3种臭氧双层滤料滤池对水中有机物及氨氮去除效果研究

Study on Removal of Organic Matter and Ammonia-Nitrogen in Water by Three Kinds of Ozone/Dual Media Filters

针对平原水库夏季有机物及氨氮含量高的问题进行了研究。采用滤前曝臭氧的方式,改变上层滤料的类型,对比3种滤池对水中有机物及氨氮的去除效果。结果表明,在臭氧处理前水的pH为6.84~7.32,COD_(Mn)为6.1~7.3mg/L、UV254为0.162~0.194 cm^(-1)、NH_3-N的质量浓度为1.5~2.0 mg/L的条件下,臭氧-煤砂滤池对水中COD_(Mn)、UV_(254)及NH_3-N的去除率分别为60.5%、87.3%和73.2%,臭氧-活性无烟煤-砂滤池对水中COD_(Mn)、UV_(254)及NH_3-N的去除率分别为81.3%、93.4%和88.3%,臭氧-炭砂滤池对水中COD_(Mn)、UV_(254)及NH_3-N的去除率分别为84.5%、95.2%和92.2%。3种滤池对浊度的去除率达到93%以上。相比传统煤砂滤池,采用臭氧与活性滤料联用能够提高滤池的生化性能,对季节性高有机物、高氨氮含量原水有较好的处理效果。

In this paper the problem of high organic matter and ammonia-nitrogen content in plain reservoir was studied.The effect on removal of organic matter and ammonia-nitrogen in water were compared by altering the types of upper media.The results show that,in the condition of pre-ozoned water whose pH ranged from 6.84 to 7.32,COD_（Mn） from 6.1~7.3 mg/L,UV_（254） from 0.162~0.194 cm^（-1） and mass concentration of NH_3-N from 1.5~2.0 mg/L,the removal efficiencies of COD_（Mn）,UV_（254） and NH_3-N were 60.5%,87.3% and 73.2% respectively by ozone/anthracite-sand filter.The corresponding removal rates were 81.3%,93.4% and 88.3% respectively by ozone/activated anthracite-sand filter as well as 84.5%,95.2% and 92.2% respectively by ozone/activated carbon-sand filter.The removal efficiency of turbidity could be 93%above.Compared to conventional anthracite-sand filters,biochemical properties could be upgraded adapting active media combined with ozone,which was somehow well to the treatment of seasonal raw water containing high organic matter and NH_3-N content.