Name

Identifying mitigation measures for nitrous oxide emissions in biological wastewater treatment: A case study

Speakers

Ioanna Gkoutzamani

Authors

Ioanna Gkoutzamani, Evides Industriewater, Netherlands 
Giacomo Bellandi, AM team, Italy

Description

Evides Industriewater, a Dutch water company, in an effort to reduce greenhouse gas (GHG) emissions from its industrial wastewater treatment plants (WWTPs) started a nitrous oxide (N 2 O) emissions focused research project. In this poster the findings of the long term N 2 O monitoring campaign in a conventional biological wastewater treatment plant are presented. The main formation mechanisms were identified and verified by combining data processing, multivariant statistical analyses and Computational Fluid Dynamics (CFD)-informed dynamic modelling. Carbon limitation during denitrification was found to be the dominant formation driver, contributing over 90% of the N2O emissions. Mitigation strategies were tested virtually with the CFD-informed dynamic model, which indicated that adjustments of the (existing) external COD dosing, aiming at a target COD/ N ratio, can lead to a reduction of emissions by 80%, while using 10% lower carbon source.

Time

-

Location Name

Ludlow Concourse

Track

Posters