UV-enhanced ozone wastewater treatment system
Patent 5178755 Issued on January 12, 1993. Estimated Expiration Date: 
February 20, 2012. 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.
February 20, 2012. 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 3825494 3836781 3855124 3859215 Methods and apparatus for treating a liquid with a gas Liquid purification system Catalytic process for ozonation of water containing organic contaminants Method and system for waste treatment Ozone/ultraviolet water purifier Purification of water through the use of ozone and ultraviolet light InventorAssigneeApplicationNo. 839111 filed on 02/20/1992US Classes:210/195.1, Serially connected distinct treating or storage units210/196, Of filtrate210/202, Diverse type210/259, Diverse210/748, Utilizing electrical or wave energy (directly applied to liquid or material being treated)210/760, Utilizing ozone210/804And additional diverse separationExaminersPrimary: Silverman, Stanley S.Assistant: Nessler, Cynthia L. Attorney, Agent or FirmInternational ClassC02F 001/78AbstractOzonated liquid is mixed within a multi-stage clarifier system with wastewater to be treated and suspended solids are removed. The clarified effluent is filtered and exposed to ultraviolet radiation. Ozone is injected into the irradiated effluent and received within a contact tower where reaction between the contaminants and ozone takes place. The ultraviolet irradiated, ozonated, and clarified liquid is recirculated through an ozone injector and discharged through a mixer plate into a purge chamber. The purge chamber effluent is split, with a portion returning to the contact tower and passing through a second ultraviolet radiation source, and the remaining purge chamber effluent being distributed within the clarifiers. After a predetermined residence within the system, a diverter valve in the return line is operable to discharge the treated water through a carbon filter and out of the system. The recirculation of the UV irradiated ozonated liquid provides both effective solids removal and reaction of the contaminants with the ozone to produce an acceptable treated water.Other References
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