ANALYSIS OF SEDIMENTATION PROCESS FROM MIXING HIGH SUSPENDED SOLIDS (TSS) OF MINE WATER AND ACID MINE DRAINAGE ON LABORATORY SCALE

• Main Author: Christy Dyestiana, Dian
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/70725
• Institution: Institut Teknologi Bandung

High suspended solid of mine water (HTSS) and acid mine drainage (AMD) which is generated from disturbed area in mining whose contaminant effect to be managed. On the other hand, AMD has a coagulant potential due to its particular characteristic that contain high aluminum (Al) and iron (Fe) concentration as basic constituent of coagulant. Mixing HTSS and AMD in an optimum ratio could enhance TSS removal and pH improvement. However, the coagulation performance of AMD is distinct and site typical. Therefore, the purpose of this research is conducted to determine the optimum mixing ratio and post mixing of HTSS and AMD characterization. The hypothesis of this study is stated that sedimentation of HTSS and AMD mixture in the optimum ratio is affected by pH improvement and TSS removal which has a positive correlation with zeta potential improvement and contributed by domination of Al+3 in the reaction of sedimentation. The simulation of mixing is conducted by Jar test method according to SNI 19-6449- 2000 and Imhoff cone test as APHA (2005) No. 2540 F with designed mixing ratio, i.e. 9:1, 7:1, 4:1, 3:1, 2:1, 1:1, 1:2, 1:3, 1:4, 1:7, and 1:9. The simulation would be compared to modelling simulation using a PHREEQC software. The initial characterization of HTSS indicate the neutral mine drainage (NMD) with Sodium bicarbonate (Na-HCO3-) of water type while AAT is Calsium magnesium sulphate (Ca-Mg-SO4-2). The simulation result shows that the most optimum of mixing ratio HTSS:AAT is 1:1. The result is considered by selecting the TSS removal in a compliance of pH and dissolved metal concentration, also complemented by the observation of zeta potential and sedimentation capability. The geochemical factors that contribute in sedimentation reaction is cation whose high ionic strength force and its influence to adsorption mechanism, alkalinity, and sulphate. In conclusion, the result emphasizes the positive correlation that verify and complement the hypothesis statement.