The Annals of “Dunarea de Jos” University of Galati. Fascicle IX, Metallurgy and Materials Science (Jun 2018)
Studies and Research on Water Pollution in Galati Urban Area
Abstract
The purpose of the work was the study of wastewater treatment at the Galati sewage Station in June, August 2017 and January, February, April and May 2018. The treatability can be expressed by removing the total organic substances from water (determined by CCO or cot tests) or by removing equivalent substances (determined by the CBO test). The reduction of CCOCr and CBO5 from wastewater after passing through the installation of the Galati treatment station is an estimate of the quantity of organic substances removed in the treatment process. As a result of the determination of the concentration of organic substances in the influence and effluent of the Galati treatment station, the following were found: The Symons environmental treatment ratio achieved for influence was 0.554 which framed the influence in S.E. Galati in the category of wastewater readily treatable by biological methods, in the presence of naturally occurring micro-organisms in these waters. Another criterion for assessing the treatability of wastewater is the efficiency of reducing CCOCr and CBO5. The efficiency of reduction of CCOCr (81%) and CBO5 (84%) allow for the characterization of wastewater as a biological treat in S.E. Galati and alongside the operation at optimum parameters of treatment plants.
