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Irfan Purnawan Purnawan
Universitas Muhammadiyah Jakarta
Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Nursing Public Health Social Sciences

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Journal : Journal of Applied Sciences and Advanced Technology

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OPTIMIZING OPERATING PARAMETERS AND POLYACRYLIC ACID ANTISCALANT DOSAGE IN A REVERSE OSMOSIS UNIT M Khoirul Ummam; Irfan Purnawan; Nurul Hidayati Fithriyah
Journal of Applied Sciences and Advanced Technology Vol. 8 No. 2 (2025): Journal of Applied Science and Advanced Technology
Publisher : Faculty of Engineering Universitas Muhammadiyah Jakarta

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Abstract

Reverse osmosis (RO) technology is one of the most widely used and highly effective filtration technologies. RO membranes generally act as barriers to dissolved salts and inorganic compounds, as well as organic molecules witmolecular weights greater than 100 angstroms. Several factors influence the rate of mineral scale formation on the surface of RO membranes, including lower temperatures, which reduce mineral scale solubility, and higher feedwater conductivity or Total Dissolved Solids (TDS), which increase the solubility of slightly soluble salts. This phenomenon is caused by increased ionic interference during the nucleation and crystallization processes of various types of scale. Mineral scaling remains a critical challenge in reverse osmosis (RO) systems, limiting recovery and increasing operational costs. This study optimizes polyacrylic acid (PAA) antiscalant dosage and system recovery in a 120 m³/h industrial BWRO (brackish water reverse osmosis) plant treating water with 20–40 ppm Ca-hardness. Dosages of 3–13 ppm and recoveries of 49–75% were evaluated based on normalized permeate flow (NPF) decline and feed pressure increase, targeting <10% performance loss. Results show that a dosage of 11–13 ppm at 74–75% recovery maintains membrane performance with less than 6.5% NPF decline and minimal pressure increase (below 1.64%) over a production volume of 6,500 m3. Statistical validation (R² > 0.96, p < 0.05) confirms the significance of these parameters, while Hyd-RO-Dose simulations support calcite saturation control. These findings provide a practical, validated framework for optimizing RO operation by enhancing efficiency and reducing fouling, as well as antiscalant dosing in industrial settings.
Co-Authors Alvika Meta Sari Andi Prabowo Arie Pratama Putra Athiek Sri Redjeki Chabane, Mustapha Darmi, Hedro Dina Mariana Erdawati Erdawati Erdawati Erdawati Fachri Azmi Fajri Afriliono Fatma Sari Ferrah, Nacer Fitriani, Mutia Gema Fitriyano, Gema Gita Desinta Haris Isyanto Heni Suryarachma Ismiyati Ismiyati Ismiyati, Ismiyati Jaharuddin, Jaharuddin Jumail Jumail M Khoirul Ummam Mansour, Riad Marsela, Anis Mega Andini Melkaoui, Chikh Meri Prasetyawati Nurul Hidayati Fithriyah Nurul Hidayati Fithriyah Pradhini Nur Arifin, Pradhini Nur Rahmawati, Astri Rahmita Nurul Muthmainnah Ramadhan, Raihan Fajar Reza Bayu Pratama Ricky Andi Permana Rita Dewi Risanty Rizki Budi Ramadhani Rully Mujiastuti Salfichotullaila, Tiara Sancka Stella G. Sihura Sari, Fatma Sari, Irma Permata Shabrina, Alifira Fajriatu Sri Rachmawati Sugono Sugono Susanty Susanty Syamsudin AB Syamsudin Ab, Syamsudin Ummul Habibah Hasyim Yudistirani, Sri Anastasia Zahouane, Fadila Zulfa Rachdianti