DOSIS OPTIMUM KOAGULAN TAWAS (Al2(SO4)3) DENGAN AERASI PADA PROSES PENGOLAHAN AIR WADUK KRENCENG
Daftar Isi:
- Water needs is getting higher for drinking, washing and industrial purposes, especially in Cilegon. The biggest source to fulfill those needs is by utilizing treatment from Krenceng reservoir water. This research was conducted using the Coagulation-Flocculation method with Aeration pretreatment. The coagulant used is alum. Coagulants have performance in accordance with optimum pH conditions. Therefore, it is necessary to conduct an experiment regarding the optimization of the Coagulant Dose, pH and Aeration on the performance of the Alum Coagulant in the raw water of the Krenceng reservoir. The purpose of this research was to determine the optimization of pH, coagulant and flocculant doses in Kremeng reservoir water with the addition of aeration The procedure of this research was carried out by measuring pH, TDS, Fe content, and initial Mn levels of the raw water of the Krenceng reservoir, then aeration for 30 minutes and adding alum coagulants with variations of 15, 20, 25 ppm which were stirred at a speed of 100 rpm for 2 minutes and addition of flocculants with a variation of 1.2.3 ppm with a slow stirring of 40 rpm for 20 minutes. The sedimentation time is 20 minutes. Then analyze the pH, TDS, Fe and Mn contents of each sample. The results of this research can be concluded that the best optimum dosage for Krenceng reservoir raw water treatment is at pH 7 with 25 ppm alum coagulant, 2 ppm cation flocculant, and the final Fe content is 0.06 mg / l, final Mn content is less of 0.5 mg / l and a final pH of 5.6 which the initial conditions of raw water have a Fe content of 1.13 mg / l, an Mn content of 0.86 mg / l, a pH of 7.2 and a TDS of 45. Keyword: Coagulant, Coagulation, Flocculation