Best available technologies of wastewater treatment: implementation experience of «Mosvodokanal» JSC

Summary

Owing to the transfer to process standardization from 2019 (Federal Law No. 219-FZ) natural resource users are bound to introduce the best available technologies. Advanced technologies of municipal wastewater treatment ensuring the removal of nitrogen and phosphorus have been used in Russia at less than 10% of the wastewater treatment facilities. When transferring to process standardization many water utilities will face the problem of upgrading wastewater treatment facilities. Successful practical experience of water utilities where BATs have been already used at wastewater treatment facilities will be useful for choosing the optimal process flow scheme. The introduction of advanced wastewater treatment methods has been a priority task for «Mosvodokanal» JSC. For a long period the company has developed and adapted to the conditions of the Moscow wastewater treatment facilities the process flow scheme of wastewater treatment with the removal of nutrients (nitrogen and phosphorus) which is the best available technology. This made it possible to introduce this technology at the Lyuberetskie and Kuryanovskie wastewater treatment facilities – the largest and extremely large-scale facilities as well as at small- and mid-scale wastewater treatment plants in Minzag and Shchapovo settlements (Prefecture of Troitsky and Novomoskovsky Administrative Districts, Moscow). Experts of «Mosvodokanal» JSC developed a pre-design concept of the reconstruction of the aeration tanks at the treatment facilities of Cherepovets and the local treatment facilities of the Optina Pustyn monastery (Kozelsk, Kaluga Region) with the introduction of nutrients removal technology. The practical experience gained in «Mosvodokanal» JSC shows that the best available technologies have been developed, can be introduced and operate successfully.

Key words

best available techniques , sewerage treatment facilities , technological rate setting , wastewater biological treatment , nitrogen and phosphorus

Problems of designing biological treatment facilities with nitrogen and phosphorus removal

Summary

Ensuring the quality of effluent to the level of the most stringent regulatory requirements including the maximum permissible concentrations for fishery water bodies is the responsibility not only of engineering companies providing for professionally executed design solutions but also of the customers responsible for correctly compiled technical tasks, professional choice of effective technical and commercial proposals, competent operation of wastewater treatment facilities. The experience of operating wastewater treatment plants using nitrogen and phosphorus removal technologies makes it possible to assert that in this case a professional approach to the selection of contractors and operation on the part of the customers and to the design on the part of the contractors ensures the required quality of effluent. The problems arising at the design stage of wastewater treatment facilities and the choice of technical and commercial proposals are considered. Recommendations for their solution are given. The article is intended both for the process engineers of engineering companies and for the customers of projects who find it difficult to correctly choose the most effective design solution from a large number of proposed technical and commercial proposals.

Key words

wastewater , biological treatment , sewerage treatment facilities , nitrogen and phosphorus , design and calculation of nutrient removal facilities