Karin Hellauer

Event Date: 
Tuesday, October 31, 2017 - 18:00 - 18:15
Institution: 
Technical University of Munich (TUM)
Title: 

Biotransformation of trace organic chemicals in natural treatment systems

Abstract: 

Biotransformation is known as the most relevant removal mechanism for trace organic chemicals (TOrCs) in natural treatment systems (Alidina et al., 2014) which have a great potential to efficiently remove microbial contaminants, organic matter and several TOrCs (Tufenkji et al., 2002). Based on recent studies pointing out an enhanced transformation of TOrCs under oxic and carbon-limited conditions (e.g. Regnery et al., 2015), the sequential managed aquifer recharge technology (SMART) was established (Regnery et al., 2016). The combination of two infiltration steps with an intermediate re-aeration results in favorable oxic and carbon-limited conditions in the second infiltration step (Regnery et al., 2016). In addition to the Prairie Waters Project in Aurora (Colorado, USA) (Regnery et al., 2016), the SMART concept was successfully demonstrated in laboratory-scale and field-scale experiments in Berlin, Germany (Hellauer et al., 2017a; Hellauer et al., 2017b). Recent studies revealed an overrepresentation of genes which are involved in the xenobiotic degradation and therefore an enhanced TOrCs removal such as cytochrome P450 in sediments under carbon starving conditions (Li et al., 2014). Based on the approach of Lauro et al. (2009) identifying genomic markers for copio- and oligotrophic organisms in the marine environment, specific genomic features which are characteristic for microbial communities under prevailing carbon-limited conditions in soil should be elucidated. 
References 
Alidina, M., Li, D., Drewes, J.E., 2014. Investigating the role for adaptation of the microbial community to transform trace organic chemicals during managed aquifer recharge. Water Res. 56, 172–180. Hellauer, K., Karakurt, S., Sperlich, A., Burke, V., Massmann, G., Hübner, U., Drewes, J.E., 2017a. Establishing Sequential Managed Aquifer Recharge Technology (SMART) for Enhanced Removal of Trace Organic Chemicals: Experiences from field studies in Berlin, Germany. submitted. J. Hydrol. 
Hellauer, K., Mergel, D., Ruhl, A., Filter, J., Hübner, U., Jekel, M., Drewes, J.E., 2017b. Advancing Sequential Managed Aquifer Recharge Technology (SMART) Using Different Intermediate Oxidation Processes. Water 9 (3), 221. 
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Li, D., Alidina, M., Drewes, J.E., 2014. Role of primary substrate composition on microbial community structure and function and trace organic chemical attenuation in managed aquifer recharge systems. Appl. Microbiol. Biotechnol. 98 (12), 5747–5756. 
Regnery, J., Wing, A.D., Alidina, M., Drewes, J.E., 2015. Biotransformation of trace organic chemicals during groundwater recharge: How useful are first-order rate constants? J. Contam. Hydrol. 179, 65–75. 
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