Waste water treatment process
Patent 4001114 Issued on January 4, 1977. Estimated Expiration Date: 
January 4, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 4, 1994. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 1807833 1947709 2217143 3192155 3259567 3419493 3707464 InventorsAssigneeApplicationNo. 578829 filed on 05/19/1975US Classes:210/608, Regulating floating constituent210/705, Chemically specified precipitant, coagulant, or flocculant210/713, Of separated solids210/724, Regulating pH210/776SkimmingExaminersPrimary: Spear, Frank A. Jr.Attorney, Agent or FirmInternational 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 | |
