三维电极法处理生活污水研究

Study on the Treatment of Domestic Sewage with the Technology of Three-dimensional Electrode

[目的]为科学处理生活污水提供参考。[方法]研究活性炭填料时停留时间、极板间电压、极板间距及添加剂对三维电极法处理生活污水效果的影响。[结果]反应时间越长,处理效果越好,但由于副反应的增强使得电能的利用率降低,存在一个最佳反应时间,使得吸附速度和氧化速度大致相等;输入电压升高,COD的去除率升高,当电压升高到一定程度的时候,去除效果趋于稳定;极板间距增大,去除效果降低;投加NaC l对废水处理效果影响不大。当反应时间为30 m in,能耗为2.84 kW.h/kg,生活污水COD去除率稳定在85%左右,NH3-N去除率稳定在84%左右。[结论]采用三维电极法处理生活污水方法可行,在适当的反应条件下,污水COD和NH3-N去除率均较高。

[Objective] The reference for the scientific treatment of domestic sewage was provided through the experiment.[Method] The effect of the reaction time of activated carbon-filling,the voltage and distance between plates,and the additives on three-phase/three-dimensional electrode method treating the domestic sewage was analyzed.[Results] The longer the reaction time was,the better the treatment efficiency was;however,the using rate of electrical power was reduced because of the the by-reaction increasing.There was an optimal reaction time,which made the absorption rate being almost equal to the oxidation rate.The elimination rate was elevated with the increment of input voltage and the treatment efficiency would be stable while the voltage reached to the certain value.The elimination effect would be reduced while the distance between plates.The addition of NaCl did not affect the treatment.When the electrolysis time was 30 minutes with the energy consumption of 2.84 kW·h/kg,about 85% of the removal rate of COD in domestic sewage could be stabilized and the removal rate of NH3-N was about 84%.[Conclusion] It was feasible for the domestic sewage to be treated with the method of three-phase/three-dimensional electrode and under the suitable condition there was a high removal rate of COD and NH3-N.