Optimalisasi Pengolahan Air Limbah Regenerasi Ion Exchange Pada Karbon Dioksida Removal Plant Subang

Abstract

Regenerasi resin ion exchange menghasilkan air limbah dalam bentuk residu regeneran kimia asam kuat dan basa kuat, dengan konsentrasi zat terlarut tinggi. Penelitian bertujuan untuk memodifikasi kolam netralisasi guna mengoptimalkan pengolahan air limbah hasil regenerasi resin ion exchange. Hasil analisis menunjukkan beberapa parameter melebihi baku mutu, seperti pH, TSS, TDS, COD, dan Sulfat. Metode analisis pemilihan teknologi tepat guna yang digunakan adalah Weighted Sum Model (WSM). Unit yang dirancang meliputi prasedimentasi, netralisasi dan presipitasi, Biological Aerated Filter (BAF), adsorpsi, serta penampung akhir. Kadar air lumpur hasil pengolahan diturunkan melalui Sludge Drying Bed (SDB). Hasil pengolahan air limbah telah memenuhi baku mutu PP No. 22 Tahun 2021 Kelas IV, yang ditunjukkan oleh pH yang telah netral serta konsentrasi COD sebesar 23,60 mg/L, TDS sebesar 695,29 mg/L, TSS sebesar 22,59 mg/L, dan sulfat sebesar 207,09 mg/L yang berada di bawah baku mutu yang ditetapkan. Estimasi biaya modifikasi kolam netralisasi sebesar Rp 138.971.800.

Ion exchange resin regeneration produces wastewater in the form of chemical regenerant residues of strong acids and strong bases, with high solute concentrations. The study aimed to modify the neutralization pond to optimize the treatment of wastewater resulting from ion exchange resin regeneration. The analysis results showed that several parameters exceeded quality standards, such as pH, TSS, TDS, COD, and sulfate. The analysis method used for selecting appropriate technology was the Weighted Sum Model (WSM). The designed units included pre-sedimentation, neutralization and precipitation, Biological Aerated Filter (BAF), adsorption, and final storage. The moisture content of the processed sludge was reduced through Sludge Drying Bed (SDB). The wastewater treatment results met the quality standards of Government Regulation No. 22 of 2021 Class IV, as indicated by a neutral pH and COD concentrations of 23.60 mg/L, TDS of 695.29 mg/L, TSS of 22.59 mg/L, and sulfate of 207.09 mg/L, all below the established quality standards. The estimated cost of modifying the neutralization pond is IDR 138,971,800.