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

Abstract

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.