Optimization of Alum Coagulant Dosage Using a Modified Jar Test Method for TDS and Turbidty Reduction in Shrimp Aquaculture Wastewater

Lady Ayu Sri Wijayanti; Mochhamad Ikhsan Cahya Utama; Galih Hamdani; Andini Nur Afifah

doi:10.55927/eajmr.v5i6.183

Authors

Lady Ayu Sri Wijayanti Padjadjaran University
Mochhamad Ikhsan Cahya Utama Padjadjaran University
Galih Hamdani Padjadjaran University
Andini Nur Afifah Padjadjaran University

DOI:

https://doi.org/10.55927/eajmr.v5i6.183

Keywords:

Alum coagulation, Modified jar test, Shrimp aquaculture wastewater, TDS reduction, Sweep coagulation

Abstract

This study aims to optimize the dosage of alum coagulant (Al₂(SO₄)₃) to reduce Total Dissolved Solids (TDS) levels and improve the visual quality of shrimp aquaculture wastewater. The evaluation was conducted using a modified Jar Test with dosage variations of 0 g, 5 g, 10 g, and 15 g per 500 mL sample, applying a Completely Randomized Design (CRD). The ANOVA results indicated that the coagulant dosage had a highly significant effect (p<0,05) on reducing pH and TDS. The 15 g dosage was determined as the optimal point that triggers the sweep coagulation mechanism, proven to drastically reduce TDS from ~2000 mg/L to 1320 mg/L and improve water clarity. Conversely, the application of sub-optimal dosages actually increased TDS due to the accumulation of free ions. This approach is effective for controlling the pollution load of aquaculture effluents.

References

El-Bacha, R., Salhi, A., Abderrafia, H., & Rabi, S. (2024). Water treatment: Aluminum sulfate, polymer, and activated carbon between efficacy and overdosing. Case of Oum Er-Rbia River, Morocco. Desalination and Water Treatment, 317, Article 100273. https://doi.org/10.1016/j.dwt.2024.100273.

Farasat, Z., Panahi, R., & Mokhtarani, B. (2017). Timecourse study of coagulation-flocculation process using aluminium sulfate. Water Conservation and Management, 1(2), 7–9.

Gaspersz, V. (1991). Experimental design methods. Armico.

Goto, G. M., Corwin, E., Farthing, A., Lubis, A. R., & Klinger, D. H. (2023). A nature-based solutions approach to managing shrimp aquaculture effluent. PLOS Sustainability and Transformation, 2(8), Article e0000076. https://doi.org/10.1371/journal.pstr.0000076.

Karunarathna, R. H., Kanchana, M. S., & Nanayakkara, N. (2025). Optimizing the coagulation dose considering multi factors: A design of experiment approach. Journal of Applied Science & Process Engineering, 12(2), 219–232. https://doi.org/10.33736/jaspe.11048.2025.

Lala, L. S., Adiono, M., Suaebah, E., & Rohmawati, L. (2025). Analisis penambahan dosis aluminium sulfat terhadap pH air dengan metode jar-test di PT. Hanarida Tirta Birawa [Analysis of adding aluminum sulfate dosage to water pH using the jar-test method at PT. Hanarida Tirta Birawa]. Inovasi Fisika Indonesia, 14(1), 27–32. https://doi.org/10.26740/ifi.v14n1.p27-32.

Lin, J.-L., Huang, C., Chin, C.-J. M., & Pan, J. R. (2008). Coagulation dynamics of fractal flocs induced by enmeshment and electrostatic patch mechanisms. Water Research, 42(17), 4457–4466. https://doi.org/10.1016/j.watres.2008.07.043.

Malik, Q. H. (2018). Performance of alum and assorted coagulants in turbidity removal of muddy water. Applied Water Science, 8, Article 40. https://doi.org/10.1007/s13201-018-0662-5.

Mortadi, A., Mghaiouini, R., Elmelouky, A., Chahid, E., Hairch, Y., Saifaoui, D., Monkade, M., Cherkaoui, O., & El Moznine, R. (2022). New approach to investigate and to monitor the coagulation process during wastewater treatment. Materials Today: Proceedings, 66(Part 1), 325–328. https://doi.org/10.1016/j.matpr.2022.05.424.

Nurjanah, F. L., Cahyonugroho, O. H., & Novembrianto, R. (2026). Analysis of aluminum sulfate dosage on water quality parameters in the coagulation-flocculation process. Media Ilmiah Teknik Lingkungan (MITL), 11(1), 8–15. https://doi.org/10.33084/mitl.v11i1.11181.

Reynolds, T. D., & Richards, P. A. (1996). Unit operations and processes in environmental engineering (2nd ed.). PWS Publishing Company.

Tahraoui, H., Toumi, S., Boudoukhani, M., Touzout, N., Sid, A. N. E. H., Amrane, A., Belhadj, A.-E., Hadjadj, M., Laichi, Y., Aboumustapha, M., Kebir, M., Bouguettoucha, A., Chebli, D., Assadi, A. A., & Zhang, J. (2024). Evaluating the effectiveness of coagulation–flocculation treatment using aluminum sulfate on a polluted surface water source: A year-long study. Water, 16(3), Article 400. https://doi.org/10.3390/w16030400.

Wahyudin, H. K. (2022). Optimalisasi dosis aluminium sulfat dalam metode jar test pada IPA di PDAM Tirta Prabujaya Kota Prabumulih [Optimization of aluminum sulfate dosage in the jar test method at WTP of PDAM Tirta Prabujaya, Prabumulih City]. Jurnal Kolaboratif Sains, 5(12), 819–825.