鸟粪石法处理高浓度氮磷废水的动态试验研究

The study on removal of nitrogen and phosphorus from waste water by struvite formation under the condtion of dynamics

本研究以实验室模拟的高浓度氮磷废水为研究对象,采用折流式反应器,探讨了在动态条件下,pH、Mg:P、N:P及水力停留时间对鸟粪石法脱氮除磷的影响。试验结果表明:对于氨氮的去除率,以上四个因素影响相当;对于磷的去除率,各因素的影响大小为:N:P>pH>Mg:P>水力停留时间。当模拟水样中的TP浓度为310mg/l,pH为9.7,水力停留时间为60min,Mg:N:P=1.2:1.2:1时,氨氮和磷的去除率分别可高达85.8%和86.3%。

A study is carried out in the laboratory with simulated waste water containing a great of phosphorus and nitrogen, using baffled reactor. Under the condition of dynamics ,the effects of pH value,N/P and Mg/P mole ratios and Hydraulic Retention Time on removal of nitrogen and phosphorus by struvite formation are investigated. The results indicated that the effect of four factors on removal rate of nitrogen is almost equivalent . As to the removal rate of phosphorus , N：P is the key parameter, the next are pH value,N/P and Mg/P mole ratios and Hydraulic Retention Time. 85.8% of phosphorus and 86.3% of nitrogen in the simulated waste water containing 10mmol/1 TP were removed under the condition of 9.7 of pH value,60 min of Hydraulic Retention Time and 1.2 of mole ratios of N/P and Mg/P.