Abstract:

Due to operating conditions and environmental conditions, influent water of reverse osmosis is unqualified (pollution index of reverse osmosis membrane is high). Ultrafiltration tank has to be flushed frequently,  which results in the increase of workload , water resources and operating costs. By optimizing the dosing position and dosing strategy of the reverse osmosis nonoxidizing biocide, the number of unqualified  reverse osmosis water is greatly reduced. The influent water quality is effectively controlled,  waste and operating cost are significantly reduced. It also improves the economy and the reliability of reverse osmosis equipment , which can provide reference for the similar projects.

Key words:

reverse osmosis, reverse osmosis membrane, silting density index (SDI), nonoxidizing biocide, microorganism, economy