THE EFFECT OF INCREASED WATER SALINITY OF THE REMOVAL OF MICROPOLLUTANTS BY BIOLOGICAL CARBON FILTERS

The aim of this research was to find how the biological activated carb on (BAC) filters operate in conditions of raised salinity and rapid ch anges in organic pollutants concentration. The experiments were realiz ed in bench scale and were continued for 18 months. The efficiency of BAC was determined as organics removal by measuring the absorbance in UV, COD and TOC. The result of the research proved that salinity up to 1000 mgCl./L has not disturbed the microorganisms growth. There was n o influence of salinity on. COD and TOC removal. The absorbance measur ed by UV in higher salinity showed about 10% lower effect of BAC. To g ain the high effect of SAS and phenol removal on BAC in water of high salinity the increased contact time was necessary. The very stable eff ect of biodegradation on BAC was observed in conditions of rapid incre ase of micropollutants concentration, regardless of water salinity.