O3/H2O2法灭活水中剑水蚤类浮游动物

为解决水源水中孳生的水蚤类浮游动物难以被常规的水处理工艺有效地去除,困扰水厂正常生产运行的问题,进行了O2氧化、H2O2氧化和O3／H2O2高级氧化对水体中剑水蚤类浮游动物灭活效果的试验研究．发现3种方法中,O3／H2O2联合时除蚤效果最佳,在蒸馏水中投量为031．0mg／L、H2O24mg／L时,接触30min达到100％的灭蚤率;单独O3氧化效果也较好,投加1．0mg／L的灭蚤率为80％;H2O2氧化效果不理想,投加4mg／L几乎无灭蚤效果。进而考察确定了03／H2O2灭活剑水蚤的最佳工艺条件为：先加O3后加H2O2,投加间隔时间30～60s为宜;并探讨了H2O2投量、水体pH值以及有机物含量对O3／H2O2系统灭活剑水蚤效果的影响。试验中发现H2O2投量在4～10mg／L之间效果无较大变化,有机物含量对灭蚤影响较大,pH值的影响则较小。最后对O3／H2O2预氧化与水处理混凝沉淀工艺的协同除蚤效能进行了考察。结果表明,O3／H2O2预氧化与水处理混凝沉淀工艺的协同作用将会进一步提高除蚤的效果。

O3/H2O2 oxidation processes of cyclops of zooplankton inactivation in water

The inactivation effects of ozone, hydrogen peroxide, O_3/H_2O_2 processes on Cyclops of zooplankton were discussed. It was found that O_3/H_2O_2 possessed more favorable inactivation effect on Cyclops compared with the others, in distilled water with 1.0(mg/L) of O_3 and 4mg/L of H_2O_2 the inactivation effect was 100% after 30min contacting; ozone also had favorable inactivation effect, the inactivation effect is 80% by 1.0mg/L of ozone alone; while hydrogen peroxide didn't, there was almost no inactivation effect by (4mg/L) of H_2O_2. The best inactivation condition for O_3/H_2O_2 processes, that was, two oxidants were added sequentially with interval in range of 30 to 60 seconds, for them ozone at first. And the influencing factors under various conditions such as the dose of hydrogen peroxide, organic substance content, pH value, etc. were researched and reported. It was found that the effect didn't changed largely with H_2O_2 on the range of 4mg/L to 10 mg/L, and inactivation effects on Cyclops of O_3/H_2O_2 were not sensitive to pH value, while it declined obviously as the organic content increased. Finally, synergic removal effect on Cyclops with O_3/H_2O_2 pre-oxidation followed by clarification process was investigated. The results show that the removal effect on Cyclops is further strengthened by clarification processes after O_3/H_2O_2 pre-oxidation.