STUDY OF MINE WATER TREATMENT USING ALUMINIUM BASED COAGULANT IN LABORATORY

• Main Author: Lanang Sanjivani (NIM : 12114059), Dek
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/26463
• Institution: Institut Teknologi Bandung

Mining activities are characterized by excavation and dumping activities. These activities can cause exposure to rock components into the water so that the water becomes turbid. Long lasting water turbidity is caused by suspended solids that cannot mechanically settle, so it needs to be processed using certain chemicals in the form of coagulants to accelerate settle down TSS. The purpose of this study is to determine the maximum dose of coagulant addition to settle down TSS by considering the condition and location of the sampling. The water resulted by the addition of the coagulant is compared with the paramaters of the quality standard for wastewater as stated in Peraturan Gubernur Kalimantan Selatan Nomor 36 Tahun 2008 and Peraturan Pemerintah Nomor 82 Tahun 2001 kelas 2. <br /> <br /> The initial step is to test the initial water characteristics with physical test parameters: pH, Oxidation Reduction Potential (ORP), Electrical Conductivity (EC), Total Dissolved Solids (TDS), Total Suspended Solids (TSS), turbidity, settleable solids and chemical test parameters: Induced Coupled Plasma – Mass Spectometry (ICP-MS) and Ion Chromatograph (IC). And then, jar test was conducted to determine the maximum dose of coagulant to precipitates TSS. The maximum dose is determined based on the results of the final water quality test with physical parameters: pH, TSS, turbidity and chemical parameters: ICP-MS and IC. <br /> <br /> From the results of the initial water characteristics test, obtained TSS value of 268 mg/L which has not met the quality standard of waste water. From the jar test results, it was found that the maximum dose of alum is 20 mg/L and PAC is 15 mg / L with final TSS value is <2,5 mg/L. Coagulant needs in average rainfall is 118.3 ton/year for alum and 88.7 ton/year for PAC. Recommended dimension of settling pond is with total volume of 900 m3 and storage volume of 633 m3 so that it requires length of 35 m, width of 11 m, total depth of 4 m and storage depth of 3 m. <br />