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以珠江水为原水,采用微絮凝-大梯度磁滤工艺和传统给水处理工艺对原水进行处理,比较两工艺对水中COD_(Mn)、大肠杆菌和细菌总数的去除效果;并以次氯酸钠对处理后的水进行消毒,研究大梯度磁滤技术对消毒剂的减量及消毒副产物生成量的影响。结果表明,微絮凝-大梯度磁滤工艺对水中COD_(Mn)、大肠杆菌和细菌总数的处理效果显著,去除率分别为61.6%、99.9%和94.4%,明显优于传统给水处理工艺;次氯酸钠的投加量为3 mg/L时能满足GB5749-2006消毒要求,传统工艺则需要4 mg/L;消毒2 h时三卤甲烷生成量为3.80μg/L,比传统工艺低0.66μg/L;微絮凝-大梯度磁滤工艺对减少消毒剂的投加和消毒副产物生成量的控制起到很好作用。
Taking Pearl River water as raw water, the raw water was treated by micro-flocculation-large gradient magnetic filtration and traditional water treatment, and the removal efficiencies of total COD, Mn, E. coli and bacteria in the two processes were compared. After treating with sodium hypochlorite Of water disinfection to study the effect of large gradient magnetic filtration on disinfectant reduction and disinfection byproduct production. The results showed that the effect of micro-flocculation-large gradient magnetic filtration on the total COD, Mn (Mn), bacteria and total bacteria in water was significant, with removal efficiencies of 61.6%, 99.9% and 94.4%, respectively, which were significantly better than those of traditional water treatment process. Sodium hypochlorite Dosage of 3 mg / L can meet the GB5749-2006 disinfection requirements, the traditional process requires 4 mg / L; disinfection 2 h trihalomethanes generation was 3.80μg / L, lower than the traditional process 0.66μg / L Micro-flocculation-a large gradient magnetic filtration process plays a good role in reducing the dosage of disinfectant and controlling the generation of disinfection by-products.