表面分子印迹聚合物修饰TiO_2纳米管去除污水厂二级处理出水中雌激素试验

制备了基于表面分子印迹聚合物修饰的TiO2纳米管（S-MIP—TiO2NTs）光催化剂，并利用SEM和FT-IR手段进行了表征。结果表明S—MIP—TiO2NTs的平均粒径为60nm，针对模板分子，相对于修饰前的TiO2纳米管（Ti02NTs），S—MIP—TiO2NTs的吸附选择性和光催化性能得到了提高。相对于高浓度范围（10～100mg／L），在低浓度范围（10～100μg／L）内S—MIP—TiO2NTs显示出较高的吸附催化性能。利用S—MIP—TiO2NTs可以去除尾水中部分代表性的雌激素，同时还具有较好的再生性能。

污水厂尾水再生利用深度处理组合工艺效果分析

为了考察臭氧-混凝-机械加速澄清池-紫外再生水深度处理组合工艺的处理效果,对北京市某再生水厂各工艺单元的进、出水常规指标、有机物及指示病原微生物的去除进行了研究。结果表明,组合工艺对色度、浊度、有机物及指示病原微生物都具有较好的去除效果。当进水CODCr为19.6-29.6 mg/L、色度为24-28度、浊度为2-3 NTU、总大肠杆菌和粪大肠杆菌为106 cfu/L时,出水CODCr〈20 mg/L、色度〈15度、浊度〈1 NTU、粪大肠杆菌〈3 cfu/L,出水水质可满足回用水的水质要求。

Impact of Suspended Particles and Enhancement Techniques on Ultraviolet Disinfection of a Secondary Effluent

The concentration of suspended solids in the secondary effluent often varies widely, leading to frequent adjustment of the UV dosage to meet the disinfection criterion. In addition, a desired disinfection rate is difficult to achieve sometimes. The authors studied the particle size distribution, contribution of particle-associated Fecal Coliform (F.C.), and their influences on UV disinfection. A combined disinfection process (chlorination with a subsequent UV disinfection) was tested to improve the disinfection effect. The results indicated that the content of suspended solids, especially that of large particles, has a strong impact on UV disinfection efficiency; D>10 μm particles associated F.C. are difficult to be disinfected and are the main part of the tailings of F.C. inactivation curves. Pre-chlorination could decrease the number of particles in the secondary effluent and transform the large particles into small ones, reducing the influence of particles on UV disinfection and enhancing the resistance ability of the combined process to particle loading.