dc.contributor |
Ministerio de Economía y Competitividad (Espanya) |
dc.contributor.author |
Marques, Ricardo |
dc.contributor.author |
Rodríguez-Caballero, Adrián |
dc.contributor.author |
Oehmen, Adrian |
dc.contributor.author |
Pijuan i Vilalta, Maite |
dc.date |
2017-09-04T10:18:22Z |
dc.date |
2016-08-01 |
dc.date |
info:eu-repo/date/embargoEnd/2018-08-01 |
dc.identifier.citation |
0043-1354 (versió paper) |
dc.identifier.citation |
1879-2448 (versió electrònica) |
dc.identifier.uri |
http://hdl.handle.net/10256/14353 |
dc.format |
application/pdf |
dc.language.iso |
eng |
dc.publisher |
Elsevier |
dc.relation |
https://doi.org/10.1016/j.watres.2016.04.052 |
dc.relation |
MINECO/PN 2011-2014/CTM2011-27163 |
dc.relation |
MINECO/PE 2016-2019/CTM 2015-66892-R |
dc.relation |
Versió postprint del document publicat a: https://doi.org/10.1016/j.watres.2016.04.052 |
dc.relation |
© Water Research, 2016, vol. 99, p. 171-179 |
dc.relation |
Articles publicats (ICRA) |
dc.relation |
info:eu-repo/grantAgreement/EC/FP7/303946 |
dc.rights |
Tots els drets reservats |
dc.rights |
info:eu-repo/semantics/embargoedAccess |
dc.subject |
Aigües residuals -- Depuració |
dc.subject |
Sewage -- Purification |
dc.subject |
Gasos d'efecte hivernacle |
dc.subject |
Greenhouse gases |
dc.subject |
Aigües residuals -- Plantes de tractament |
dc.subject |
Sewage disposal plants |
dc.title |
Assessment of online monitoring strategies for measuring N2O emissions from full-scale wastewater treatment systems |
dc.type |
info:eu-repo/semantics/article |
dc.type |
info:eu-repo/semantics/acceptedVersion |
dc.description.abstract |
Clark-Type nitrous oxide (N 2 O) sensors are routinely used to measure dissolved N 2 O concentrations in wastewater treatment plants (WWTPs), but have never before been applied to assess gas-phase N 2 O emissions in full-scale WWTPs. In this study, a full-scale N 2 O gas sensor was tested and validated for online gas measurements, and assessed with respect to its linearity, temperature dependence, signal saturation and drift prior to full-scale application. The sensor was linear at the concentrations tested (0-422.3, 0-50 and 0-10 ppmv N 2 O) and had a linear response up to 2750 ppmv N 2 O. An exponential correlation between temperature and sensor signal was described and predicted using a double exponential equation while the drift did not have a significant influence on the signal. The N 2 O gas sensor was used for online N 2 O monitoring in a full-scale sequencing batch reactor (SBR) treating domestic wastewater and results were compared with those obtained by a commercial online gas analyser. Emissions were successfully described by the sensor, being even more accurate than the values given by the commercial analyser at N 2 O concentrations above 500 ppmv. Data from this gas N 2 O sensor was also used to validate two models to predict N 2 O emissions from dissolved N 2 O measurements, one based on oxygen transfer rate and the other based on superficial velocity of the gas bubble. Using the first model, predictions for N 2 O emissions agreed by 98.7% with the measured by the gas sensor, while 87.0% similarity was obtained with the second model. This is the first study showing a reliable estimation of gas emissions based on dissolved N 2 O online data in a full-scale wastewater treatment facility |
dc.description.abstract |
This study was funded by the Spanish Government (MINECO) (CTM 2011-27163 and CTM2015-66892-R), European Commission (FP7-PEOPLE-2011-CIG 303946) and the Portuguese Fundação para a Ciência e Tecnologia (PTDC/AAC-AMB/12058/2010, UID/Multi/04378/2013, PhD grant SFRH/BD/74515/2010). Spanish and Portuguese Governments are also acknowledged for Acciones Integradas (PRI-AIBPT-2011-1232) and Luso-Espanhola action E-61/12. M. The European Commission is also acknowledged through COST action ES1202 (Water 2020). M. Pijuan acknowledges the Ramon y Cajal Research fellowship (RYC-2009-04959) from the Spanish Government. We thank Dr. Mikkel Holmen Andersen (Unisense Environment, Denmark) for providing the sensors and helpful comments |