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针对高藻期水源水存在的水质问题,结合其水质特点,利用小试和中试结合的方法研究应对高藻水源水的粉末活性炭吸附预处理技术,具体包括优选最佳的活性炭种类、确定相应的应用方案、分析其处理效能。研究结果表明,用于高藻期水源水处理的最佳粉末活性炭应该具有相对较发达的中孔和微孔,同时具有一定含量的含氧官能团;活性炭的投加量应在15 mg/L以上,并保证有30 min以上的接触时间,同时适当增加混凝剂的使用量,此时对微囊藻毒素、土臭素、2-MIB的去除率分别为90%、86%、93%,还可在一定程度上改善混凝沉淀单元对藻类的去除率,维持滤池的正常运行;使用粉末活性炭预处理时,应尽量避免与预氧化工艺组合使用,如果的确需要组合使用,两工艺应间隔适当的距离。
In view of the water quality problems in high algae water source water, combined with the characteristics of its water quality, this paper studied the pretreatment technology of activated carbon adsorption on algae water by using the combination of pilot and pilot tests, including the optimal activated carbon species, The application program, analyze its processing efficiency. The results show that the optimum powdered activated carbon used for water treatment in high-algae period should have relatively well-developed mesopores and micropores and a certain amount of oxygen-containing functional groups. The dosage of activated carbon should be above 15 mg / L , And to ensure a contact time of 30 min or more, while appropriately increasing the amount of coagulant used, the removal rates of microcystins, geosmin and 2-MIB were 90%, 86% and 93% respectively To some extent, improve the coagulation sedimentation unit of algae removal rate, to maintain the normal operation of the filter; the use of powdered activated carbon pretreatment, should be combined with the pre-oxidation process should be avoided, if indeed need to be used in combination, the two processes should be spaced Appropriate distance.