C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 1/00 (2006.01) B01D 29/11 (2006.01) B01D 33/35 (2006.01) C02F 3/00 (2006.01) C02F 3/02 (2006.01) C02F 3/06 (2006.01) C02F 3/10 (2006.01)
Patent
CA 2464384
A method and apparatus for processing raw sewage wastes includes the steps of maintaining a non-turbulent drift-like state of fluid motion in substantially all areas of a septic tank, providing a high surface area for biological growth at least twice the interior surface area of the tank, injecting air into the fluid so as to produce a high volume of micro bubbles, and, ensuring that a preponderance of the micro bubbles have both a high tendency to drift entrained with the moving fluid rather than rise through said fluid and also a high tendency to stick to interior surfaces for extended periods. The motion is provided by air flow within restricted tubular channels. The apparatus comprises a plurality of vertically oriented open filter arrays each comprising a restrained bundle of tubular thin-walled filter elements extending substantially the full length oil a respective said array with an irregular interior and exterior surface exposed to the sewage fluid and arranged to abut one another within said bundle. Means for restraining the bundles in both vertical and horizontal directions provides for substantially free drift-like motion of the sewage fluid through said restraining means. The apparatus includes at least one air supply duct arranged within at least one of the filter elements, said air supply duct occupying substantially all of the interior diameter of a respective one of said tubular filter elements and being substantially shorter in length than said array and said tubular element so as to maintain air flow substantially within said respective tubular element, said air supply duct providing an air flow which does not substantially escape said tubular element, adapted to provide a preponderance of sticky micro bubbles entrained within the sewage fluid and which remain entrained and adhered to biological surfaces for extended periods.
Na
Perry Garnet S.c.
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