Abstract
Under the condition that the temperature between 20 °C ~ 27 °C, in stable operation period, the effect of the anoxic and aerobic tanks which presented in municipal wastewater treatment using orthogonal experiment, and optimum conditions of A /O Biofilm Process of Silicon-based zeolite Filter Material were studied: the gas-water ratio 1:2, and the reflux ratio of digestive juice 1:2 and hydraulic retention time (HRT) for the 2h.Under this operating conditions, the removal rate of total nitrogen, phosphorus and ammonia nitrogen are respectively up to 73.57%, 64% and 85.28%. The concentrations of total nitrogen, phosphorus and ammonia nitrogen can be respectively reduced to 18.75mg/L, 1.06mg/L and 3.94mg/L in the ultimate effluent, which meet standard B of the first class in National discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002).
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