原水紫外线预处理过程研究

Study on UV Irradiation for Pre-treatment of Raw Water

研究用低强度紫外线辐照方法对原水进行预处理的可行性.采用实验室小型实验装置,实验用紫外线波长为254nm辐照功率为0.5～4mW/cm2,辐照时间为1～32min.水质分析和分子探针细菌计数结果表明,短时间低功率的紫外线辐照预处理就能明显地抑制原水中细菌的活性,减缓原水溶解氧的消耗,避免在长距离输送中发生水质恶化现象.该研究对于用低功率紫外线技术代替传统的预加氯方法具有指导性意义.

This paper aims to explore the feasibility of using UV irradiation to pre-treat raw water for water supply.Laboratory tests were conducted with 254nm UV,0.5 mW/cm 2 to 4 mW/cm 2 ,1～32min irradiation time.The results with water quality analysis and molecular probe counting indicated that UV irradiation with short time and low power is able to significantly inhibit the bacterial activities in raw water,thus reducing oxygen consumption,avoiding the potential deterioration of raw water in long distance diversion.This paper is of guiding meaning for utilization of UV irradiation as a pre-treatment method instead of pre-chlorination.