DOI 10.35776/VST.2022.05.06
UDC 628.356

Matуushenko Evgeny, Rebitva Sergei, Borisova Kristina

Wastewater treatment of a cottage estate. Design and operational errors


The principle of operation, as well as the errors while designing and operating a compact wastewater treatment plant with a design capacity of 500 m3/day (actual flow rate is 250–280 m3/day) are considered. The treatment facilities have been designed in two phases and include the stages of mechanical and biological treatment, followed by tertiary treatment in biofilters with expanded clay media, and UV disinfection of the effluent after biological treatment. Gravity sludge thickeners and dehydrators are provided for processing the resulting sludge. Upon the detailed consideration of the design solutions, as well as the problems revealed during the operation, design errors were identified that made it impossible to ensure the required quality of wastewater treatment. Currently, to enhance the operation of the complex, a number of facilities are being upgraded. This will provide for reaching the stable operation of the complex and ensuring the standard indicators at the MPC level for organic and suspended solids in the effluent before being discharged into a water body.

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