RISK ASSESSMENT AND REHABILITATION POTENTIAL OF MUNICIPAL SOLID WASTE LANDFILLS IN BALI PROVINCE, INDONESIA

As the final stage of waste management, the landfill has long been a focal point. Yet, the operation does not go in accordance with approved regulation which results in polluting. In response to that, Integrated Risk-Based Approach (IRBA) was conducted. IRBA is a decision-making method in closing and rehabilitation of open dumping through environmental risk assessment. Evaluated aspects on IRBA comprise of the technical aspect, environmental impact, and social aspect (particularly impact for society). Considered parameters in IRBA analysis are categorized into three which are: location (20 parameters), waste (4 parameters), and leachate (3 parameters). This research is focused on the risk index of a landfill in Bali Province which covers 10 landfills spread in Bali Province. Two of them are Regional landfill which is Sarbagita Regional landfill and Bangli Regional landfill; the others are City/Regency landfill which includes Bengkala landfill, Temesi landfill, Peh landfill, Linggasana landfill, Sente landfill, Jungut Batu landfill, Biaung landfill, and Mandung landfill. The higher the risk index, the higher the risk of polluting the environment which implies the need for further action, either by closing or rehabilitating the landfill. The highest risk index reached in Bali Province is 664.8 by Sarbagita Regional landfill and the lowest is 420.7 by Bangli landfill.