控制配水管网中细菌再生长的AOC浓度研究

Study on AOC Criteria to Control Bacterial Regrowth in Drinking Water Distribution System

研究了配水管网中AOC浓度与细菌再生长的关系,以确定控制细菌再生长的AOC标准。结果表明:最大AOC浓度与最大HPC呈线性关系,当AOC<57μg/L时,管网水中的营养基质难以维持悬浮菌的生长;最大AOC浓度与AOC最大消耗量也呈线性关系,当AOC<43.8μg/L时AOC没有被消耗,即细菌不生长。结合已有的AOC控制标准,推断在采用加氯消毒的管网中,控制AOC<40μg/L能够确保饮用水的生物稳定性。

The relation between the AOC concentration and bacterial regrowth in the drinking water distribution system was investigated in order to obtain the AOC criteria. The results show that there is a linear relationship between the maximum HPC and the maximum AOC concentration. The nutrient substrates in the system cannot support bacterial growth when AOC is less than 57μg/L. Another linear relationship is observed between the maximum AOC concentration and the maximum AOC consumption. The bacteria growth and AOC utilization do not occur when AOC is less than 43.8 μg/L. Considering the existing AOC control criteria, it is concluded that controlling AOC at less than 40 μg/L can ensure the biostability of drinking water when using chlorine disinfectant.