Objective Treatment Aspects

Bank filtration (BF) is a natural water treatment process which induces surface water to flow in response to a hydraulic gradient through soil/sediment and into a vertical or horizontal well. It is a relatively cost-effective, robust and sustainable technology. From a historical perspective, BF is first mentioned in the bible, and the process has been recognized as a proven method for drinking water treatment in Europe for more than 100 years. However, the mechanisms of removal of different contaminants during BF are not fully understood. This study showed that BF is an effective multiple objective barrier for removal of different contaminants present in surface water sources including bulk organic matter and organic micropollutants (OMPs) like pharmaceutically active compounds and endocrine disrupting compounds. It was found that biodegradation and adsorption play primary and secondary roles, respectively, in the removal of OMPs during soil passage. Furthermore, using field data from BF sites and chemical properties of OMPs, models were developed to estimate the removal of OMPs during soil passage. It can be concluded that the removal efficiencies of BF for these contaminants can be maximised by proper design and operation of recovery wells taking into consideration source water quality characteristics and local hydrogeological conditions.

Sung Kyu Maeng was born in Seoul, South Korea on 5 January 1972. After finishing secondary school he started B.S. in Environmental Engineering at Rensselaer Polytechnic Institute (RPI), Troy, New York, USA and graduated in May, 1995. He started his career at Korea Institute of Science and Technology (KIST), Seoul, South Korea in 1999. In 2006, he joined Ph.D. research at UNESCO-IHE/Delft University of Technology on "Multiple objective treatment aspects of bank filtration". Currently, he is a senior researcher at KIST, Seoul, Korea.

Abstract, Acknowledgements; Table of Contents
1. Introduction;2. Occurence and Fate of Bulk Organic Matter and Pharmaceutically Active Compounds in Managed Aquifer Recharge; 3. Fate of Effluent Organic Matter During Bank Filtration;4. Fate of Endocrine Disrupting Compuounds during Bank Filtration;5. Role of Biodegradation in the Removal of Pharmaceutically Active Compounds Removal During Bank Filtration;6. Organic Micropollutant Removal from Wastewater Efflucent-Impacted Drinking Water Sources During Bank Filtration and Artificial Recharge;7. Framework for Assessment of Organic Micropollutants Removal during Mangaed Acquifer Recharge;8. Summary and Conclusions;