Name

First full-scale implementation of a new continuous biofilm process for nutrient removal

Speakers

Tomasz Skonieczny

Authors

Fernando Morgan-Sagastume, Tomasz Skonieczny, Christian Rosen and Maria Piculell, AnoxKaldnes - Veolia Water Technologies AB, Sweden
Carina Cupit Bayley, Veolia Water Technologies - Kruger A/S, Denmark
Diani Britto, Fors A/S, Denmark

Description

A newly developed moving-bed biofilm technology (Cella™, AnoxKaldnes -Veolia) was implemented for nitrogen removal at full scale in Denmark (Svinninge WWTP; load = 4500PE) in 2024, as part of an innovation project (KROBIO Hybrid, funded by the Danish Environmental Protection Agency). In collaboration with the Danish utility Fors and Krüger A/S (Veolia), the Cella plant (Design: 2000PE) was installed and commissioned parallel to the existing activated sludge process to increase the capacity of the plant. The new process comprises two tanks of 167m3, operated in series or parallel with intermittent aeration to allow for aerobic, anoxic and anaerobic conditions under continuous flow in the same tanks. The microbial biofilm grows on a high-surface-area, bio-based support material made of recycled biomass, which is kept in suspension by efficient aeration (fine-bubble) and mixing systems, and retained using a reactor-internal separator. The process is controlled by Hubgrade-Performance-Plant - an online control system.

The objective of this paper is to evaluate the applicability of the Cella technology for nutrient removal at the Svinninge WWTP  based on the experiences from the installation, startup and initial operation of the new plant. N2O emissions will be evaluated using dissolved N2O concentrations. The performance targets TN<4-6mg/L.

Time

11:50 AM - 12:15 PM

Location Name

Room 2

Track

11:50 - 14:55 Process Intensification