臭氧+混凝沉淀处理微污染水试验研究

Study on Treating Slightly-polluted Water with Ozone and Coagulative Precipitation Method

研究臭氧+混凝沉淀处理低温微污染水的净水效果。采用静态试验,改变臭氧投加量,接触氧化时间等参数,分别对比了CODMn、浊度和色度的去除效果。臭氧投加量为3 mg.L-1接触氧化时间为15 min时,沉淀后出水的高锰酸盐指数、浊度、色度比直接采用聚合氯化铝混凝的去除率分别提高了5.4%、20.3%和20.1%.对于低温微污染水源水,臭氧+混凝沉淀工艺能有效地去除有机物、浊度、色度,使处理后水质达到饮用水水质标准。

In this article, the treatment effect of Slightly-polluted Water with ozone and coagulative precipitation method was studied. The influences of dosages of ozone and oxidation time on ozone pre-oxidation and oxidation efficacy on the basis of conventional water treatment process were analysed by beaker static test. When the dose was 3 mg · L^-1 and oxidation time was 15 min , the removal rates of CODMn, turbidity , color of water after precipitation were increased about 5. 4% ,20.6 %, 20. 1% higher than the resulted from the use of PAC directly. The results showed that ozone per-oxidation on slight-polluted water at low temperature could remove lots of organic effectively, turbidity, color and slight-pollution significantly to make the treated water quality reach standard.