Abstract
A deodorizing system by combustion of fermentation gas from chicken droppings was developed, and the deodorizing effect was investigated. The reaction of NH3/N0x in the combustion system was also studied. The odor concentration of exhaust from this system was less than 103 and the odor removal at 650°C and 780°C of the furnace temperature was 92 and 98%, respectively. The NOX concentration in the exhaust was less than 140 ppm, though the concentration of NH3 in the fermentation gas was over 1000 ppm. It was assumed that NOX generated by combustion reacted noncatalytically with NH3 in inflow gas and formed N2 in the combustion furnace. The excess of 02 was favorable in the reduction of NOX from the results of the NH3/NOX reaction in an electric furnace. The generation of NOX at high temperature was restrained in the excess of NH3.
