№4|2019

WASTEWATER TREATMENT

bbk 000000

UDC 628.315.2

Ambrosova G. T., Timofeev S. L., Rafal'skaia T. A., Mansurov R. Sh., Kruglikova A. V.

Impact of natural and climatic factors on the efficiency
of open wastewater treatment facilities operation

Summary

The problem associated with the impact of natural and climatic factors on the efficiency of wastewater treatment in open treatment facilities is considered. The analysis of methods for calculating the basic units for mechanical treatment (primary settling tanks) and biological treatment (aeration tanks and secondary settling tanks) of municipal wastewater is presented. It is indicated that at the design stage of the complexes it is important to calculate correctly the temperature of the incoming wastewater. The long-term practice of operating municipal wastewater treatment facilities has shown that with a long retention time in open facilities waste liquid can be cooled during the cold period of the year and heat up to about 1.5–6 °C during the warm one. In the first case this negatively affects the processes of sedimentation of suspended solids in settling tanks and oxidation of organic substances in aeration tanks; whereas in the second case this negatively affects the saturation of mixed liquor in aeration tanks with oxygen resulting in a reduced treatment level. The purpose of the work was to develop recommendations that allow at the design stage of wastewater treatment facilities to correctly calculate the temperature of waste liquid in open structures for a certain project that has specific climatic conditions. To achieve this goal the data of laboratory and in-process control of the operating wastewater treatment complexes were analyzed. A theoretical analysis of the currently used methods for designing wastewater treatment facilities has been made; research has been carried out at the operating facilities. Mathematical models widely used in heat engineering have been studied to determine heat losses from the open surface and through enclosing structures as well as the heat input from solar energy and exothermic reactions.

Key words

, , , , , , ,

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

REFERENCES

  1. Henze M. Ochistka stochnykh vod [Wastewater treatment. Мoscow, ASV Publishing House, 2006, 480 p.].
  2. Iakovlev S. V., Voronov Iu. V. Vodootvedenie i ochistka stochnykh vod [Wastewater disposal and treatment. Мoscow, ASV Publishing House, 2002, 703 p.].
  3. Ambrosova G. T., Kruglikova A. V. [Impact of natural conditions on the efficiency of wastewater treatment facilities operation]. Biosfernaia Sovmestimost’: Chelovek, Region, Technologii, 2016, no. 4 (16), pp. 3–12. (In Russian).
  4. Shaptala M. V., Shaptala D. E. [Development of a mathematical model of heat mass exchange in an open swimming pool. Science and transport progress]. Vestnik Dnepropetrovskogo Natsional’nogo Universiteta Zheleznodorozhnogo Transporta, 2014, no. 6 (54), pp. 113–118. (In Russian).
  5. Bekhovykh L. A., Makarychev S. V., Shorina I. V. Osnovy gidrofiziki [Basics of hydrophysics. Barnaul: AGAU Publishing House, 2008, 172 p.].
  6. Kulzhinskii Iu. I. Opredelenie teplopoter’ cherez ograzhdaiushchie konstruktsii podzemnykh sooruzhenii [Determination of heat losses through enclosing structures of underground facilities. Мoscow, Military Engineering Red Banner Academy named after V. V. Kuibyshev Publ., 1960, 63 p.].
  7. Iakovvlev S. V., Kariukhina T. A. Biokhimicheskie protsessy v ochistke stochnykh vod [Biochemical processes in wastewater treatment. Мoscow, Stroiizdat Publ., 1980, 200 p.].

vstmag engfree 200x100 2

mvkniipr ru

Российская ассоциация водоснабжения и водоотведения

Конференция итог

ecw20 200 300

VAK2