C - Chemistry – Metallurgy – 02 – F
Patent
C - Chemistry, Metallurgy
02
F
C02F 3/06 (2006.01) C02F 3/00 (2006.01) C02F 3/04 (2006.01) C02F 3/12 (2006.01) C02F 3/26 (2006.01)
Patent
CA 2126647
ABSTRACT A method and apparatus (1) for the control of biological treatment of waste water in which waste water is fed to a substantially air tight supported growth biological filter unit (2) that includes an exhaust gas vent (5). Dissolved oxygen is supplied to the filter unit and the oxygen consumption rate across the filter is measured by comparing the flow rate of oxygen into the filter (2) to the flow rate of oxygen exiting the filter through the gas vent (5). The feed rate of waste water is adjusted to maintain a predetermined oxygen consumption, thereby controlling the effluent quality. The appropriate oxygen consumption rate to give a desired effluent quality is determined empirically for each system and type of waste water to be processed.
Commonwealth Industrial Gases Limited (the)
Gowling Lafleur Henderson Llp
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