Formation of THMs during typical dissolved organic nitrogen alanine chlorination in drinking water© Aristotle University of Thessaloniki (6/2009)
Owing to its low cost, chlorine is globally the most used chemical oxidant for drinking water disinfection. However, there is an unintended consequence of disinfection, the generation of chemical disinfection byproducts (DBPs), especially trihalomethanes (THMs). Dissolved organic nitrogen (DON) as the important precursor of DBPs is of current concern. As alanine (Ala) occurs in much source water, we studied formation pathways for THMs during chlorination of model alanine.
Potable water denitrification© Aristotle University of Thessaloniki (6/2009)
The aim of this study was to investigate the performance of bench-scale packed-bed reactors for hydrogenotrophic denitrification, with hydrogen production from electrolysis of water with electric energy provided from a solar cell. The effect of hydrogen and carbon dioxide on the performance of two packed-bed bioreactors with support media gravel of different sizes, under continuous operation was examined. Also, a mathematical model which describes denitrification under continuous operation was developed.
Biological potable water treatment© Aristotle University of Thessaloniki (6/2009)
A full-scale trickling filter for simultaneous hydrogen sulfide, ammonium, iron and manganese removal was designed, constructed and operated successfully in New Vouprasio village, in western Greece. The aim of this work was to design a very effective and especially cheap installation to provide high quality potable water to habitants at minimal cost. The long term simultaneous removal of the four pollutants was studied as well as the effect of environmental conditions on system performance.
The variation of the seawater/freshwater interface at the coastal aquifer in Yongho bay, Busan© Aristotle University of Thessaloniki (6/2009)
This study site is the coastal aquifer in Yongho bay, Busan and is intruded by seawater. Aquifer media are formed reclaimed sedimentary layer, weathered soil layer, weathered breccia layer and bedrock. The bedrock consists of tuffaceous sedimentary rock, andesite and andesitic volcanic breccia. A monitoring well is approximately 180 m away from the coastal line. The developed and casing depth of the monitoring well are 120 m and 19 m below ground surface, respectively.
Monitoring of drinking water quality in the region of Kozani, Greece© Aristotle University of Thessaloniki (6/2009)
Certain physicochemical (pH, conductivity, turbidity, NO2-, NO3-, NH4+, residual chlorine) as well as microbiological parameters of drinking water samples taken from 17 municipalities of Kozani Prefecture during a period of four years (2005-2008) were analysed in the Environmental Centre of Kozani Prefecture accredited laboratory.
Occurrence of pharmaceuticals of different therapeutic classes in surface waters© Aristotle University of Thessaloniki (6/2009)
Pharmaceutical compounds in the environment lately have been acknowledged to constitute a health risk for humans, terrestrial and aquatic ecosystems. Human and veterinary applications are the main sources of pharmaceuticals in the environment and the major pathways are excretion and discharge to the environment through sewage treatment plants (STP’s).