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Jet MCR™Fluidyne replaced existing surface rotors and mixers with jet aeration / mixing equipment. The upgrade improves nitrogen and phosphorous removal and increasing the organic and hydraulic loading capability through the process while saving power.
Collect
The activated sludge process consists of three channels. In operation, raw screened and degritted wastewater is fed to the outer channel. As the flow circulates, it passes through several aerated and anoxic zones. In the aerated zones, carbonaceous removal and nitrification occur. In the anoxic reaches between the aerobic zones, denitrification occurs. If the system is properly designed, anaerobic conditions can promote biological phosphorous removal. The flow then passes through transfer ports to the middle, or “swing” channel. In periods of high loading, the dissolved oxygen concentration in the “swing” channel falls and the channel operates in the nitrification/denitrification mode of the outer channel. In periods of low load, the dissolved oxygen concentration in the “swing” channel increases and the channel serves to accelerate the aerobic processes. The flow then passes through another transfer port to the inner channel. The dissolved oxygen concentration in the inner channel is maintained at 2.0 mg/l or more to complete carbonaceous removal and nitrification. |
