Coagulation Using Coagulant Combined from Peat Clay Soil and Alum in Removal of Color in Peat Water
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Peat Water, Coagulation, Combined Coagulant, Tanah Lempung Gambut (TLG), Aluminum Sulfate
Abstract
Peat water generally has a low pH, high organic matter, and a concentrated color with different characteristics depending on its place of origin. The coagulation process can be carried out with Peat Clay Soil (PCS), available in abundance in South Kalimantan. Optimizing the coagulation process using a combined coagulant of PCS and alum has the potential to overcome the shortcomings of both compounds and accelerate the treatment process. This study aims to analyze the effect dosage of PCS and alum combined coagulant in removing color from peat water. The coagulation process used the Jar-Test method. The UV-Vis spectrophotometry method is used to test color (UV456) in PtCo standards. The peat water sample was taken from the Gambut sub-district, while the PCS sample was collected from the Tapin sub-district. The initial characteristics of the peat water were pH 5.39, color value 76.58 PtCo, and E4/E6 ratio 4.78. The best operating condition is a 1-stage coagulation process with a peat water pH of 9, PCS coagulant dosage of 2 g/L, and alum coagulant dosage of 0.15 g/L capable of removing 96.04% color at 3.04 PtCo, 81.48% organic matter, E4/E6 ratio of 2.50, and final pH of 4.04.
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