| http://www.w3.org/ns/prov#value | - In hitherto known decanting systems, the liquid to be treated, notably water, to which suitable reagents such as coagulating agents, flocculating agents, pH correctors, activated carbon, etc., have been added, is caused to circulate upwardly through the previously formed sludge bed which is adapted to act by contact with the water and to promote the settling or agglomeration of the precipitates th
|
