Patent ID: 11938426
Assignee: O.M.IT S.R.L.
Field: Chemical engineering (Chemistry)
Classification: CPC B  Y | IPC B

Claim 19:
20. Apparatus comprising:
a liquid-permeable filtering element having first and second faces, the liquid-permeable filtering element movable into at least partial submersion in a liquid, the liquid-permeable filtering element configured for cyclical movement through the liquid such that:
when moved into a first position, an area of the first face of the liquid-permeable filtering element is subject to liquid under pressure and a pressure difference across the liquid-permeable filtering element is greater than 0 and less than or equal to 5.9 kPa; and
when moved into a second position, the area is not subjected to liquid under pressure or is subjected to liquid at a lower pressure difference,
at least one nozzle for directing at least one jet at the second face of the liquid-permeable filtering element through the liquid permeable filtering element towards the first face of the liquid-permeable filtering element for removing and/or aiding removal of solids accumulated on the first face of the liquid-permeable filtering element;
wherein
the liquid-permeable filtering element includes pores having a range of different pore sizes, the pore sizes being between 2 and 40 μm; and
the apparatus further comprises:
at least one gas feeder for introducing gas bubbles into the liquid during filtration by the liquid-permeable filtering element with the gas feeder positioned below the first position so that when the liquid-permeable filtering element is in the first position and the gas feeder is introducing gas bubbles, the gas bubbles create turbulent motion along the first face of the liquid-permeable filtering element.