Item


Evaluation of process conditions triggering emissions of green-house gases from a biological wastewater treatment system

In this study, methane (CH4) and nitrous oxide (N2O) emission dynamics of a plug–flow bioreactor located in a municipal full-scale wastewater treatment plant were monitored during a period of 10 weeks. In general, CH4 and N2O gas emissions from the bioreactor accounted for 0.016% of the influent chemical oxygen demand (COD) and 0.116% of the influent total Kjeldahl nitrogen (TKN) respectively. In order to identify the emission patterns in the different zones, the bioreactor was divided in six different sampling sites and the gas collection hood was placed for a period of 2–3 days in each of these sites. This sampling strategy also allowed the identification of different process perturbations leading to CH4 or N2O peak emissions. CH4 emissions mainly occurred in the first aerated site, and were mostly related with the influent and reject wastewater flows entering the bioreactor. On the other hand, N2O emissions were given along all the aerated parts of the bioreactor and were strongly dependant on the occurrence of process disturbances such as periods of no aeration or nitrification instability. Dissolved CH4 and N2O concentrations were monitored in the bioreactor and in other parts of the plant, as a contribution for the better understanding of the transport of these greenhouse gases across the different stages of the treatment system

This study was funded by the Spanish Government Ministerio de Economía y Competitividad (project CTM 2011-27163) and the European Commission FP7-PEOPLE-2011-CIG 303946 project. M. Pijuan acknowledges the Ramon y Cajal research fellowship (RYC-2009-04959) provided by the Spanish Government

Elsevier

Manager: Ministerio de Economía y Competitividad (Espanya)
Ministerio de Ciencia e Innovación (Espanya)
Author: Rodríguez-Caballero, Adrián
Aymerich Blazquez, Ignasi
Poch, Manuel
Pijuan i Vilalta, Maite
Date: 2014 September 15
Abstract: In this study, methane (CH4) and nitrous oxide (N2O) emission dynamics of a plug–flow bioreactor located in a municipal full-scale wastewater treatment plant were monitored during a period of 10 weeks. In general, CH4 and N2O gas emissions from the bioreactor accounted for 0.016% of the influent chemical oxygen demand (COD) and 0.116% of the influent total Kjeldahl nitrogen (TKN) respectively. In order to identify the emission patterns in the different zones, the bioreactor was divided in six different sampling sites and the gas collection hood was placed for a period of 2–3 days in each of these sites. This sampling strategy also allowed the identification of different process perturbations leading to CH4 or N2O peak emissions. CH4 emissions mainly occurred in the first aerated site, and were mostly related with the influent and reject wastewater flows entering the bioreactor. On the other hand, N2O emissions were given along all the aerated parts of the bioreactor and were strongly dependant on the occurrence of process disturbances such as periods of no aeration or nitrification instability. Dissolved CH4 and N2O concentrations were monitored in the bioreactor and in other parts of the plant, as a contribution for the better understanding of the transport of these greenhouse gases across the different stages of the treatment system
This study was funded by the Spanish Government Ministerio de Economía y Competitividad (project CTM 2011-27163) and the European Commission FP7-PEOPLE-2011-CIG 303946 project. M. Pijuan acknowledges the Ramon y Cajal research fellowship (RYC-2009-04959) provided by the Spanish Government
Format: application/pdf
Document access: http://hdl.handle.net/10256/12616
Language: eng
Publisher: Elsevier
Collection: info:eu-repo/semantics/altIdentifier/doi/10.1016/j.scitotenv.2014.06.015
info:eu-repo/semantics/altIdentifier/issn/0048-9697
info:eu-repo/grantAgreement/MICINN//CTM2011-27163/ES/GASES DE EFECTO INVERNADERO EN LOS SISTEMAS DE TRANSPORTE Y TRATAMIENTO DE AGUAS RESIDUALES: EVALUACION DE LAS EMISIONES/
info:eu-repo/grantAgreement/MICINN//RYC-2009-04959/ES/RYC-2009-04959/
info:eu-repo/grantAgreement/EC/FP7/303946/EU/Exploring novel nitrifier pathways to minimise direct greenhouse gas emissions from WWTPs./NITRI-GHG
Rights: Tots els drets reservats
Subject: Aigües residuals -- Depuració -- Tractament biològic
Sewage -- Purification -- Biological treatment
Gasos d’efecte hivernacle -- Aspectes ambientals
Greenhouse gases -- Environmental aspects
Title: Evaluation of process conditions triggering emissions of green-house gases from a biological wastewater treatment system
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors