DUGi

Coupling anammox and advanced oxidation-based technologies for mature landfill leachate treatment

http://dugi.udg.edu/item/http:@@@@hdl.handle.net@@2072@@296524

The aim of this study was to evaluate the suitability to couple anammox process with advanced oxidation processes (AOPs) to treat mature landfill leachate with high nitrogen and non-biodegradable organic matter concentrations (2309±96mgN-TNL-1 and 6200±566mgCODL-1). The combination of a partial nitiration-anammox system coupled with two AOP-based technologies (coagulation/flocculation+ozonation and photo-Fenton) was assessed in terms of nitrogen and carbon removal. Total nitrogen removal efficiency within a range of 87-89% was obtained with both configurations without the need of any external carbon source. The COD removal efficiencies attained were 91% with coagulation/flocculation+ozonation and 98% with photo-Fenton. Applying the biological treatment prior to advanced oxidation processes-based technologies reduced the quantity of needed reagents giving attaining higher removal efficiencies. From a basic economical point of view and taking into account the results of this study, the combination of partial nitritation-anammox system with photo-Fenton treatment was more favorable than with coagulation/flocculation+ozonation treatment. © 2013 Elsevier B.V.

This work was founded by the Spanish Government (CONSOLIDER CSD2007-00055, ITACA, SIRENA CTQ2011-24114 and N-OPTIMMOX IPT-2011-1073-310000). J. Gabarro would like to thank the University of Girona for his predoctoral fellowship (BR 2011). Dr. Gonzalez-Olmos wishes to thank the Ministerio de Ciencia e Innovacion (Spain) for the Juan de la Cierva fellowship (JCI-2010-07104)

Elsevier