WATER PURIFICATION DEVICE

WIPO Patent Application WO/2010/029604

A1

This invention provides a water purification device which can efficiently purify water, for example, for raising aquarium fishes. Air bubbles are supplied and dispersed in treatment object water by a treatment object water supply device (20). The treatment water with air bubbles dispersed therein supplied from the treatment water supply device is delivered in a tangential direction within an agitating part (32) in a vertically long cylindrical treatment tank (30) through a nozzle (26) at such a pressure that the treatment water is reservoired in the overall height in a vertical direction of the treatment tank, whereby a swirling flow (S) of the treatment water is formed within the agitating part (32). In this case, contaminants contained in the treatment object water are captured in the air bubbles by allowing the swirling flow (S) to stay for a predetermined period of time. The air bubbles with the contaminants being captured therein are allowed to ascend, are pushed out from the treatment tank, and are received in a contaminant receiving tank (40). The water cleaned by removing the contaminants is allowed to flow downward by the pressure of water in the upper part of the agitating part (32) and is withdrawn through a purified water withdrawing passage (27).

JP2000245296	DEVICE FOR CLEANING WATER
JP2011110010	PRECIPITATE CLEANING DEVICE FOR AQUARIUM
JPH10165795	WATER QUALITY IMPROVING DEVICE

KAMIHATA MICHIKO (JP)

PCT/JP2008/066211

March 18, 2010

September 09, 2008

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KAMIHATA FISH IND LTD (JP)
KAMIHATA MICHIKO (JP)

A01K63/04; C02F1/24

US5736034A	1998-04-07
US6808625B1	2004-10-26
JPH05168369A	1993-07-02

ISHII, Hisao et al. (JP)
Hisao Ishii (JP)

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