1 results about "Pumice" patented technology

The present invention relates to a hybrid filter unit (2) comprising a housing (4) having an inlet (6) for the inflow of a fluid to be purified and an outlet (8) for the outflow of the purified fluid. The hybrid filter unit (2) further comprises a wall structure (16) disposed inside the housing that defines a fluid mixing chamber (18), the wall structure defining an internal cross-sectional area that decreases at least partially in the direction from the inlet (6) to the outlet (8). The hybrid filter unit (2) further comprises a nozzle (14) disposed to supply an oxidizer to the mixing chamber (18), thereby exposing the fluid to the oxidizer as it flows between the inlet and the outlet and allowing it to react with the oxidizer. The hybrid filter unit (2) further comprises a filtration structure (74) disposed between the inner wall surface of the housing and the outer wall surface of the wall structure, the filtration structure comprising volcanic pumice (78), and the wall structure (16) is at least partially adapted to the flow of fluid from the mixing chamber (18) to the filtration structure (74).