Evaluasi Efektifitas Pengaruh Dosis Koagulan dan Flokulan terhadap TSS dan pH Limbah Cair Stockpile Pembangkit Listrik Tenaga Uap

Dea Raivani Claresta Hamzah; Restu Hikmah Ayu Murti; Yubi Fatroh Harianto

doi:10.61132/venus.v3i6.1241

Authors

Dea Raivani Claresta Hamzah Universitas Pembangunan Nasional “Veteran” Jawa Timur
Restu Hikmah Ayu Murti Universitas Pembangunan Nasional “Veteran” Jawa Timur
Yubi Fatroh Harianto Universitas Pembangunan Nasional “Veteran” Jawa Timur

DOI:

https://doi.org/10.61132/venus.v3i6.1241

Keywords:

Coagulation, PAC, pH, Stockpile Wastewater, TSS

Abstract

This study aims to evaluate the effectiveness of various doses of 6.25% Poly Aluminium Chloride (PAC) and 0.1% polymer flocculant in reducing Total Suspended Solids (TSS) and assessing pH changes in coal stockpile wastewater at PT PLN Nusantara Power UP Paiton Unit 9. Stockpile wastewater typically contains high levels of suspended solids originating from water spray activities that carry fine coal particles. The coagulation–flocculation process was performed using the jar test method with PAC dosages of 35 ppm, 50 ppm, and 65 ppm, along with flocculant dosages of 6 ppm and 7 ppm. pH and TSS were analyzed before and after treatment to assess process effectiveness. The results indicate that a PAC dosage of 35 ppm combined with a 6 ppm flocculant achieved the highest TSS removal efficiency of 98.15%. Increasing PAC dosage resulted in reduced performance due to overdosing effects, leading to charge destabilization and impaired floc formation. These findings highlight the importance of optimizing coagulant dosage to improve stockpile wastewater quality for safe reuse in operational activities.

References

Bahctiar, F. E., & Putro, R. K. H. (2022). Pemantauan dan optimasi instalasi pengolahan air limbah unit lamella clarifier dengan penentuan dosis koagulan dan flokulan. Indonesian Journal of Applied Science and Technology, 3(1), 76–88.

Binnie, C., Kimber, M., & Smethurst, G. (2002). Basic water treatment. Royal Society of Chemistry.

Dewi, D. R. K., Kusumawati, E., Fadjri, R. W., & Nabiha, F. S. (2025). Optimisasi proses koagulasi-flokulasi untuk meningkatkan kualitas air limbah limpasan batubara. Jurnal Serambi Engineering, 10(4), 1–12.

Hasan, R., & Khoirunnisa, A. (2024). Efektivitas koagulan aluminium sulfat dan poly aluminium chloride (PAC) pada pengolahan limbah cair B3 PT X. Jurnal Warta Akab, 48(1), 5–14.

Hutabarat, D. M., Witasari, W. S., & Baskoro, R. (2023). Pengaruh jenis koagulan dan variasi pH terhadap kualitas limbah cair di instalasi pengolahan air limbah industri. DISTILAT: Jurnal Teknologi Separasi, 8(3). https://doi.org/10.33795/distilat.v8i3.464

Isuluqi, A. I. C., Sa’diyah, K., & Nabil, E. (2025). Pengolahan limbah cair pada coal stockpile dengan metode koagulasi. DISTILAT: Jurnal Teknologi Separasi, 11(1), 131–140. https://doi.org/10.33795/distilat.v11i1.6924

Linggasari, S. (2023). Instalasi pengolahan limbah cair di stockpile batubara PT X. Jurnal Teknologi Pertambangan, 8(2), 85–94.

Nisa, N. I. F., & Aminudin, A. (2019). Pengaruh penambahan dosis koagulan terhadap parameter kualitas air dengan metode jartest. JRST (Jurnal Riset Sains dan Teknologi), 3(2), 61–67. https://doi.org/10.30595/jrst.v3i2.4500

Nor, A., Muttaqin, I., & Trianiza, I. (2020). Optimalisasi dosis koagulan dan peningkatan kinerja PAC (poly aluminium chloride) dengan penambahan kaustik soda dalam proses pengolahan air bersih di PDAM Bandarmasih Kota Banjarmasin menggunakan metode jar test. Journal of Industrial Engineering and Operation Management, 3(2), 2–6. https://doi.org/10.31602/jieom.v3i2.4254

Ramadhan, A. A. N., Ramli, M., & Hatta, A. A. (2022). Optimasi penggunaan dosis koagulan alum dan poly aluminium chloride (PAC) dalam pengelolaan limbah cair batubara. Jurnal Penelitian Enjiniring. https://doi.org/10.25042/jpe.052022.01

Reinke, E. A. (1951). Water quality and treatment. American Journal of Public Health and the Nations Health, 41(9), 1131–1132. https://doi.org/10.2105/ajph.41.9.1131-b

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

Ridwan, M. T., Nahar, N., Irwan, I., & Hasanah, U. (2025). Application of the coagulation jar test method for the treatment of coal wastewater in industrial wastewater management. Jurnal Teknologi.

Sheng, D. P. W., Bilad, M. R., & Shamsuddin, N. (2023). Assessment and optimization of coagulation process in water treatment plant: A review. ASEAN Journal of Science and Engineering, 3(1), 79–100. https://doi.org/10.17509/ajse.v3i1.45035

Zarei Mahmudabadi, T., Ebrahimi, A. A., Eslami, H., Mokhtari, M., Salmani, M. H., Ghaneian, M. T., Mohamadzadeh, M., & Pakdaman, M. (2018). Optimization and economic evaluation of modified coagulation–flocculation process for enhanced treatment of ceramic-tile industry wastewater. AMB Express, 8(1), Article 89. https://doi.org/10.1186/s13568-018-0702-4