The sludge will be drained with centrifuges before being discharged as dry sludge.

Since 2012, Lecta has maintained its levels of dry sludge generated per ton of paper produced.

Dry sludge left over after wastewater treatment along with used paint powders are recovered by a company specializing in industrial waste management.

Calculations indicated that for a 90% removal of 40 µg/L uranium, the typical dry sludge can contain 135 pCi/g CaCO3(s) (Clifford, 2016a).

Clifford (2016a) has estimated that for 50% removal of 40 µg/L uranium from the influent water, the resulting dry sludge would contain 800 pCi/g Fe(OH)3(S).