Title: A laboratory-scale mixed multibarrier for removal of ammonium from landfill leachate contamination

 

Author: Thomas Van Nooten, Ludo Diels, Leen Bastiaens

 

Addresses:
Department of Separation and Conversion Technologies, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium.
Department of Separation and Conversion Technologies, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium.
Department of Separation and Conversion Technologies, Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium

 

Journal: Int. J. of Environmental Engineering, 2011 Vol.3, No.3/4, pp.240 - 252

 

Abstract: A column-scale multibarrier, combining nitrification and ion exchange processes in a mixed configuration, was evaluated for the removal of ammonium (325 ± 60 mg N L−1) from landfill leachate contamination. Inoculating granular clinoptilolite with nitrifying bacteria resulted in a 3.2 times higher overall ammonium removal, compared with a non-inoculated control. Interestingly, nitrifying activity resulted in desorption of ammonium from saturated clinoptilolite and subsequent microbial oxidation of the released ammonium. These findings indicate that ammonium-saturated clinoptilolite can be in-situ bioregenerated in a multibarrier, which implicates that periodic (and particularly costly) removal and external regeneration of the ion exchange material can be avoided.

 

Keywords: multibarriers; PRB; permeable reactive barriers; landfill leachate; ammonium removal; bioregeneration; clinoptilolite; nitrification; leachate treatment; ion exchange.

 

DOI: 10.1504/IJEE.2011.041351

10.1504/11.41351

 

 

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