亚硝酸盐为电子受体反硝化除磷工艺的可行性

Feasibility of denitrifying phosphorus removal technique using nitrite as electron acceptor

采用序批式反应器(SBR),以亚硝酸盐为电子受体,探讨了厌氧/缺氧条件下反硝化除磷工艺的可行性,并通过间歇实验考察了亚硝酸盐浓度、进水COD浓度和进水pH值对反硝化除磷工艺的影响.结果表明,亚硝酸盐作为电子受体的同步脱氮除磷过程是完全可以实现的,控制NO2--N浓度为35±5mg/L、厌氧段进水pH值为8.0±0.1,缺氧段进水pH值为7.2±0.1、COD浓度为400mg/L时,反硝化除磷效果最佳.

The feasibility of denitrifying phosphorus removal （DPR） technique was explored under anaerobic/anoxic condition using nitrite as electron acceptor, and adopting sequencing batch reactor （SBR）. The influence of nitrite concentration, COD concentration and pH value of inflow water on DPR was inspected through batch tests. Synchronous DPR process using nitrite as electron acceptor could be realized fully. The effect of denitrifying phosphorus removal was the best when the NO2^--N concentration of 35±5mg/L, pH of 8.04±0.1 in anaerobic stage, pH of 7.2±0.1 in anoxic stage, and COD concentration of 400mg/L were controlled.