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US 6,332,977 B1Granted
Apparatus for steam sterilizing and recycling leaf-filter aids
AssigneeACS Acquisitions Corp.
InventorKenneth F. Janecek
Life of this patent
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AssigneeACS Acquisitions Corp.
InventorKenneth F. Janecek
Estimating the term…
Steaming filter aid cakes in-place in a pressure leaf filter is a simple, inexpensive, and reliable technique for insuring that all collected pathogens are destroyed and never released back into the environment. Filter aids including diatomaceous earth reduce giardia and cryptosporidium by at least 6 logs. D.E. filtration allows the flexibility to adjust the dosage for bodyfeed and the grade to suit changing water conditions, and the process of bodyfeeding filter aids is the only technology that seals its own leaks. After sterilization, the filter aids can be recycled. With hydrocyclones the contaminants can be separated from the filter aids and up to 90% of the filter aid can be recovered. This makes filter aid treatment a very cost effective treatment for large plants as well as the smaller plants where this technology has been used in the past. Pressure leaf filters using filter aid precoat can be used in place of sand filters, after sand filters, on good water supplies directly without pretreatment, or to clean sand filter backwash.
An apparatus for sterilizing and recycling filter aid in a pressurized leaf filter having a vessel, a manifold separating said vessel into two sides, at least one leaf sealably connected to said manifold, a filter cake of a filter aid covering said leaf, a filter inlet for introducing a body feed, said body feed containing material to be filtered and a quantity of filter aid, and a filter outlet on the side opposing said leaf, wherein the apparatus comprises:
An apparatus for sterilizing and recycling filter aid in a pressurized leaf filter having a vessel, a manifold separating said vessel into two sides, at least one leaf sealably connected to said manifold, a filter cake of a diatomaceous earth filter aid covering said leaf, a filter inlet for introducing a body feed, said body feed containing material to be filtered and a quantity of said filter aid, and a filter outlet on the side opposing said leaf, wherein said apparatus comprises:
An apparatus for filtering comprising:
Dependencies are inferred from the claim text.