Among all influencing factors,too high dissolved oxygen(DO) concentration must be avoided,which in aerobic zone should be less than 2 mg/L and which in anaerobic zone less 0.2 mg/L.

• 分析结果表明:生物除磷系统的溶解氧浓度不宜太高；一般好氧区DO<2 mg/L；厌氧区DO<0.；2 mg/L;