Liquid purification or separation – With means to add treating material – Plural distinct separators
Reexamination Certificate
2005-10-11
2005-10-11
Cintins, Ivars C. (Department: 1724)
Liquid purification or separation
With means to add treating material
Plural distinct separators
C210S205000, C210S259000, C210S269000, C210S284000, C210S290000
Reexamination Certificate
active
06953525
ABSTRACT:
A package plant for treating raw water to yield potable water. The package plant includes an inlet for raw water, followed by an ozonator for disinfecting the water. Next is provided an up flow roughing filter including a chemically active layer, on top. A slow sand filter follows, which is sized and shaped to promote growth of a biomass for water purification. The up flow roughing filter removes particulates, contributes to the removal of dissolved organics, and protects the slow sand biomass by removing disinfection residuals. In another aspect a method of maintaining the plant is provided, including washing the up flow roughing filter by draining water down through it, providing a vigorous up flow to agitate the top layer, and then washing the slow sand filter.
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Cintins Ivars C.
Fay Sharpe Fagan Minnich & McKee LLP
MS Filter Inc.
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