CPC B01D 65/02 (2013.01) [C02F 1/444 (2013.01); B01D 29/66 (2013.01); B01D 2321/2075 (2013.01); B01D 2321/40 (2013.01); C02F 2303/16 (2013.01)] | 9 Claims |
1. A method for cleaning a filter element made of a porous material, the method comprising:
directing, by an ultrasonic element, ultrasound to the filter element, wherein the ultrasonic element is inside the filter element, and
directing, after a predefined time from starting of the ultrasound, an impulse to a filtrate reservoir causing filtrate inside the filtrate reservoir to be forced inside the filter element in order to remove particles from the surface of the filter element, wherein pressure of the impulse is between 4 to 8 times higher than the forward pressure, and the reverse flux, measured in volume per area time, caused by the impulse is at the minimum 2 to 8 times the feed flux.
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