantitatif dengan orientasi lapangan, pengambilan data, pengolahan data, analisa dengan poin utama yaitu menghitung produktivitas dan faktor keserasian kerja alat gali-muat dan alat angkut batubara serta overburden, yang kemudian didapatkan hasil yaitu nilai perhitungan keserasian pada alat gali muat overburden sebesar 1,123 yang berarti, alat pengangkutan yang menunggu alat gali muat dan pada alat gali muat batubara sebesar 0,853 yang berarti, Alat gali muat menunggu alat pengangkutan.
Studi Pengolahan Limbah Fly Ash Batubara dalam Upaya Peningkatan Konsentrasi Silika Menggunakan Asam Sitrat Chinara Abinawa; Alieftiyani Paramita Gobel
INSOLOGI: Jurnal Sains dan Teknologi Vol. 3 No. 3 (2024): Juni 2024
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v3i3.3519

Abstract

The combustion of coal produces two types of waste, namely light ash (Fly Ash) and heavy ash (Bottom Ash). Fly ash is the waste generated by power plants, contributing to environmental pollution. According to data from the Ministry of Industry of the Republic of Indonesia in 2022, the current amount of fly ash and bottom ash in Indonesia continues to increase in line with the development and growth of the manufacturing industry as well as the increasing demand for electricity supplied by power plants. The combined fly ash and bottom ash generated from power plants alone in 2021 are estimated to reach 12 million tons, and it is projected to increase to 16.2 million tons by 2027. This poses a problem because the reused amount of fly ash and bottom ash is very small, necessitating the storage and/or landfilling of the remaining waste. The quantity of fly ash and bottom ash continues to grow without proper management, potentially contaminating the environment due to fine particles from coal combustion that become airborne. One way to utilize the silica contained in coal fly ash is through a hydrometallurgical extraction process. This process involves extracting metal compounds from ore using liquids such as acid. In the extraction process of silica from coal fly ash, pure citric acid is used as the extraction liquid. This process has several advantages compared to conventional processing methods, such as sintering or roasting, as it is more cost-effective, efficient, and environmentally friendly.
Optimasi Penggunaan NaOH dan Poly Aluminium Chloride pada Pengolahan Air Asam Tambang Batubara, Tanjung Enim, Sumatera Selatan Alieftiyani Paramita Gobel; Nur Athiyya; Nadia Thereza; Muhamad Hidayatul Ilham; Chairunnisa Van Gobel
INSOLOGI: Jurnal Sains dan Teknologi Vol. 4 No. 3 (2025): Juni 2025
Publisher : Yayasan Literasi Sains Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55123/insologi.v4i3.5346

Abstract

High rainwater runoff in coal mining areas has a significant effect on the intensity of acid mine drainage (AMD) formation. Therefore, efforts to treat AAT during the rainy season by applying active methods must consider efficient and effective aspects. Based on these conditions, this study will analyze the aspects of using an effective dose of NaOH in neutralizing the degree of acidity (pH) of AAT and analyze the use of an effective dose of Poly Aluminum Chloride (PAC) according to environmental quality standards regulated in South Sumatra Governor Regulation No. 8 of 2012 concerning Quality Standards for Coal Mining Liquid Waste. Sampling of AAT is carried out at the inlet of the coal mining settling pond, then the AAT sample is carried out to improve quality using NaOH and PAC materials using the jar test method. The formulation of the optimum dosage of NaOH and PAC to improve the quality of AAT using linear statistical analysis with a range of water pH values of 6 - 9. The results showed that the quality of AAT at the inlet of the settling pond had an initial pH of 4.9 and TSS 3716 mgl-1 and after treatment using NaOH and PAC there was an increase in the quality of AAT with pH and TSS meeting the water quality standards that are safe to flow into the river.
Co-Authors Chairunnisa Van Gobel Chinara Abinawa Dhea Iqbal Mahmudi Imam Azrief Muhamad Hidayatul Ilham Nadia Thereza Nur Athiyya Wan Agha Zulfadhli