进水N/P对MUCT工艺脱氮除磷性能的影响

研究了进水N/P对MUCT（modified university of cape town）工艺脱氮除磷性能的影响。结果表明,在低N/P（N/P=3.5～5.5）条件下,当进水N/P升高时,混合液回流2比值加大,缺氧吸磷率增加,对TP的去除率在93%以上;在高N/P（N/P=7.7～10.7）条件下,当进水N/P升高时,第2缺氧区硝酸盐氮浓度增加,缺氧吸磷率增加;随着N/P的升高,氮的同化去除率下降,同化作用对总氮的去除贡献减小;随着N/P的升高,好氧吸磷速率下降,硝化速率增加,出水氨氮浓度较低,在3.3 mg/L以下。

Effects of Influent N/P on Denitrifying PhosphorusRemoval Characteristics in MUCT Process

Effects of N/P on denitrifying phosphorus removal characteristics in MUCT（Modified University of Cape Town） were investigated.The results showed that：under low N/P ratio（N/P=3.5～5.5）condition,when influent N/P raised,mixture back flow 2 ratio increased and anoxic phosphorus uptake rate increased,TN removal rate was above 93%,under high N/P ratio（N/P=7.7～10.7） condition,when influent N/P raised,NO3--N in anoxic 2 increased and anoxic phosphorus uptake rate increased;assimilatory removal rate of nitrogen decreased and the contribution of assimilation to TN removal decreased with influent N/P increasing;anaerobic phosphorus uptake rate decreased,rate of nitrification increased and effluent ammonia nitrogen was below 3.3 mg/L.