Micro-filter disc and a method for its production

Details Micro-filter disc and a method for its production Micro-filter disc and a method for its production

B - Operations, Transporting

01

D

B01D 39/20 (2006.01) A61L 2/02 (2006.01) B01D 71/02 (2006.01) C02F 1/44 (2006.01) C04B 14/08 (2006.01) C04B 35/14 (2006.01) C04B 38/00 (2006.01) C04B 38/08 (2006.01)

Patent

CA 2157680

The invention at hand relates to a micro-filter disc based on kieselguhr, also known as diatomaceous earth, particularly for a complete sterilization of water. The micro-filter disc contains at least two kinds of silicately bonded kieselguhr at least one of which is pre-calcined and later burnt or sintered. The micro-filter disc has pore sizes in preferred magnitudes of 0.1 to 0.3µ whereby bacteria are mechanically and safely retained. A method is disclosed making possible the use of three kinds of kieselguhr and kaolin in connection with a careful drying and sintering thereafter. Thereby, it is possible to produce discs having diameters larger than 35cm and a thickness of 1 to 1.5cm. Such discs can be cleaned by way of rotating brushes slightly scraping off the discs. This enhances a simple construction of self-cleaning filter installations. The thus constructed filter installations require very little service and can be serviced by inexperienced operators.

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