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The differences of free cyanide inhibition on nitrification and denitrification responsible for nitrogen removal in an activated sludge process were investigated in both batch and continuous flow systems. In a batch system, free cyanide of 0.2mg/L caused a distinct lag phase on nitrification in activated sludge, while denitrification was almost completely inhibited at 5.0mg/L of free cyanide. However,...
Simultaneous biological phosphorus and nitrogen removal with enhanced anoxic phosphate uptake was investigated in an anaerobic-aerobic-anoxic-aerobic sequencing batch reactor ((AO) 2 SBR). Significant amounts of phosphorus-accumulation organisms (PAOs) capable of denitrification could be accumulated in a single sludge system coexisting with nitrifiers. The ratio of the anoxic phosphate uptake...
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