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INDONESIA
Jurnal Mineral, Energi dan Lingkungan
Published by Universitas Pembangunan Nasional Veteran Yogyakarta
ISSN : -     EISSN : -     DOI : -
Core Subject : Science,
Energy
Arjuna Subject : -
Articles 7 Documents
 1 
Search results for , issue "Vol 6, No 2 (2022): Desember" : 7 Documents clear
Karakterisasi Sifat Fisik Dan Kimia Tanah Pada Lahan Bekas Tambang Batubara Yang Telah Direklamasi Dhimas Aji Pramaditya
Jurnal Mineral, Energi dan Lingkungan Vol 6, No 2 (2022): Desember
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v6i2.8022

Abstract

Pertambangan batubara di Indonesia sebagian besar menerapkan sistem penambangan secara terbuka (open pit mining). Sistem penambangan terbuka dapat berdampak pada penurunan kualitas tanah dan ekosistem. Hilangnya lapisan pada tanah membuat sifat fisik dan kimia tanah menjadi terganggu. Sehingga diperlukan upaya reklamasi pada tanah pasca tambang batubara untuk memperbaiki kualitas sifat fisik dan kimia tanah agar dapat berfungsi sebagai media tumbuh. Penelitian ini bertujuan untuk mengetahui karakterisasi dan keragaman sifat fisik dan kimia pada tanah di lahan pasca tambang di PT. X dengan usia lahan reklamasi yaitu 1 tahun, usia 2 tahun, dan usia 3 tahun dengan kondisi topografi slope dan flat. Sifat fisik yang diuji meliputi tekstur tanah, bulk density, permeabilitas, dan kemantapan agregat, serta sifat kimia tanah meliputi pH tanah, C-organik, N-total, P-total, K-total, kejenuhan basa dan kapasitas tukar kation (KTK). Metode yang digunakan pada penelitian ini yaitu observasi lapangan yang dilanjutkan dengan analisis hasil sampel ke laboratorium. Hasil penelitian ini menunjukkan bahwa berdasarkan hasil uji parameter dan analisis sifat fisika dan kimia tanah pada lahan reklamasi bekas tambang batubara usia 1 tahun, 2 tahun, dan 3 tahun cendrung memiliki sifat fisika dan kimia yang rendah. Sifat fisika dan kimia pada topografi slope cenderung lebih baik khususnya pada usia lahan 2 tahun untuk beberapa parameter dibandingkan dengan topografi slope, meskipun pada keduanya masih cenderung dalam kategori rendah. Parameter sifat kimia tanah (KTK, C-organik, P-total) mengalami peningkatan sebanding dengan meningkatnya parameter fisika (permeabilitas, bulk density, dan kemantapan agregat). Berdasarkan hasil analisis parameter- parameter pada penentuan status kesuburan tanah, seluruh usia lahan reklamasi bekas tambang batubara masih dalam kategori status kesuburan rendah.
PEMANFAATAN BIOCHAR BERBAHAN DASAR AMPAS TEBU (Saccharum Officinarum Linn) SEBAGAI BAHAN PEMBENAH TANAH PADA LAHAN BEKAS TAMBANG BATUBARA Elma Nazella
Jurnal Mineral, Energi dan Lingkungan Vol 6, No 2 (2022): Desember
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v6i2.8096

Abstract

Mining activities in South Kalimantan are carried out openly which have an impact on changes in soil structure due to excavation of top soil to reach deeper layers of mining material. The soil in the mining area is infertile with a high acidity level with very low nutrients, water retention, unstructured, and the content of elements is toxic. Therefore, it is necessary to carry out treatment through remediation of mining land to restore the carrying capacity of the soil. One alternative that can be used is biochar made from bagasse. This study aims to determine the characteristics of bagasse biochar and see the effect of using bagasse biochar with variations in dosage and contact time on the soil improvement process in stabilizing pH and eliminating soil Fe levels. The soil remediation process was carried out on a laboratory scale with various doses of biochar (0 g, 7.5 g, 15 g and 30 g) and contact time (15 days, 30 days, and 45 days). The results showed that bagasse biochar has characteristics that meet the requirements as a soil enhancer based on pH, C/N ratio, organic C, total N, CEC, total P, total K, ash content and water content. The results of remediation carried out for 45 days showed that bagasse biochar was able to neutralize the initial pH from 4.9 to 6.9 and was able to reduce Fe levels by 8158.1 mg/kg.Keyworld: Biochar, Sugarcane Bagasse Mining Land, Heavy Metal (Fe), pH
TUBING STRENGTH ANALYSIS AND FAILURE ASSESSMENT OF ELECTRICAL SUBMERSIBLE PUMP (ESP) WELL: A CASE STUDY ON PRODUCTION WELL “X” Brian Tony; Steven Chandra
Jurnal Mineral, Energi dan Lingkungan Vol 6, No 2 (2022): Desember
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v6i2.7701

