The Limiting Effects of Nutrients on Bacterial Regrowth in Drinking Water

[Objective] The aim of the study was to compare limiting effects of various nutrients on bacterial regrowth in drinking water.[Method] Bacterial regrowth potential(BRP) method was used to investigate the limiting effects of carbon,phosphorus,nitrogen and other minerals on bacterial regrowth in drinking water.[Result] BRP was increased when nutrients was added to the water sample.Bacterial regrowth in drinking water would be limited by various nutrients jointly.The limiting effects of different nutrients was depended on the concentration ratios among various nutrients,and varied with water treatment processes.[Conclusion] Carbon had a stronger limiting effect than other nutrients in the source water,treated water and advanced treatment effluent investigated in the experiment,which indicated that carbon was the primary limiting nutrient on bacterial regrowth in drinking water in Tai Lake district.