<![CDATA[Acid mine drainage (AMD) is one of the negative impacts of mining activities that can significantly reduce environmental quality due to its low pH and high concentration of dissolved heavy metals. Therefore, proper and effective treatment is required before the water is discharged into the surrounding environment. This study aims to analyze the management of acid mine drainage using an active treatment method with quicklime (CaO) and to determine the appropriate dosage required at KPL 18 Stockpile of RMKO (RMKO), Muara Enim Regency. The research methods include field observations and data collection consisting of primary data such as pH, water discharge, pond volume, and lime dosage, as well as secondary data including location maps and rainfall data. Data analysis was carried out through pH measurements at the inlet and outlet channels and supported by jar test experiments to evaluate the effectiveness of lime addition. The results indicate that the pH values at the inlet range from 4.41 to 4.47, while at the outlet they range from 7.81 to .94, which comply with environmental quality standards (pH 6–9). The treatment process involves water flow through channels, processing in settling ponds with the addition of quicklime , followed by discharge into receiving water bodies. The use of quicklime has proven effective in increasing pH and facilitating the precipitation of dissolved metals, indicating that this method is efficient and applicable for AMD management.]]>
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