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- W788202322 abstract "This research examined behavior of nutrient conversion during steady-state operation of continuous flow intermittent activated sludge process. Two reactors were operated parallel and acetate was injected into the sludge layer during settling and decanting periods in order to investigate the phosphorus release and denitrification in the process. Such scheme effectively induced P-release inside the sludge layer and excess P-uptake during the subsequent aeration period for phosphorus removal. From the relationship between nitrification and phosphorus removal, nitrification with high rate resulted in high nitrate concentration and this caused the inhibition on phosphorus release from the sludge layer during anaerobic period. Nitrate in the sludge needed to be denitrified in the anoxic settling period before effective phosphorus release could take place. In the initial point of settling period, the nitrate concentration in the reactor with acetate injection was quite different from one in the reactor without it. 25 minutes of lag-time was observed in phosphorus release after the introduction of acetate and most of phosphorus release occurred during the decanting period. The DO concentration should be maintained at the optimum range (0.5-1.0 mg/L) during the aeration period for phosphorus removal. It was also found that increased pH drop and higher influent pH had effect on increased effluent orthophosphate concentration." @default.
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- W788202322 date "1999-01-01" @default.
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- W788202322 title "Steady-state Behavior of the Continuous Flow Intermittent Decant Activated Sludge Process for Biological Nutrient Removal" @default.
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