Atomized sludges via spray-drying at low temperatures: An alternative to conventional wastewater treatment plants

► Spray-drying is an alternative to treat raw sludge from wastewater treatment plants. ► Experimental results are obtained with a laboratory spray dryer. ► The experimental procedure is extrapolated to an industrial plant scale. ► The process proposed would have better economic balance than other treatments. ► This alternative allows transforming a waste into a versatile and valuable product.