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UDC 628.316:66.081.63

Pervov A. G., Matveyev N. A.

The use of membranes for surface runoff and recycling car wash water treatment

Summary

The results of investigating the technology of surface runoff and recycling car wash water treatment with the use of reverse osmosis systems equipped with specially designed membrane units with «open» channel that provide for processing water with high concentration of suspended matter are presented. For processing raw wastewater in the membrane unit two concentrating stages are used: at the first stage – reverse osmosis membranes that ensure high quality treatment, and at the second stage – nanofiltration membranes that ensure concentrating solutions with high salt content with the minimum power consumption. The specific feature of the technology is in the utilization of the reverse osmosis concentrate that is removed from the system together with wet sludge. The results of the laboratory studies of storm water membrane treatment with the use of special roll elements with «open» channel and new BLF membranes are presented. It is stated that increasing permeate output to 0.9 results in 2.5–3-fold decrease of the equipment capacity. Car wash water undergoes the same treatment. The pilot tests show that increasing salt concentration in recycling water higher than 17 000 mg/l is impractical. The relationships of the increase of pollutant concentration in permeate and membrane capacity depending on the increase of the salt content in water under treatment and the ratio of volume concentrating in a reverse osmosis unit are presented. The parameters of membrane units operating with wastewater of this type with efficient removal of oil products, detergents and other pollutants are determined. Possible utilization of concentrate is shown.

Key words

suspended substances , filtrate , oil products , concentrate , reverse osmosis , surface runoff

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REFERENCES

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5. Pervov A. G., Andrianov A. P., El’piner A. I., Kocharian A. G. [The use of reverse osmosis as a universal method of wastewater treatment – the key to water reuse and reduction of surface water pollution]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2010, no. 5–6, pp. 54–63. (In Russian).
6. Pervov A. G. [Solving the problem of wastewater discharge of stand-alone industrial facilities]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2011, no. 11, pp. 15–24. (In Russian).