Minimizing the flow of the membrane unit concentrate
in the process of surface runoff and drain water treatment and reuse

Summary

Possible treatment of surface runoff and drain water collected from the territory of an industrial enterprise using the method of reverse osmosis and nanofiltration is studied. Reuse of effluents provides for eliminating the payment for the environmental damage resulting from discharges into surface water bodies. The studies on determining the possible use of a membrane nanofiltration system for surface runoff and drain water treatment and reuse in preparing feedwater for water-heating boilers are described. An important characteristic of the technology is the minimum acceptable flow of membrane unit concentrate discharged into the sewer. The results of experiments are presented that provide for determining the intensity of calcium carbonate crystallization in the channels of membrane units, as well as the results of studying with a scanning electron microscope the formation of crystals in the concentrate flow.

Key words

reverse osmosis , nanofiltration , scaling on membranes , surface runoff and drain water of industrial sites , water treatment schemes with membrane use , reducing concentrate flow in reverse osmosis units