Liquid purification or separation – With gas-liquid surface contact means – With separator
Reexamination Certificate
2008-06-13
2010-06-29
Upton, Christopher (Department: 1797)
Liquid purification or separation
With gas-liquid surface contact means
With separator
C210S262000, C210S266000, C210S617000, C210S631000, C210S912000
Reexamination Certificate
active
07744755
ABSTRACT:
The present invention provides a biological treatment and filtration system equipment that can reliably remove most of materials harmful to the human body and arsenic components not capable of being removed until now, which are contained in the raw water, by a series of purification operations. A biological treatment and filtration system equipment includes a filter sand layer111that treats raw water by microorganism to filter impurities; a raw-water supplying unit112that is provided on the upper side of the filter sand layer; an outlet113that is provided on the lower side of the filter sand layer and is used to take out filtered water; a filtering net114that is detachably held on the upper side of the filter sand layer in a vessel, and includes a net body114A to which absorbent capable of absorbing arsenic components contained in raw water is adhered, and a frame114B fixed to an outer periphery of the net body; and a tube (114E) that is provided at an outer portion of the frame and is inflated by pressure fluid so as to seal a gap between the frame and an inner surface of the vessel.
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Smith Patent Office
Upton Christopher
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