净水过程中亚硝酸盐氮增高原因分析及处理方法

Reason and Treatment Method for the Increasment of Nitrite Nitrogen in Treated Water from Water Treatment Works

分析了水厂净水过程中出水的亚硝酸盐氮的增高趋势,分析结果表明,亚硝酸盐氮的增高与滤前加氯关系密切,在沉淀池和滤池中更为明显,滤前投氯量在1.0mg/L可使出厂水亚硝酸盐氮的含量达到当地夏季的水质要求。

Increasement tendency of nitrite nitrogen in treated water of water treatment works was analysed. Result shows that the increasement of nitrite nitrogen has close relations with chlorination before filtration, and it is more obvious in settling tank and filter. The concentration of nitrite nitrogen in treated water can meet the water quality requirements in summer when chlorine dosage is at 1.0 mg/L before filtration.