The influence of the pre-ozonization on the formation of disinfection by-products (DBPs) upon chlorination for fresh waters containing three common cyanobacteria, namely Microcystis aeruginosa, Anabaena aequalis and Oscillatoria tenuis at 10,000 cells/mL is reported. Specifically, the formation carbonaceous-DBPs (C-DBPs) (trihalomethanes (THMs), haloacetic acids (HAAs) and haloketones (HKs)) and nitrogenous-DBPs (N-DBP) (haloacetonitriles (HAN) and trichloronitromethane (TCNM)) has been determined as a function of the pH (6.5 or 8.0 and bromide ion concentration (300 μg/L). The main C-DBPs were THMs and HAAs with negligible formation of HKs accompanied by minor amounts of HANs in the absence of TCNM. Pre-ozonation of the aqueous cyanobacteria suspensions does not allow a control over all the DBPs. In fact, pre-ozonation increases THM formation and generates TCNM, has low influence on HAAs and only decreases the formation of HANs. The overall conclusion of this work is that pre-ozonation of waters containing a relatively low concentration of common fresh water cyanobacteria is not an appropriate process to decrease DBP formation from chlorine. Cyanobacteria removal from raw water before chlorination or ozonation should reduce DBP formation.

据报道，预臭氧化对含三种常见蓝藻细菌的铜绿微囊藻，铜绿鱼腥藻和ten小球藻的氯化作用为10,000细胞/ mL时，氯化后消毒副产物（DBPs）形成的影响。具体而言，碳质DBP（C-DBP）（三卤甲烷（THM），卤乙酸（HAAs）和卤代酮（HKs））和含氮DBP（N-DBP）（卤乙腈（HAN）和三氯硝基甲烷（TCNM））的形成可以根据pH（6.5或8.0）和溴离子浓度（300μg/ L）来确定，主要的C-DBPs是THMs和HAA，在没有TCNM的情况下，形成的HKs很少，伴随着少量的HANs。水性蓝藻悬浮液的臭氧化作用无法控制所有DBP。预臭氧化可增加THM的生成并生成TCNM，对HAA的影响较小，仅会减少HANs的形成。这项工作的总体结论是，对含有相对较低浓度的普通淡水蓝细菌的水进行预臭氧处理并不是减少氯气中DBP形成的合适方法。在氯化或臭氧化之前从原水中去除蓝细菌应减少DBP的形成。