**Abstract**

This chapter aimed to estimate the calorific value and potential of electrical energy that can be generated from the organic fraction of municipal solid waste through mathematical models, bioconversion, and thermochemical approach. The calorific values were calculated using the empirical relationship between higher heating value and ultimate analysis data, stoichiometric manner, and thermochemistry concept. The potential of electrical energy that can be produced was calculated based on literature data on the specified power plant. The result showed that the calorific value and potential of electrical energy recovery of the thermochemical approach are higher than others.

**Keywords:** municipal solid waste, organic fraction, higher heating value, energy, electrical energy recovery
