反硝化除磷工艺研究

研究了反硝化除磷工艺的运行效果。结果表明，此反硝化除磷工艺可以较好地进行除磷脱氮，但是磷的去除对进水氮的浓度有一定的要求。在进水COD 400mg／L，总磷15mg／L，氨氮84mg／L的条件下COD的降低率可达96％以上，氮的去除率稳定在86％～88％，磷的去除率为92%～95%。进水氨氮质量浓度为60mg／L时，磷的去除率为78％，在进水氨氮质量浓度降为44mg／L时磷的去除率降为68％。反硝化除磷比以氧为电子受体的生物除磷可减少耗氧55．5％，剩余污泥的产生量可减少53％，温室气体CO2的产生量可减少体积分数21．4％。

Study of Denitrifying Dephosphatation Process

A denitrifying dephosphatation process was operated in this study.The results showed that the denitrifying dephosphatation process could remove phosphorus and nitrogen successfully at an adequate concentration of nitrogen in inflow.Above 96% COD was removed when the inflow COD,total phosphorus(TP) and ammonia nitrogen(NH3-N) were 400 mg/L,15 mg/L and 84 mg/L respectively,86%~88% nitrogen and 92%~95% phosphorus was removed simultaneously.But when the inflow NH3-N was 60 mg/L,78% phosphorus was removed,once the inflow NH3-N dropped to 44 mg/L,only 68% phosphorus was removed in the system.In the system used nitrate as electron acceptor,the oxygen consumption was 55.5% less than the system that oxygen was used as electron acceptor.The sludge and CO2 production was 53% and 21.4% less,respectively.