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The role of two types of carrier in a continuous activated sludge (AS) reactor-powdered zeolite (AS+Z) and powdered activated carbon (AS+PAC)-for nitrification was evaluated under high organic loading, with addition of zinc and phenol. When the organics concentration of the influent was increased from 240 mg/l of COD to 360 mg/l, increasing the mass ratio of COD to total nitrogen (C/N ratio) to 5...
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