| 摘要 |
A floating media filter is provided, comprising a tank having a filtration chamber and an expansion chamber, wherein the filtration chamber is above and fluidically connected with the expansion chamber; floating filter media in the tank for forming a floating media pack, having a top portion, in the filtration chamber when the tank is filled with liquid and the filter media are undisturbed; an upper screen having openings adapted to prevent the filter media from passing therethrough, positioned in the tank near the top portion of the floating media pack; an inlet line fluidically connected to the tank below the filtration chamber; a sludge line having an output end, fluidically connected to the tank below the lower screen; a sludge valve, positioned in the sludge line; an outlet line fluidically connected to the tank above the upper screen; a lower screen having openings adapted to prevent the filter media from passing therethrough, positioned in the tank below the filter media and above the sludge line; and an air inlet line fluidically connected to the tank for drawing air into the expansion chamber and disturbing the floating media pack inside the filtration chamber during backwashing of the biofilter. |
