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Kusdarini, Esthi
Institut Teknologi Adhi Tama Surabaya
Arts Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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Aplikasi Persamaan Regresi Linier untuk Memprediksi Kebutuhan Kapur Tohor dan Biaya Netralisasi Air Asam Tambang: Application of Linear Regression Equation to Predict Quicklime Needs and Acid Mine Water Neutralization Costs Kusdarini, Esthi; Atawolo, Yuliano; Putri, Fairus Atika Redanto
Jurnal Rekayasa Sipil dan Lingkungan Vol. 8 No. 2 (2024): Jurnal Rekayasa Sipil dan Lingkungan
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jrsl.v8i2.52075

Abstract

Abstract Acid mine drainage has the potential to pollute water bodies. One method of acid mine drainage treatment is neutralization using quicklime. This study aims to plan the dose of quicklime and estimate the cost of neutralizing acid mine drainage using a linear regression equation. Acid mine drainage samples were obtained from PT Bukit Asam. Neutralization experiments were carried out on a laboratory scale using variable doses of quicklime: 0.0759, 0.0971, 0.1460, 0.2965, and 0.3877 g/L. The results showed that the acid mine drainage samples contained parameters of pH 3.6, TSS 87 mg/L, Fe 1.1239 mg/L, and Mn 3.8333 mg/L. Neutralization of acid mine drainage using quicklime at a dose of 0.1460-0.2965 g/L was able to increase pH by 33-153% and decrease TSS by 2-94%, Fe by 24-87%, and Mn by 14-43%. The linear regression equation obtained is y = 13.707x + 4.103, where x is the dose of quicklime (g/L) and y is pH. Calculations using the linear regression equation produce a dose requirement of quicklime of 0.1383–0.3572 g/L to produce acid mine water with a pH of 6-9. Meanwhile, processing acid mine water with a discharge of 86,400 m³/day requires quicklime of 11,949-30,862.08 kg/day and costs of Rp10,156,650.00–26,232,700.00/day. Keywords: Acid mine drainage, quicklime, neutralization, linear regression Abstrak Air asam tambang berpotensi mencemari badan air. Salah satu metode pengolahan air asam tambang adalah netralisasi menggunakan kapur tohor. Penelitian ini bertujuan untuk merencanakan dosis kapur tohor dan memperkirakan biaya netralisasi air asam tambang menggunakan persamaan regresi linier. Sampel air asam tambang diperoleh dari PT Bukit Asam. Percobaan netralisasi dilakukan dalam skala laboratorium menggunakan variabel dosis kapur tahor : 0,0759; 0,0971; 0,1460; 0,2965; 0,3877 g/L. Hasil penelitian menunjukkan bahwa sampel air asam tambang mengandung parameter pH 3,6; TSS 87 mg/L; Fe 1,1239 mg/L; Mn 3,8333 mg/L. Netralisasi air asam tambang menggunakan kapur tohor dosis 0,1460-0,2965 g/L mampu menaikkan pH 33-153%; menurunkan : TSS 2-94%, Fe 24-87%, dan Mn 14-43%. Persamaan regresi linear yang diperoleh adalah y = 13,707x + 4,103; dengan x adalah dosis kapur tohor (g/L) dan y adalah pH. Perhitungan menggunakan persamaan regresi linear menghasilkan kebutuhan dosis kapur tohor sebesar 0,1383 – 0,3572 g/L untuk menghasilkan air asam tambang pH 6-9. Sedangkan untuk mengolah air asam tambang dengan debit 86.400 m3/hari membutuhkan kapur tohor sebesar 11.949-30.862,08 kg/hari dan biaya Rp 10.156.650,00 – 26.232.700,00/hari. Kata kunci: Air asam tambang, Kapur tohor, Netralisasi, Regresi linear
Study of Furrow Planting System in the Limestone Reclamation Area of PT. "X", East Java Province Fairus Atika Redanto Putri; Achmad Ar-Rasyid; Esthi Kusdarini
Nusantara Civil Engineering Journal Vol 5 No 1 (2026): Nusantara Civil Engineering Journal (January - June 2026)
Publisher : Civil Engineering Dept, Balikpapan State Polytechnics

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/nuce.v4i1.718

Abstract

The mining industry contributes significantly to economic development, but it also causes environmental impacts in the form of land degradation, particularly in limestone mining areas, which typically have very thin topsoil layers. This condition complicates the revegetation process and slows down the ecological recovery of the land. This study examines the strip planting system in the limestone mine reclamation area owned by PT X, East Java Province. The objectives of this study are to describe the technical stages of implementing the furrow planting system, describe the actual conditions of the furrow planting system implementation, compare the furrow planting system with the conventional system, and implement the furrow planting system on new land. The methods used are a combination of qualitative and quantitative approaches. Primary data required included soil quality, surrounding vegetation, planting distance, and row spacing, while secondary data required included WIUP data, RR documents, geological maps, plant height, plant diameter, and number of leaves. The results of the study show that the furrow planting system produces optimal teak growth compared to the conventional system. In addition to providing better vegetation growth, the furrow planting system has also been proven to be more efficient in the use of topsoil, requiring only 640 m3/Ha compared to 3000 m3 in the conventional system. Implementing this system on a new 3.2-hectare site is projected to require 2,306 trees and 2,234 m³ of topsoil, with seedlings sourced from stem cuttings. These results indicate that the ridge planting system is an effective and efficient method for supporting sustainable mine land reclamation.
Co-Authors ABD. MALIK Abubakar Tuhuloula Achmad Ar-Rasyid Achmad Maulidan Syahrie Adjie, Dwi Poetranto Waloejo Afrianti, Risa Agus Budianto Agus Budianto Angga Kusuma Wijaya Atawolo, Yuliano Atiyatussa'adah, Eva Avellyn Shinthya Sari Ayuni Rita Sari Ayunida Sasti, Sylvesiana Bagas Brillyant Umara Putra Bagus Dwi Susanto Bahar, Hendra Budiarto Budiarto Budiarto Budiarto Casimiro Orleans Martins Denis Rocky Pradana Desyana Ghafarunnisa Dwi Poetranto Waloejo Adjie Eka Nurohman Hadi Prasetyono Eka Rizky Ramadhani Erlinda Ningsih Erna Abinoam Kudmasa Fairus Atika Redanto Putri Febriyandi, Daniel Firdaus, Izza Achmad Firmansyah Fitri Nurmala Sade Flaminggo Gingga Freeda Inggrit Ulviandri Gingga, Flaminggo Hendro Nugroho Kudmasa, Erna Abinoam Kusuma Puti, Ratih Hardini Lakon Utamakno Mabuat, Imelda Srilestari Maritha Nilam Kusuma Nurul Lailatul Mahmudah Ongko Priambo Prasetyono, Eka Nurohman Hadi Priambo, Ongko Putra, Daniel Aries Putra, Resky Tri Putri Rizka Sania Putri, Fairus Atika Redanto Ratih Hardini Kusuma Puti Ratih Hardini Kusuma Putri Ratih Hardini Kusuma Putri Resky Tri Putra Sade, Fitri Nurmala Saleky, Dewy Belavista Salman Salman Sapto Heru Yuwanto Saputro, Alvito Nugroho Simone Morison Brilton Castelo Lay Umara Putra, Bagas Brillyant Utamakno, Lakon Yohana Winda Monica Yopianus, Benyamin Yudho Dwi Galih Cahyono