bbk 000000

UDC 628.35:661.5

Stepanov S. V.

Specific features of designing oil refinery wastewater biological treatment facilities

Summary

Oil refinery wastewater is characterized by the presence of organics resistant to oxidation and practically total absence of phosphorus. The procedure of designing oil-containing wastewater biological treatment with nitrification-denitrification is used both for aeration tanks and membrane bioreactors. Designing is carried out with the use of kinetic relationships for all the regulated pollutants. During the experiments kinetic constants and coefficients of nitrification and denitrification processes, oxidation of organic substances (as BOD and COD), oil products, phenols and synthetic surfactants for waste­water of a number of oil refineries were obtained. Calculations algorithm includes the following stages: determining initial data – pollutant concentrations and wastewater flow rates; choosing the process flow scheme of the treatment facilities; calculating specific rate of biological treatment process on the basis of kinetic constants and coefficients; calculating activated sludge growth, nitrogen and phosphorus losses in the process of assimilation; estimating the retention time for oxidation of separate ingredients of pollutants and denitrification; determining the maximum aerobic process time in respect to the limiting component and treatment level in respect to other ingredients; calculating the required air consumption; checking the necessity of dosing phosphorus compounds for nutrient makeup. To improve the denitrification efficiency the configuration of the facilities was enlarged with a mixed liquor deaerator. The process design of a membrane bioreactor differs from the design of aeration tanks with nitrification-denitrification by correction of specific oxidation rate with account of the obtained kinetic constants and coefficient of inhibition with metabolism products at higher concentrations of activated sludge in the bioreactor. The experimental results allowed supplementing the procedure of designing wastewater biological treatment facilities with nitrification-denitrification developed by NII VODGEO.

Key words

wastewater , biological treatment , nitrification , activated sludge , membrane bioreactor , denitrification , oil refinery , kinetic constant

The further text is accessible on a paid subscription.
For authorisation enter the login/password.
Or subscribe

REFERENCES

1. Iakovlev S. V., Kariukhina T. A. Biokhimicheskie protsessy v ochistke stochnykh vod [Biochemical processes in wastewater treatment. Moscow, Stroiizdat Publ., 1980. 200 p.].
2. Iakovlev S. V., Skirdov I. V., Shvetsov V. N., Bondarev A. A., Andrianov Iu. N. Biologicheskaia ochistka proizvodstvennykh stochnykh vod: protsessy, apparaty i sooruzheniia [Biological treatment of industrial wastewater: processes, equipment and facilities. Moscow, Stroiizdat Publ., 1985. 208 p.].
3. Ponomarev V. G., Ioakimis E. G. Obrazovanie i ochistka stochnykh vod neftepererabatyvaiushchikh zavodov [Formation and treatment of oil refinery wastewater. Moscow, Soiuz Dizain Publ., 2009. 352 p.].
4. Shvetsov V. N., Morozova K. M. [Procedure of designing biological treatment facilities with nutrients removal]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2013, no. 11, pp. 42–47. (In Russian).
5. Morozova K. M. [Principles of designing wastewater biological treatment systems]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2009, no. 1, pp. 26–31. (In Russian).
6. Stepanov S. V., Strelkov A. K., Blinkova L. A., Morozova K. M., Beliakov A. V. [Investigating the processes of single-stage biological treatment of oil refinery wastewater]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2013, no. 10, pp. 38–44. (In Russian).
7. Antonov I. N., Zhigareva T. N., Razumov A. I., Shvetsov V. N. [Nitrification-denitrification of wastewater at the Velikiy Novgorod wastewater treatment facilities]. Ekologiia i Promyshlennost’ Rossii, December 2009, pp. 14–17. (In Russian).
8. Stepanov S. V., Strelkov A. K., Stashok Iu. E., Baumgarten S., Sheren’ I., Khar’kina O. V. [Treatment of Syzran’oil refinery industrial wastewater in membrane bioreactor]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2012, no. 3, pp. 66–72. (In Russian).
9. Stepanov S. V., Strelkov A. K., Stashok Iu. E., Dubman I. S., Beliakov A. V. [The experience of designing oil refinery wastewater treatment facilities]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2013, no. 8, p. 34–43. (In Russian).
10. Stepanov S. V., Strelkov A. K., Blinkova L. A., Morozova K. M., Beliakov A. V. [Estimating kinetic constants for the process of biochemical treatment of oil refinery wastewater]. Vodosnabzhenie i Sanitarnaia Tekhnika, 2013, no. 2, pp. 46–50. (In Russian).