Removal of geosmin and 2-methylisoborneol during managed aquifer recharge: Batch and column studies
KAUST DepartmentWater Desalination and Reuse Research Center (WDRC)
Biological and Environmental Sciences and Engineering (BESE) Division
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AbstractManaged aquifer recharge is a robust barrier in the multi-barrier approach to supply safe drinking water. The removal performance of gesomin and 2-methylisoborneol through managed aquifer recharge was investigated using batch and column experiments. Batch experiments were carried out to investigate the removal of geosmin and 2-methylisoborneol (MIB) in the presence of different types of biodegradable organic matter using different types of water. Five different types of water spiked with 70-293 ng/L of geosmin and MIB were used in batch reactors, and complete removal of geosmin and MIB (down to the detection limit) was achieved in all cases. Soil column studies showed that biodegradation contributed to the removal of geosmin and MIB by 23 and 31%, respectively (empty bed contact time: 17 hours). The removal of geosmin and MIB appeared to be influenced more by microbial activity than the initial concentrations of geosmin and MIB. Adsorption was found to be the dominant mechanism (major role) followed by biodegradation (minor role) for geosmin and MIB removals during soil passage. Managed aquifer charge can therefore be used as a robust barrier to remove taste and odor (T&O) causing compounds.© IWA Publishing 2012.
SponsorsThis study was supported by the Korea Ministry of Environment as a part of 'The Eco-Innovation project (Global Top project) GT-SWS-11-01-006-0'. Special thanks to Kristin Kutschera from Institut fur Wasserchemie, TU Dresden (Germany), for her support on geosmin and MIB measurements. Furthermore, we would like to acknowledge the help of Dr Magic-Knezev and Ineke van der Veer-Agterberg (HetWaterlaboratorium, The Netherlands) for their support on ATP measurements.