DBPapers
DOI: 10.5593/SGEM2016/B31/S12.101

THE USE OF THE MICROTOX SYSTEM TO ASSESS THE POTENTIAL RELEASE OF TOXIC SUBSTANCES FROM THE SORPTION MATERIALS USED IN DRINKIG WATER TREATMENT

I.Biedron, J. Chojniak, J. Sobolczyk, L. Jalowiecki
Wednesday 7 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-61-2 / ISSN 1314-2704, June 28 - July 6, 2016, Book3 Vol. 1, 773-780 pp

ABSTRACT
The presence of iron and manganese in water may cause taste, staining and accumulation problems, and their removal is an important step in the treatment of groundwater and using the groundwater as drinking water. The most common method of removing this elements from groundwater is oxidiziation and precipitation ferric and manganic oxides on filtration bed.
The biological processes that remove iron and manganese are based on various stages of biofiltration where different layers of bed are colonized by Fe and Mn oxidizing bacteria. Microorganisms from water attach to surfaces of the sorbents, and develop biofilms. The microorganisms otherwise oxidation of iron and manganese may also occur processes such as nitrification, denitrification. Biofiltration is the optimal method for the removal of iron and manganese in both biological and physico-chemical water treatment processes.
The biofilter can be built from natural as well as synthetic materials. The most commonly used is a sand bed. There are also used deposits such as crushed granite or marble, anthracite, diatomite, activated carbon. Filter beds must also meet some additional requirements; can not release to the water any toxic substances and should be rugged.
The aim of this study was to evaluate the potential release of toxic substances after 8 months of biofilters work. The raw sorption materials were applied as a control. The analysis were done by the Microtox system.

Keywords: sorption materials, biofilters, Microtox, ecotoxicity