| http://www.w3.org/ns/prov#value | - in which thickening of the said settled solid pollutants takes place, the thickening compartment including a mechanical means for engaging the solid pollutants falling into the thickening compartment as the pollutants fall therethrough to further thicken the same, wherein the bottoms of the channels are arranged and distributed above said thickening compartment in such a manner that the lower end
|
