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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Jurnal Teknik Kimia USU
Fadhila Fadhila
Universitas Sumatera Utara
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Education Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Pengolahan Lindi TPA Muara Fajar Pekanbaru Menggunakan Sequencing Batch Reactor Aerob dengan Variasi Teknik Stabilisasi (IDLE) Ferdy Ashari Syawal; Shafira Dinil Fitri; Lita Darmayanti; David Andrio; Munir Tanjung; Fadhila Fadhila
Jurnal Teknik Kimia USU Vol. 15 No. 1 (2026): Jurnal Teknik Kimia USU
Publisher : Talenta Publisher (Universitas Sumatera Utara)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jtk.v15i1.23407

Abstract

Leachate is a liquid generated from waste decomposition containing organic matter, ammonia, heavy metals, and suspended solids in high concentrations. Improper leachate disposal can pollute soil and water around the landfill. This study aims to determine the effect of different idle stabilization techniques on COD, ammonia, and TSS removal efficiency using an aerobic Sequencing Batch Reactor (SBR). Three idle variations were tested: static idle, mixed idle, and aerated idle. The SBR reactor was operated with fill (1 h), react (18 h), settle (2 h), draw (1 h), and idle (2 h) phases for four cycles. The results showed that the aerated idle variation achieved the highest removal efficiencies: COD 86.67%, ammonia 95.36%, and TSS 93.97%. Aerated idle provided better sludge stability and optimal oxygen conditions for microbial activity.
Optimizing Sustainable Wastewater Treatment: Kinetic and Parametric Study of Methylene Blue Removal Using Electrocoagulation Amir Husin; Dermala Tito A; Fadhila Fadhila; Lies Setyowati; Deny Supriharti
Jurnal Penelitian Pendidikan IPA Vol 12 No 6 (2026)
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v12i6.15127

Abstract

This study investigates the removal of Methylene Blue (MB) from synthetic wastewater using a batch electrocoagulation (EC) reactor with two pairs of parallel monopolar iron electrodes, directly supporting Sustainable Development Goal 6 (Clean Water and Sanitation). Operational parameters, including initial pH, inter-electrode distance, applied voltage, and electrolysis time, were systematically evaluated. Within 15 minutes of electrolysis, a color removal efficiency of over 80% was achieved at an applied voltage of 10 V and an inter-electrode distance of 5 mm. Treatment efficiency decreased to 60.13% when the inter-electrode distance was widened to 10 mm due to increased cell resistance. Conversely, increasing the voltage from 10 V to 20 V and 30 V significantly enhanced the process efficiency. The MB removal rate was validated using a mass transfer-based kinetic model solved via the 4th-order Runge-Kutta method. The model aligned well with experimental data, displaying a Sum of Squared Errors (SSE) range of 0.09 to 193.57. At an extended electrolysis time of 75 minutes, the average efficiency reached 92.04% across all voltage variations, proving that coagulant saturation overcomes mass transfer limitations.
Co-Authors Amir Husin David Andrio Deny Supriharti Dermala Tito A Ferdy Ashari Syawal Lies Setyowati Lita Darmayanti Munir Tanjung Shafira Dinil Fitri