Abstract

This study will discuss the evaluation of tubing strength in Well X that using Electrical Submersible Pump as an artificial lifting method. The evaluation will be carried out to determine the risk of failure of production tubing due to erosional damage and the failure due to loads on tubing during production operation using Electrical Submersible Pump. Burst, collapse, and tension loads will be the main focus in evaluating the tubing load by considering the worst conditions that may be experienced during production operation. The calculation of the tubing load is done using Microsoft Excel. The result of tubing load calculation will be compared with the tubing rating based on tubing grade. Erosional damage prediction is carried out using software to determine the erosional velocity on the production tubing.This study will evaluate the production tubing used in Well X with an outer diameter of 3.5 inch and L-80 tubing grade. Tubing L-80 has a burst rating of 7240 psi, a collapse rating of 10533.92 psi, and a tension rating of 107581.11 lbf. Tubing is rating will be the limit that determines the integrity of the well during the production period. Based on the evaluation result, L-80 production tubing that using Electrical Submersible Pump as an artificial lifting method is able to withstand the burst load, collapse load, tension load, and the erosional effect of the produced fluid. Therefore, the Electrical Submersible Pump in Well X as an artificial lift system can be carried out without changing the grade of the existing tubing production.
PEMANFAATAN BIOCHAR BERBAHAN DASAR SERESAH DAUN BAMBU (BAMBUSA VULGARIS) SEBAGAI BAHAN PEMBENAH TANAH PADA LAHAN BEKAS TAMBANG BATUBARA Rida Noryanti
Jurnal Mineral, Energi dan Lingkungan Vol 6, No 2 (2022): Desember
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v6i2.8160

Abstract

Kegiatan pertambangan pada umumnya menghasilkan bahan pencemar berupa kadar logam berat yang melebihi kadar normal. Kelebihan logam berat dalam tanah tidak hanya memberikan dampak buruk untuk tanaman dan organisme tetapi dapat menyebabkan suatu pencemaran lingkungan. Selain itu, kegiatan penambangan juga menyebabkan terjadinya perubahan total dari suatu ekosistem yaitu salah satunya kerusakan lahan yang dapat berpengaruh pada kondisi fisik, kimia dan biologi tanah. Salah satu cara untuk memperbaiki kerusakan tanah akibat kegiatan pertambangan yaitu dengan memanfaatkan biochar sebagai bahan pembenah tanah. Biochar yang digunakan dalam penelitian ini berbahan dasar seresah daun bambu. Penelitian ini bertujuan untuk menganalisis pengaruh biochar dalam menurunkan kandungan Fe dan menaikkan pH pada sampel tanah tercemar serta menganalisis variasi dosis dan variasi waktu kontak yang paling efektif dalam menurunkan kandungan Fe dan menaikkan pH pada sampel tanah tercemar. Pada penelitian ini, biochar seresah daun bambu memiliki karakteristik sebagai pembenah tanah yang sesuai dengan persyaratan berdasarkan nilai pH, C-organik, rasio C/N, P-total, K-total, Kapasitas Tukar Kation, kadar air, dan kadar abu. Selain itu, komposisi dosis biochar dan waktu kontak yang paling efektif yaitu didapatkan pada variasi P3 dengan waktu kontak 45 hari.
Literature Review: Comparison of Caron Process and RKEF On The Processing of Nickel Laterite Ore For Battery Muhamad Alfa Rizky; Untung Sukamto; Agris Setiawan
Jurnal Mineral, Energi dan Lingkungan Vol 6, No 2 (2022): Desember
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v6i2.6900

