UDC 628.85
DOI 10.35776/VST.2026.04.06

Razakov M. A.

Specifics of ensuring the warm air parameters of microclimate
in the local wastewater pumping stations

Summary

The specifics of modeling of warm air conditions in the pumping compartment of a local wastewater pumping station is presented. Calculated values for incoming air temperatures at an average room temperature of +5°C are determined. The required thermal output of air heaters for the input ventilation system is presented for two heating system configurations for the pumping compartment of a pumping station. The main characteristics and assumed values of additional auxiliary coefficients used in modeling air-heating processes in the local wastewater pumping station are described in detail. A review of possible supply and exhaust system configurations for the facilities under consideration is provided. A flash estimate of the supply air temperatures is provided for air- and combined heating with electric cable. This work is of interest to companies specializing in the design, operation, and sales of local pressure wastewater disposal systems for buildings and structures.

Key words

sewerage pumping station , pump , ventilation system , electric motor , air-heating process , microclimate control system

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UDC 628.112.24:621.671

Shchavelev A. S., Zakharov V. A., Nikitin V. I.

Deep-well pumping units at the Velizhany water treatment facilities of Tumen

Summary

Centrifugal submersible pumps are designed for installation in deep wells, open pits and different reservoirs. The pumps ensure high pressure of the pumped clean water with a small sand concentration. Deep-well pumps are widely used both for domestic and industrial purposes (e. g. for automatic water supply, garden irrigation, in firefighting systems etc.). Deep-well pumping units have been used at the Tumen Vodokanal facilities from the beginning of 1980-ies in response to the need of deep underground water abstraction. The story of establishing the production of APVM and ETSV deep-well pumping units at the premises of the mechanical repair department of «Tumen Vodokanal» LLC is described. The problems related to their production and operation are designated. The succeeding introduction of advanced energy efficient equipment manufactured by Wilo German company and SAER Italian company is considered, the results of their operation are presented. Replacing ETSV pumping units with Wilo and SAER energy efficient pumps provided for reducing the energy intensity at the water intake facilities of the Velizhany water treatment plant by 23.8%. The results of pilot operation of Ciris CRS10-65/3 deep-well pumping unit manufactured by Livnynasos OJSC at one of the Tumen water intakes are summarized. The operation of deep-well pumping units made of high quality anticorrosive materials allowed three-fold reduction of repairs and hence significantly decrease of the operation and maintenance expenditures at the intake pum­ping station of the Velizhany water treatment facilities.

Key words

power saving , well pump , impeller , domestic water supply , electric motor