Patent ID: 7651612

Claim:
A device for purification of contaminated liquid comprising: (a) a prepurification tank in which raw water to be purified and a foaming reagent are introduced and mixed and the pH value is adjusted, whereby prepurified water is obtained, wherein the foaming reagent is introduced via a connected container for containing the foaming reagent and the pH value is adjusted via a pH value regulating device associated with the prepurification tank; (b) at least one tower-shaped main purification unit, wherein each of the at least one tower-shaped main purification units, includes, arranged vertically one under another; (i) a drum station for combined gas and water scrubbing by foaming; (ii) a defoaming station; (iii) an ionization station; and (iv) a collecting tank for collecting resultant purified water; (c) a separating device in which sludge from the purification tanks is introduced; and (d) at least one afterpurification filtering device connected to the collecting tank of the main purification unit by a supply line and wherein a pure water outlet line extends from the at least one afterpurification filtering device.