The invention relates to the treatment of waste water containing a harmful ion such as a heavy metal ion or fluorine ion by the coagulating sedimentation method using an inorganic coagulant such as an iron compound or an aluminum compound. After separating treated water from the sediment (sludge) in...http://www.google.es/patents/US5855793?utm_source=gb-gplus-sharePatente US5855793 - Method of treating waste water to remove harmful ion by coagulating sedimentation
Method of treating waste water to remove harmful ion by coagulating ...
