GROUNDWATER POLLUTION MODELING DUE TO CADMIUM FROM LEACHATE AROUND SUPIT URANG LANDFILL, MALANG CITY

• Main Author: Safrilla Kurnia Pangestu, Gifty
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik saniter dan perkotaan; teknik perlindungan lingkungan
• Online Access: https://digilib.itb.ac.id/gdl/view/61671
• Institution: Institut Teknologi Bandung

Indonesia's solid waste problem is a complex matter to be resolved, including the waste management which is still not up to standard. Landfill plays an important role in waste management but there are also bad effects that can be caused by this activity, one of which is leachate. One of the pollutants in leachate that is dangerous is cadmium, both for the environment and humans. This research takes the study area of Supit Urang landfill, Malang City, which is surrounded by residence with less than 500 meters. The minimum distance between TPA and residence according to SNI 19-2425-2002 is 500 meters, while according to the Minister of Public Works No. 3/2013 is 1 km Minister of Public Works Regulation No. 3/2013 states that a controlled landfill must use a liner with a thickness of 2 x 30 cm to minimize contamination due to leachate. This study predicts the pollution of cadmium around the Supit Urang landfill in the future and the maximum concentration of cadmium that can be transmitted so that the pollution is not too heavy, as well as identification of the importance of the liner in the landfill construction. Prediction is done through modelling using Visual MODFLOW software with scenarios that the liner working normally (as actual conditions) and scenarios if there is a failure in the liner. The model results show that heavy pollution will occur when the liner broken, especially when the transmitted cadmium concentration reaches 4.32 mg/L or more. From these results, it was also identified the impact of the pollution and designed a pollution control proposal by complying with the requirements for the use of a clay liner which is effective in reducing pollution 86-89% and doing leachate processing following the alternative in the Minister of Public Works Regulation No. 3/2013.