有机物含量及碳磷比对生物接触氧化法除磷效果的影响

在系统稳定运行的条件下,研究污水CODCr浓度及CODCr/TP比值对间歇式生物接触氧化反应器除磷效果的影响.试验结果表明,当原水CODCr低于500 mg/L时,总磷去除率随原水CODCr的提高而提高,而当CODCr超过500 mg/L时,总磷去除率随着CODCr的提高而逐渐下降,但CODCr去除效果不受影响.当CODCr/TP在低于70左右时,随着CODCr/TP的增大除磷率也迅速上升,超过70后除磷效果逐渐下降.因此,污水的CODCr浓度对间歇式生物接触氧化反应器的除磷效果有直接影响,总磷去除率随着CODCr的提高而提高,在CODCr浓度为500 mg/L左右时,除磷效果最好,而后开始下降.根据试验结果,当污水的CODCr/TP值约为50～100时,可以达到较好的除磷效果.

Influence of CODCr on Phosphorous Removal of Batch Biological Contact Oxidation Reactor

The influence of CODc, on phosphorous removal of batch biological contact oxidation reactor was studied in this paper. As the system was running steadily, we changed CODc, of sewage as 50 mg/L, 150 mg/L, 300 mg/L, 400 mg/L, 500 mg/L, 650 mg/L , 800 mg/L, and TP as 5 ~7 mg/L. When the CODc, was lower than advancing as the 500 mg/L,the removal rate of TP was advancing as the CODc, was enhancing. When the CODcr was exceeded 500 mg/L,the TP removal rate began to declined. The CODcr. removal rate was maintained. The most aonrooriate CODcr/TP should ha 50 - 100.