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Tuhu Agung Rachmanto
Universitas Pembangunan Nasional Veteran Jawa Timur
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Analisis Pengaruh Debit dan Dosis FeSO4 Terhadap Penghilangan Cr6+ Pada Sistem Pengolahan Air Limbah Industri Pertambangan Nikel Reonald Adhi Wibowo; Tuhu Agung Rachmanto
Environmental Engineering Journal ITATS Vol 6, No 1 (2026): Environmental Engineering Journal ITATS
Publisher : Teknik Lingkungan, Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.envitats.2026.v6i1.8420

Abstract

This study aims to analyse the relationship between flow rate and FeSO₄ dosage on the amount of Cr⁶⁺ load treated in a nickel mining wastewater treatment system. Data was obtained from seven Sediment Ponds (SDPs) operating in the mining area. The parameters analysed included flow rate (m³/day), actual FeSO₄ dosage (kg/day), and influent and effluent Cr⁶⁺ loads (kg/day). The treated Cr⁶⁺ load was calculated from the difference between the influent and effluent loads at each SDP. Correlation and regression analyses were used to examine the operational trends between variables. The results showed that the flow rate had a linear relationship with the treated Cr⁶⁺ load because the load parameter was mathematically dependent on the flow rate. The FeSO₄ dosage showed a strong positive relationship with the treated Cr⁶⁺ load, reflecting the operational adjustment between coagulant requirements and pollutant load. These findings provide a technical overview that the proportional adjustment of flow rate and chemical dosage is an important aspect in the effectiveness of the Cr⁶⁺ reduction process in mine wastewater treatment systems.
Pengaruh Variasi Kerapatan Draft Tube Terhadap Karakteristik Hidrodinamika dan Kinerja Airlift Reactor Dalam Penyisihan Besi (Fe) dan Mangan (Mn) Brigitta Ardiana Diva Azzahra; Tuhu Agung Rachmanto
Jurnal Serambi Engineering Vol. 11 No. 3 (2026): Juli 2026
Publisher : Faculty of Engineering, Universitas Serambi Mekkah

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Abstract

Besi (Fe) dan mangan (Mn) merupakan parameter yang perlu diperhatikan dalam pengolahan air tanah karena konsentrasinya dapat melebihi baku mutu dan keberadaannya dalam bentuk terlarut memerlukan proses oksidasi untuk dapat dipisahkan. Airlift reactor (ALR) merupakan salah satu reaktor yang dapat digunakan dalam proses aerasi, dimana kinerjanya dipengaruhi oleh karakteristik hidrodinamika di dalam reaktor. Penelitian ini bertujuan menganalisis pengaruh variasi kerapatan wire mesh draft tube terhadap karakteristik hidrodinamika dan kinerja ALR dalam penyisihan Fe dan Mn. Penelitian dilakukan secara eksperimen dan simulasi Computational Fluid Dynamics (CFD) dengan variasi kerapatan draft tube 0 mm, 3 mm, dan 5 mm. Hasil pengukuran pada eksperimen menunjukkan bahwa peningkatan ukuran kerapatan draft tube meningkatkan oksigen teralut (DO) dari 6,50 mg/L menjadi 6,80 mg/L. Efisiensi penyisihan Fe meningkat dari 90,14% menjadi 96,56%, sedangkan penyisihan Mn meningkat dari 79,51% menjadi 86,07%. Hasil simulasi CFD menunjukkan bahwa peningkatan ukuran kerapatan draft tube menghasilkan distribusi pola aliran yang lebih merata dan meningkatkan gas holdup simulasi dari 0,0050 menjadi 0,0069. Hasil tersebut menunjukkan bahwa variasi draft tube 5 mm menghasilkan kondisi hidrodinamika dan aerasi yang paling mendukung penyisihan Fe dan Mn.
Co-Authors Acbellita Ayu Zevhiana Aulia Ulfah Farahdiba Azzahra Hanggararas Sasdika Brigitta Ardiana Diva Azzahra Enrico Gianpratama Latuhihin Luh Asri Ningsih Widhi Nurjaya Marco Dwi Laksono Nanda Henik Pratiwi Naniek Ratni Juliardi A.R Nicken Elok Arohmah Reonald Adhi Wibowo Rizaldi Putra Pratama RR. Vira Eryka Kusumaningrum Slamet Wahyu Hidayat Yayok Suryo Purnomo