PEAT WATER FILTRATION WITH SULFONATED POLYPROPYLENE ULTRAFILTRATION MEMBRANE

• Main Author: Rachel Anaya Br Pasaribu, Putri
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/86205
• Institution: Institut Teknologi Bandung

Clean water is a vital necessity that continues to increase with population growth. Indonesia, with its extensive peatland, has significant potential for utilizing peat water as a source of clean. However, peat water contains high levels of organic compounds and cannot be used directly without treatment. This study aims to analyze the effect of operating pressure on the performance of sulfonated polypropylene ultrafiltration membranes, evaluate the performance of these membranes in treating peat water, and assess the effectiveness of backwashing with distilled water and 0.1% NaOH solution in membrane recovery. Ultrafiltration membranes were chosen for their ability to separate large particles and organic compounds at relatively low operating pressures. Polypropylene (PP) membranes were selected due to their chemical and mechanical stability, affordability, and widespread availability. To enhance the efficiency of PP membranes, which are less effective in removing organic substances from peat water, the membranes were modified through sulfonation in 98% H?SO? solution. This study analyzed the quality of permeate water at pressures of 0.4 bar, 0.6 bar, 0.8 bar, and 1 bar, and compared the effectiveness of backwashing with distilled water and 0.1% NaOH on both sulfonated and non-sulfonated membranes. The results of the study indicate that increasing the pressure enhances both the flux and volume of water, but reduces the effectiveness of membrane treatment. The sulfonated polypropylene ultrafiltration membrane at 0.4 bar provided the best permeate quality, with reductions in turbidity (94%), conductivity (46%), COD (41%), permanganate index (72%), and color (93%). Compared to non-sulfonated membranes at the same pressure with reductions in COD and permanganate index of 41% and 48%, respectively. Additionally, backwashing with 0.1% NaOH showed better effectiveness than distilled water, with permeabilities of 81.879 L/m².h.bar and 127.41 L/m².h.bar, respectively.