ApplicationNo. 578829 filed on 05/19/1975
US Classes:210/608, Regulating floating constituent210/705, Chemically specified precipitant, coagulant, or flocculant210/713, Of separated solids210/724, Regulating pH210/776Skimming
ExaminersPrimary: Spear, Frank A. Jr.
Attorney, Agent or Firm
International ClassB01D 17/02 (20060101)
AbstractWaste water feed contaminated with fatty residue and a recycle of froth from a later stage of the process are acidulated; the resulting less dense oil phase is separated from the remaining denser aqueous phase; the pH of the latter then is raised to at least about 6 and it subjected to a dissolved air flotation operation for producing (a) a froth for recycle into admixture with said waste water feed, and (b) a treated water underflow substantially free of initial fatty residue content.
Field of SearchDiverse