微污染水生物陶粒滤池预处理研究

A Study of Pre-Treatment of Slightly-Polluted Water with Biological Ceramsite Filter Tank

采用生物陶粒滤池对天津引滦水进行预处理.小试结果表明,在水力停留时间15 min,滤速5.0m/h,原水ρ(CODmn)为3.2～10.6 mg/L,浊度为6.90～73.7 NTU,ρ(叶绿素)为1.96～27.0μg/L,ρ(氨氮)为0.016～0.076mg/L,ρ(亚硝酸盐氮)为0.007～0.032 mg/L的条件下生物陶粒滤池时CODmn、浊度、叶绿素、氨氮、亚硝酸盐氮的平均去除率分别为15.6%,42.3%,40%,38%,50%.色-质联机分析结果表明,生物陶粒预处理对原水中的优先控制污染物有较好的去除能力,使微污染原水中有毒有害有机物的种类和含量明显降低.

Biological ceramsite filter tank was used in Tianjin for the pre-treatment of the water introduced from the Luan River. The results of small-scale tests showed that under the conditions that the hydraulic residence time was 15 min, the filtering velocity was 5.0 m/h, the ρ(CODMn), turbidity, ρ(chlorophyll), ρ(ammonia nitrogen) and ρ(nitrite nitrogen) of the raw water were 3.20 ~ 10.6 mg/L, 6.90 ~ 73.7NTU, 1.96 ~ 27.0 μg/L, 0.016~ 0.076 mg/L and 0.007 ~ 0.032 mg/L respectively, the average rates of removal of CODMn, turbidity, chlorophyll, ammonia nitrogen and nitrite nitrogen by biological ceramsite filter tank were 15.6%, 42.3%, 40%, 38% and 50% respectively. It was shown by the results of color-quality on-line analyses that the pre-treatment with biological ceramsite had a good removing capacity toward the pollutants in the raw water to be preferentially controlled, and significantly reduced the varieties and contents of toxic and harmful organisms in slightly-polluted raw water.