Sludge Dryer Wet Scrubber Used to Produce Renewable Energy

Bartocci, Andrew C.
March 2009
Proceedings of the International Conference on Waste Technology ;2009, p450
Conference Proceeding
A new biosolids processing facility in Southern California produces cement kiln fuel from waste sludge to provide a renewable source of energy. The majority of the facility dryer exhaust is recycled while the balance is exhausted to atmosphere. The dryer exhaust contains ammonia, particulate, sulfur compounds, and moisture. The sludge dryer wet scrubber condenses the moisture and captures the pollutants through a combination of air pollution control system components which include a quencher, condenser/absorber, Venturi scrubber, and packed bed absorber. Simultaneous condensing of water vapor and pollutant removal enables the exhaust to be recycled to the dryer while at the same time enabling the plant to meet tough California regulatory requirements for SOx, NOx and particulate.


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