Research on biological stability of water distribution system in northern area and correlative influencing factors

Abstract:

To study the correlation between traditional water quality indexes and BDOC,the biological stability of drink water in a northern city water system was investigated and evaluated by BDOC.When the conentration of BDOC is between 0.11 mg/L and 0.40 mg/L,the water is in biological steady level.BDOC changed a few from the entry to the end in the network.Among traditional water quality indexes,turbidity presents a positive correlation with BDOC,while pH shows a negative correlation.The charges of BDOC and residual chlorine should be combined together to control bacteria re-growth in the network,not merely depending on the biological index.