臭氧—活性炭工艺在东北低温高色度条件下的应用与效果

Application and effect of ozone activated carbon process in high chroma raw water conditions in cold regions of Northeast China

臭氧-活性炭工艺在东北寒冷地区的应用较少。某净水厂工程项目位于黑龙江省,针对原水水温低、色度较高及微污染问题,采用了臭氧-活性炭工艺,其主要设计参数:预臭氧投加量为0.5～1.5mg/L,主臭氧投加量为1.5～2.5mg/L,絮凝池停留时间为20min,沉淀池上升流速为1.63mm/s,V型滤池滤速为6.8m/h,活性炭池滤速为5.5m/h。净水厂投产2年后的水质检测表明,臭氧-活性炭工艺在冬季取得了良好的运行效果,出水水质达到国标要求。

The ozone activated carbon process is less used in cold regions of the northeast. The site of this water purification plant project is located in Heilongjiang Province. For the problems of low water temperature, high chroma and micro pollution, the ozone activated carbon process is adopted. The main design parameters are as follows:the pre-ozone dosage is 0.5.1~5mg/L, the dosage of main ozone is 1.5~2.5 mg/L,the residence time of flocculation tank is 20 min, the rising flow rate of sedimentation tank is 1.63mm/s, the filtration rate of V-type filter is 6.8m/h, and the filtration rate of activated carbon filter is 5.5m/h.After the water purification plant was put into production for 2 years, the ozone-activated carbon process achieved good operation results in winter, and the effluent water quality reached the national requirement.