There are currently two N2O measurement systems in operation at the Ellinge WWTP

VA SYD has recently procured Upwater’s system for nitrous oxide measurements, but the German company Variolytics has also had two probes in operation at the Ellinge WWTP since the end of January.

Variolytics measurement equipment, the EmiCo Lite product, includes only two hoods per meter. Consequently, they found it difficult to win a tender at the Ellinge WWTP where we were seeking a system with nine hoods. Upwater’s system, Notos Mini, can include 14 hoods, and the measurement takes just one minute per hood.

Variolytics has been testing its equipment at the Ellinge WWTP since the end of January and will be dismantling it next week. The two hoods have been positioned in the first two aerated zones of one of the activated sludge lines. Nitrous oxide emissions have been almost non-existent throughout, which is good news for us at VA SYD. But we’ll have to see what the emissions look like when we measure across all zones.

Upwater is installing its equipment this week, so both suppliers’ equipment has been on site this week. On Monday, we also hosted a study visit during Vattenstämman, the conference held in conjunction with the annual meeting of the organisation Svenskt Vatten, the Swedish Water and Wastewater Association, where staff from both Upwater and Variolytics were on site to demonstrate their equipment.

Belongs to project

Reduce the emissions of nitrous oxide from wastewater treatment