Gasification of dried sewage sludge using Bubbling fluidized bed gasifier for Syngas production

Abstract

Driven by the energy demand, the humanity has consumed the fossil fuels to the brink of depletion and in doing so, damaged the natural ecosystem by global warming. Due to increasing earth population energy demand rises exponentially. There is a need that attention must be shifted towards alternative resources of fuel that are renewable and sustainable such as biomass and domestic waste for energy production. Non-lignocellulosic biomass like sewage sludge is the most suitable alternative used instead of fossil fuels because this material has potential to produce syngas which is a mixture of Carbon monoxide and Hydrogen The current research emphasis on the gasification process of sewage sludge for syngas production and to examine the effect of Temperature and Air ratio by using laboratory bubbling fluidized bed gasifier. The ultimate and proximate analysis of Sewage sludge is done for elemental composition and existed functional group is identified through FTIR analysis. The Effect of heating rate (5°C/min, 10°C/min and 20°C/min) on thermal degradation behavior is studied by TGA technique. The product gases are analyzed by GC-TCD. The effect of temperature and Equivalence ratio is optimized at 8500C and 0.35 at which product gas LHV is high with high cold gas efficiency of 42.3% was obtained.