The challenges of disinfection by-products brought by the upgrading of drinking water quality standards and the countermeasures
The improvement of national and local drinking water quality standards in China has added more items of disinfection by-products,tightened the standard limits and increased the detec-tion frequency.Meanwhile,the concentration of organic matter is still high in source water.These above situations have made DBPs an important water quality challenge faced by China's water sup-ply industry.This article summarizes the concentrations of typical DBPs such as trihalomethanes,haloacetic acids,and nitrosamines,in drinking water of representative cities in China according to open literature.The precursor components,sources,and characterization methods of the above-mentioned DBPs were introduced.Based on the data of pilot and real water treatment plants,DBP control strategies for water source regulation and in-plant control were proposed.Among them,strengthening coagulation precipitation,applying ozone and activated carbon advanced treatment,and optimizing disinfection processes are the key treatment processes for controlling the above-mentioned DBPs.
万方数据
维普
