村镇供水中臭氧消毒副产物溴酸盐 生成规律研究

结合村镇供水特点，本文采取三种投加方式对9省63份作为饮用水水源的地下水水样进行臭氧投加试验，考察了不同地区的水样消毒后生成溴酸盐浓度水平的差异，研究了臭氧投加量、投加方式对溴酸盐生成浓度的影响。结果表明：原水溴离子浓度越低，pH值越低，投加臭氧后生成的溴酸盐量也较小；溴酸盐生成量与臭氧投加量在一定范围内呈线性正相关关系。同一投加量下，三种臭氧投加方式对应的溴酸盐生成量由小到大依次为：投加高浓度臭氧水、水射器投加、直接通入臭氧气体。

Study on formation law of byproduct——bromate during ozone disinfection for rural drinking water supply

In accordance with the characteristics of rural drinking water supply， the ozone adding experiment on the groundwater samples from 63 water sources for the rural drinking water in 9 provinces is made with three ozone dosing methods， and then the difference among the levels of bromate concentrations formed after the disinfections of the water samples from various areas is investigated and the impacts from both the ozone dosing and the dosing method on the bromate forming concentration are studied. The result shows that the less the bromonium ion concentration of the raw water is， the lower the pH value is to be， and then the less content of the bromate formed after ozone adding is to be as well， while the bromate formation shows linear positive correlation with the ozone dosage with a certain range. Under an identical dosing， the bromate formations corresponded to the three ozone dosing methods， i.e. adding high concentration ozone water， adding by water-jet， direct adding of ozone gas， vary in an order from less to large.