高铁酸钠预氧化处理含藻水的效能研究

Study on the efficacy of sodium ferrate pre-oxidation treatment of algae water

将高铁酸钠作为预氧化剂处理含藻水,探究了藻类处理效能、水质变化和消毒副产物的生成潜能。结果表明:高铁酸钠对藻类后续混凝沉淀有强化作用,投加浓度大于5 mg/L时,经过混凝后叶绿素a及嗅味物质β-环柠檬醛的去除率分别可达99%和98%以上。高铁酸钠浓度过高会造成藻类细胞的损伤,预氧化后水中有机物浓度上升,经混凝后能被有效去除。随着浓度的升高,高铁酸钠预氧化处理含藻水会导致三氯甲烷、一氯乙酸和二氯乙酸等消毒副产物生成潜能的增大,在实际应用中应严格控制投加量。

Using sodium ferrate as a preoxidant to treat algae-containing water, the algae treatment efficacy, water quality changes and disinfection by-product formation potential were investigate. The results showed that sodium ferrate had an enhanced effect on the subsequent coagulation and precipitation of algae, and the removal rates of chlorophyll a and β-cyc, an odorant substance, could reach more than 99% and 98%, respectively, after coagulation at a dosage greater than 5 mg/L. The high concentration of sodium ferrate could cause damage to algal cells, and after pre-oxidation, the concentration of organic matter in water rose, which could be effectively removed by coagulation. As the concentration increased, sodium ferrate preoxidation treatment of algae-containing water led to an increase in the formation potential of disinfection by-products(DBPs) such as trichloromethane, monochloroacetic acid and dichloroacetic acid. Therefore, in practical application, the dosage concentration should be strictly controlled.