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BIOLOGICAL PHOSPHOROUS REMOVAL
Detention Time Anaerobic 0.5-1.5 1-2 1-2 1-2 Anoxic 1 0.5-1.0 2-4 2-4 1-2 ... to uptake excess phosphates in the aerobic basins. Too short a sludge age will result in insufficient ... need for anoxic zones becomes critical for denitrification and the removal of nitrates. Long sludge ages such as in extended aeration systems, can lead to secondary
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