Item


Fate of NDMA precursors through an MBR-NF pilot plant for urban wastewater reclamation and the effect of changing aeration conditions

The removal of N-nitrosodimethylamine (NDMA) formation potential through a membrane bioreactor (MBR) coupled to a nanofiltration (NF) pilot plant that treats urban wastewater is investigated. The results are compared to the fate of the individual NDMA precursors detected: azithromycin, citalopram, erythromycin, clarithromycin, ranitidine, venlafaxine and its metabolite o-desmethylvenlafaxine. Specifically, the effect of dissolved oxygen in the aerobic chamber of the MBR pilot plant on the removal of NDMA formation potential (FP) and individual precursors is studied. During normal aerobic operation, implying a fully nitrifying system, the MBR was able to reduce NDMA precursors above 94%, however this removal percentage was reduced to values as low as 72% when changing the conditions to minimize nitrification. Removal decreased also for azithromycin (68–59%), citalopram (31–17%), venlafaxine (35–15%) and erythromycin (61–16%) on average during nitrifying versus non-nitrifying conditions. The removal of clarithromycin, o-desmethylvenlafaxine and ranitidine could not be correlated with the nitrification inhibition, as it varied greatly during the experiment time. The MBR pilot plant is coupled to a nanofiltration (NF) system and the results on the rejection of both, NDMA FP and individual precursors, through this system was above 90%. Finally, results obtained for the MBR pilot plant are compared to the percentage of removal by a conventional full scale biological wastewater treatment plant (WWTP) fed with the same influent. During aerobic operation, the removal of NDMA FP by the MBR pilot plant was similar to the full scale WWTP

This study was funded by the Spanish MINECO funded project WaterFate (CTM2012-38314-C02-01). Dr. Maria Jos e Farr e acknowledges the European Commission for funding project 623711 under the FP7-PEOPLE-2013-IIF - Marie Curie Action: “International Incoming Fellowships”. Mr Julian Mamo acknowledges the funding received from the People Program (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/ 2007e2013, under REA agreement 289193 (SANITAS project)

© Water Research, 2016, vol. 102, p. 383-393

Elsevier

Author: Mamo, Julian
Insa Aguilar, Sara
Monclús Sales, Hèctor
Rodríguez-Roda Layret, Ignasi
Comas Matas, Joaquim
Barceló i Cullerés, Damià
Farré, Maria José
Date: 2016 October 1
Abstract: The removal of N-nitrosodimethylamine (NDMA) formation potential through a membrane bioreactor (MBR) coupled to a nanofiltration (NF) pilot plant that treats urban wastewater is investigated. The results are compared to the fate of the individual NDMA precursors detected: azithromycin, citalopram, erythromycin, clarithromycin, ranitidine, venlafaxine and its metabolite o-desmethylvenlafaxine. Specifically, the effect of dissolved oxygen in the aerobic chamber of the MBR pilot plant on the removal of NDMA formation potential (FP) and individual precursors is studied. During normal aerobic operation, implying a fully nitrifying system, the MBR was able to reduce NDMA precursors above 94%, however this removal percentage was reduced to values as low as 72% when changing the conditions to minimize nitrification. Removal decreased also for azithromycin (68–59%), citalopram (31–17%), venlafaxine (35–15%) and erythromycin (61–16%) on average during nitrifying versus non-nitrifying conditions. The removal of clarithromycin, o-desmethylvenlafaxine and ranitidine could not be correlated with the nitrification inhibition, as it varied greatly during the experiment time. The MBR pilot plant is coupled to a nanofiltration (NF) system and the results on the rejection of both, NDMA FP and individual precursors, through this system was above 90%. Finally, results obtained for the MBR pilot plant are compared to the percentage of removal by a conventional full scale biological wastewater treatment plant (WWTP) fed with the same influent. During aerobic operation, the removal of NDMA FP by the MBR pilot plant was similar to the full scale WWTP
This study was funded by the Spanish MINECO funded project WaterFate (CTM2012-38314-C02-01). Dr. Maria Jos e Farr e acknowledges the European Commission for funding project 623711 under the FP7-PEOPLE-2013-IIF - Marie Curie Action: “International Incoming Fellowships”. Mr Julian Mamo acknowledges the funding received from the People Program (Marie Curie Actions) of the European Union’s Seventh Framework Programme FP7/ 2007e2013, under REA agreement 289193 (SANITAS project)
Format: application/pdf
ISSN: 0043-1354 (versió paper)
1879-2448 (versió electrònica)
Document access: http://hdl.handle.net/10256/12610
Language: eng
Publisher: Elsevier
Collection: MINECO/PN 2012-2015/CTM2012-38314-C0201
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.watres.2016.06.057
Articles publicats (D-EQATA)
info:eu-repo/grantAgreement/EC/FP7/623711
info:eu-repo/grantAgreement/EC/FP7/289193
Is part of: © Water Research, 2016, vol. 102, p. 383-393
Rights: Tots els drets reservats
Subject: Bioreactors
Reactors de membrana
Membrane reactors
Aigües residuals -- Depuració -- Tractament biològic
Sewage -- Purification -- Biological treatment
Membranes (Tecnologia)
Membranes (Technology)
Title: Fate of NDMA precursors through an MBR-NF pilot plant for urban wastewater reclamation and the effect of changing aeration conditions
Type: info:eu-repo/semantics/article
Repository: DUGiDocs

Subjects

Authors