DOI 10.35776/VST.2022.07.06
UDC 628.25

Skibo Denis, Chupin V. R., Ogniov Igor

Improving the environmental safety of wastewater disposal system on the basis of emergency storage tanks


A new structure is proposed – an emergency storage tank for wastewater pumping stations that provides for improving the environmental safety and controllability of the wastewater disposal system by regulating wastewater in underground storage facilities. Owing to the specific features the tank usable volume is filled with wastewater from gravity sewers; the wastewater is retained in it for a certain time and removed together with the sludge eliminating any additional pumping equipment. The range of application of the emergency storage tank extends to the systems for the disposal of domestic, storm and industrial wastewater. This innovative device should become an essential component of the municipal engineering infrastructure and meet environmental requirements for wastewater disposal. Structural solutions adopted in the development of a horizontal storage tank as the main multifunctional accumulating element are focused on the possibility of installing this structure in the built-up areas of the city, as well as in adverse hydrological conditions. To determine the usable volume of horizontal storage tanks the standard mathematical modeling approaches were used with the help of the approximation method. A method is proposed for calculating the storage capacity of the tank, as well as calculating the volume of the ballast chamber of a horizontal storage tank. The aspects of the resistance to floating up of underground elements are considered. The modular principle of the tanks design provides for installing it both by trenchless and cut-and-cover methods; whereas the available additional ballast opens the door for operating in difficult hydrological conditions. It is recommended to equip the existing and projected wastewater pumping stations with the developed emergency storage tank.

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