Home Le ragioni per misurare le emissioni di N2O
Why measure nitrous oxide_1680x600

Le ragioni per misurare le emissioni di N2O

Il protossido di azoto (N2O) viene prodotto durante il trattamento delle acque reflue e rilasciato nell'atmosfera attraverso lo stripping per aerazione. L'N2O si forma quando le condizioni di processo per la conversione dell'azoto non sono ideali.

Con un potenziale di riscaldamento globale 273 volte superiore a quello della CO2, gli studi rivelano che l'N2O può rappresentare fino al 90% dell'impronta di carbonio di un impianto di acque reflue. La stima basata esclusivamente sui fattori di emissione non tiene conto delle variazioni stagionali e specifiche del sito, portando a una rendicontazione di sostenibilità incerta.

La misurazione dell'N2O in tempo reale consente agli operatori di valutare con precisione le emissioni dirette e di ottimizzare i processi per ridurre l'impatto ambientale.

Sign up for webinar_700x400
Come funziona il sistema per l’N2O nelle acque reflue

Il sistema per l’N2O nelle acque reflue comprende un controller e 1-2 sensori con cavi di lunghezza compresa tra 5 e 100 metri.

Il sensore misura il protossido di azoto (N2O) disciolto in tempo reale nelle acque reflue, fornendo dati online continui per individuare tendenze e correlazioni con altri parametri. Consente strategie avanzate di controllo del processo.

L'installazione è semplice e la manutenzione minima: basta calibrare il sensore ogni due mesi e sostituire la testa del sensore due volte all'anno.

I dati vengono memorizzati sul controller e possono essere trasmessi al sistema di controllo dell'impianto di trattamento per il calcolo delle emissioni.

N2O Wastewater System_1400x800
All
Tech Notes
References
N2O Sensor
Tech Notes References
N2O sensor matches 91% of measured off-gas emissions

Case Study: Full-scale comparison of N2O emissions determined by liquid sensors and off-gas measurement

Biofos_Avedøre_013_700x400
Tech Notes References
Direct Effect of Activated Sludge Concentration on N2O Emission and CO2-equivalents at Full-scale

Significant 3-fold increase in IPCC2019 wastewater N2O emission factor supported by Danish studies.

Figur 1_featured_700x400
Tech Notes References
Positioning of the N2O Wastewater Sensor

A case study from Kralingseveer WWTP in the Netherlands explores the influence of sensor placement.

N2O mechanisms
Tech Notes
National N2O Mapping and Reduction of N2O Emission through Advanced Online Control

Based on data from Danish WWTPs through advanced online-control.

Figure 1: Activated Sludge Tank
Tech Notes References
N2O Monitoring Highlights Potential for GHG Emissions Reduction

Learn about the results from N2O monitoring in the activated sludge tanks at Severn Trent’s Spernal sewage treatment plant

Denitrification
Tech Notes
A Tool for Carbon Dosage Control

Monitor the N2O concentration in the liquid and use N2O as a control parameter for carbon dosage in the denitrification process.

N2O Sensor Controls Emissions from Deammonification Processes
Tech Notes References
N2O Sensor Controls Emissions from Deammonification Processes

Learn how the water utility Aquafin controls emissions from deammonification processes using the the N2O Wastewater Sensor

Nitrous Oxide Measurement
Tech Notes
Nitrous Oxide Measurement as Key Step towards Climate-Neutral Wastewater Treatment

Greenhouse gas emissions at wastewater treatment plants are coming into focus as the water industry works to reduce its climate footprint

WWTP-Flensburg_credit-photo-Andreas Große
References
Identifying N2O at the Flensburg wastewater treatment plant

The investment costs had initially deterred us somewhat. However ...

Characterizing-N2O-emissions-from-WWTPs_fig3_700x400
Tech Notes
Characterizing N2O emissions from WWTPs

A study of three very different WWTPs in Denmark: Bjergmarken (125,000 PE), Holbæk (60,000 PE), and Hvalsø (11,570 PE)

Controller-Biofos_1400x800
Tech Notes
N2O Emissions from Danish WWTPs – a two year monitoring project

The available data show that the nitrous oxide emission varies in time and between wastewater treatment plants.

Trickling Filters Fig. 1
Tech Notes
Nitrous Oxide Emissions from Trickling Filters

Information regarding N2O emissions from trickling filters is limited, partly caused by the difficulties in capturing off-gases.

IPCC-2019-report
Tech Notes
IPCC Greenhouse Gas Emission Factors

Significant 3-fold increase in IPCC2019 wastewater N2O emission factor supported by Danish studies.

N2O Monitoring at Vandcenter Syd bassiner_700x400
References
N2O Monitoring Puts VCS Denmark at the Technological Forefront

VCS Denmark, one of the largest and oldest water and wastewater companies in Denmark, is actively committed to resource optimization

Frederikshavn-Case-Curves_700x400
References
Frederikshavn Water Utility

Frederikshavn Water Utility contacted Unisense Environment for assistance in determining the actual N2O derived CO2 footprint