预氧化—混凝—复合滤料组合工艺处理含剑水蚤水源水试验研究

Study on Treatment of Cyclops-containing Water From Water Resources by Combined Process of Preoxidation and Coagulation and Composite Filter Media

经检测,大伙房水库水源水在8～18℃温度范围时含有剑水蚤。本试验采用预氧化—混凝—复合滤料组合工艺达到完全去除剑水蚤的目的,并分别对预氧化、混凝、复合滤料过滤三个水处理工艺单元以及预氧化—混凝—复合滤料组合工艺对剑水蚤的去除效果进行了探究。在PAC投加量为10mg/L、ClO_2投加量为0.2mg/L、采用ΣL/d=1078的无烟煤—石英砂复合滤料的试验条件下,平均出水浊度为0.5NTU,剑水蚤去除率达到100%。在持续4个月的试验过程中,取得了良好的处理效果。试验证明含剑水蚤水源水适合采用预氧化—混凝—复合滤料组合工艺进行降浊除蚤处理。

The water source of Dahuofang reservoir contains water fleas at temperatures ranging from 8 ℃ to 18 ℃. In this experiment, the combined process of preoxidation-coagulation-composite filter material was used to completely remove cyclops. The cyclops removal effects of three water treatment units, namely pre-oxidation, coagulation and composite filter material, and the combined process of preoxidation-coagulation-composite filter material were investigated. The results showed that, when PAC dosage was 10 mg/L, ClO2 dosage was 0.2 mg/L and anthracite-quartz of L/d=1078 was used as sand composite filter material, average effluent turbidity was 0.5 NTU and the removal rate of cyclops was 100%. Good treatment results were achieved in the four-month experiment. The experiment has proved that the combined process of preoxidation-coagulation-composite filter material is suitable for turbidity reduction and flea removal of water containing cyclops.