Abstract

Indonesia has abundant resources, especially in natural resources (SDA), one of which is nickel. Nickel is a metal that is loved by many people because of the rapid development of technology in creating electric transportation, in particular, the application of nickel is one of the batteries. Nickel resources in the world are available in the form of Nickel Oxide as much as 60% and the remaining 40% is available in the form of sulfide reserves. Currently, there are 2 extraction methods, namely hydrometallurgy (Caron Process) and pyrometallurgy (Rotary Kiln Electric Furnace). Hydrometallurgy is a process used for nickel ore that has a grade of < 1.5%, while pyrometallurgy is still used for nickel ore that has a Ni content of < 3%. At present, the most common hydrometallurgical process is applied to limonite nickel ore. While the extraction process in pyrometallurgy uses saprolite nickel ore. Nickel metal processing, currently the best and the cheapest in terms of production costs is the hydrometallurgical process followed by the pyrometallurgical process. Using low-grade nickel is more suitable for manufacturing battery manufacture. The reason is that the Limonite Nickel reserves are more and can increase the selling value of the nickel ore. Thus, it is necessary to pay attention to the development in the processing process to increase the purity of the nickel-metal itself.
TINJAUAN SINGKAT OPTIMALISASI PEMANFAATAN ENERGI SURYA PADA SEKTOR RUMAH TANGGA Ligan Budi Pratomo; Nazaruddin Sinaga
Jurnal Mineral, Energi dan Lingkungan Vol 6, No 2 (2022): Desember
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v6i2.4777

Abstract

Energy use always increases, especially fossil energy. Through the National Energy Policy, the government continues to strive to increase the role of new and renewable energy sources so as to reduce dependence on fossil energy. Solar power generation is a type of renewable energy generator that capable to convert solar energy to electric energy. The main components of solar power generatios are batteries, solar panels, charger controllers, and inverters.  Solar power generations technology itself is always being developed, such as automatic monitoring and sun tracking systems designed to improve system performance. One of the applications of solar power generations is in the household sector. In this sector consumes 49% of the national electricity energy in 2018. This type of generator is categorized as a roof solar power generations. Based on existing data, there were 1400  roof solar power generations users in September 2019. The development of solar energy utilization for the household sector is very appropriate because it can help achieve renewable energy about 23% in 2025 and 31% in 2050 in the national energy mix.
Tinjauan Singkat Sistem PLTP Siklus Gabungan Sarulla Menggunakan Ormat Energy Converter Jonius Christian Harefa
Jurnal Mineral, Energi dan Lingkungan Vol 6, No 2 (2022): Desember
Publisher : Fakultas Teknologi Mineral, Universitas Pembangunan Nasional (UPN)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/jmel.v6i2.5298

Abstract

Energi panas bumi pemanfaatannya masih belum maksimal di Indonesia. Hingga tahun 2020 realisasi pengembangan panas bumi menjadi listrik adalah sebesar 2.130,7 MW. Salah satu pembangkit listrik panas bumi (PLTP) di Indonesia yang telah beroperasi adalah Sarulla Geothermal Power Plant. Kapasitas total yang dihasilkan Sarulla adalah sebesar 330 MW. Sarulla merupakan Geothermal Combined Cycle yang menggunakan binary power plant untuk memaksimalkan energi panas bumi yang ada. Keluaran Steam Turbine Generator (STG) dimanfaatkan melalui Bottoming OEC untuk menghasilkan listrik sebesar 7 MW sedangkan Hot Water (Brine) dimanfaatkan melalui Brine OEC untuk menghasilkan listrik sebesar 15 MW. Keluaran uap sisa dan brine yang pada umumnya di injeksikan langsung pada injection well,  dengan teknologi binary dari Ormat Energy Converter (OEC) kemudian dimanfaatkan untuk memaksimalkan energi panas bumi dengan menghasilkan listrik dengan kapasitas yang lebih kecil.

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