Municipal solid waste material flow in Bali Province, Indonesia

A study of waste material flow was carried out in Bali Province to define, evaluate, and analyse the existing condition of waste management as a reference for improving solid waste services. In this paper, waste quantity in every chain of waste management was measured. Waste sampling, observation, and interviews were also conducted to build the material flow model. Around 4.2 million residents and 4.9 million tourists yearly generate waste of up to 822,555 tonnes/year, which is dominated by organic waste for around 65% ww (wet weight) and plastic waste for around 15.67% ww. Around 200,718 tonnes/year (24.40% ww) of waste is transported directly to the landfills and 235,418 tonnes/year (28.62% ww) is collected first at the transfer depos, before being transported to the landfill. As much as 39,566 tonnes/year (4.81% ww) of waste enters the 3R-Transfer Depo for recycling and around 47,030 tonnes/year (5.72% ww) enter the waste bank. Furthermore, due to the lack of integrated waste management, around 283,369 tonnes/year (34.45% ww) waste is illegally dumped into the environment. In the end, up to 444,679 tonnes/year (54.06% ww) of waste is processed in ten landfills which serve Bali Province.