Published in Scientific Papers. Series "Management, Economic Engineering in Agriculture and rural development", Vol. 16 ISSUE 4
Written by Cecilia NEAGU
The wastewater, insufficiently treated, affect negatively the quality of emissary reached. Poorly treated urban wastewater discharge to surface water has serious consequences for the natural phenomenon of self-cleaning the waters of the Danube and Borcea branch is currently at the limit of the natural opportunities to restore natural biogeochemical balance. In the present study it was discussed about the wastewater with major contribution in pollutants that reach the terminal basin of the Danube, derived from the Wastewater Treatment Plant in Calarasi municipality. The quality indicators of wastewater monitored in the study were: chemical oxygen consume, biochemical oxygen consume, total nitrogen, total phosphorus. The best results were seen in the treatment in case of biochemical oxygen consume (over 96%). Among the main problems recorded in the Wastewater Treatment Plant, it is remarked lower efficiency in removing phosphorus and total nitrogen in the cold season, due to malfunctioning of biological stage, meaning a weak process of eutrophication in the emissary, Borcea Branch.
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