Feasibility study on thermal treatment of municipal solid waste in Nonthaburi province, Thailand

Abstract:
In this paper an incineration and a pyrolysis plant for treatment of 300 tons of municipal solid waste (MSW) per day in Nonthaburi province / Thailand are mathematically modeled and studied in terms of product stream quality and electrical power output. In order to account for the complex chemical system the simulation software Equitherm 3.01 [16], in which thermochemical equilibrium states are calculated by applying the minimum Gibbs free enthalpy criterion, is used for the calculations. In order to estimate plant efficiency and electricity output under realistic conditions, several scenarios are considered in the calculations. A moisture content level of 41% is regarded as average while the effect of moisture content in the waste is studied. The results show that the electric efficiency of the incineration plant is much higher than that of the pyrolysis plant, because a significant part of the carbon content of the waste is lost with the bottom ash stream in the latter process.

Keywords:
Municipal Solid Waste (MSW) / Pyrolysis / Incineration / Thermal treatment

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