Indonesia is a tropical country and has abundant varieties of plants but has not been utilized to the
fullest. One of the plants that are often encountered in the community is Cerbera Manghas. Cerbera
Manghas is known as one of the trees that have solid roots thus it is widely used for greening both on the
roadside on the highway and residential areas in Surabaya. Although beneficial to be a shading tree and to
reduce air pollution in urban areas, waste from the leaves of this plant becomes a serious issue for the
cleanliness of the city. Organic solid waste that comes from the falling leaves has the potential to be used as
a solid fuel alternative in the form of briquettes when processed appropriately. This study aims to investigate
the potential of waste Cerbera Manghas leaves to be used as raw material of biomass briquettes with tapioca
as a binder, as well as to evaluate the property of the resulted briquettes using ultimate analysis and
proximate analysis, and also the effect of the composition of tapioca to the heating value of the biomass
briquettes. Heating values of five mixtures with various tapioca compositions of 10%, 20%, 30%, 40%, and
50% were evaluated using an oxygen bomb calorimeter. The experimental results showed that the biomass
briquettes made of waste Cerbera Manghas leaves can be made using tapioca as a binder. The greater the
percentage of the mass of tapioca in the briquettes, the lower heating value generated. Biomass briquettes
made of waste Cerbera Manghas leaves can be made into a source of sustainable energy with the optimal
composition of 90% waste leaves and 10% tapioca.
