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我国特别是北方寒冷地区的地表型水库原水普遍存在因腐殖质类有机物引起高色度的问题,采用液氯消毒的常规处理工艺很难满足人们对水质安全性的要求,为此,选择北方某自来水厂滤后水为处理对象,在中试条件下考察了砂滤/炭滤共同作用对腐殖质类有机物的去除效能。结果表明,砂滤/炭滤工艺可以有效去除原水中分子质量为1~5 ku、容易生成消毒副产物的有机物;在试验进水浊度为0.10~0.27 NTU、COD Mn为1.10~1.47 mg/L的条件下,出水浊度<0.10NTU、COD Mn降为0.43~0.79 mg/L,对浊度和COD Mn的平均去除率分别为59.07%和50.61%。
In our country, especially in the cold area of North China, the problem of high chroma is caused by the organic matter of humus in the raw water. It is difficult to meet the requirements of water quality safety by using the traditional liquid chlorine disinfection process. Therefore, After filtration, the treated water was treated under the conditions of pilot test, and the effect of sand filtration / charcoal filtration on the removal of humic substances was investigated. The results showed that the sand filter / carbon filter process can effectively remove organic matter with the molecular weight of 1 ~ 5 ku in raw water and easily produce disinfection byproducts. When the test water turbidity is 0.10-0.27 NTU, the COD Mn is 1.10-1.47 mg / L, the effluent turbidity was less than 0.10 NTU, the COD Mn was reduced to 0.43 ~ 0.79 mg / L, and the average removal rates of turbidity and COD Mn were 59.07% and 50.61%, respectively.