Abstract:
In this paper, the authors, based on extensive research literature, highlight some aspects of advanced biological
treatment processes by providing advanced technological efficiency in order to address surface water pollution. Natural
sources of pollution of surface water, are mostly of their permanent sources. The quality of surface water to discharge
effluent from wastewater treatment is influenced by poorly treated sewage, because they contain pollutants. Are the
most dangerous pollutants are organic because they under certain conditions and concentrations of the fermentation.
The composition of wastewater, the organic fraction is made up of carbon and nitrogen fraction. Effluents after the
biological stage is classical in its composition different forms of nitrogen (ammonium salts, nitrites, nitrates, organic
nitrogen) and phosphorus (phosphorus organic orthophosphates, polyphosphates) that reached the receiver are easily
assimilated by the algae, contributing directly increase the rate of eutrophication of standing or slow flow. Research
conducted in recent years by specialists in our country show a significant increase in these nutrients in surface water and
groundwater. Tertiary or advanced stage of wastewater treatment is aimed at the elimination of wastewater nitrogen
compounds, phosphorus and other chemicals remaining in water after using the biological processes of nitrification -
denitrification. The purpose of this paper is to highlight the presence of pollutants in wastewater discharge into the
emissary of insufficiently treated by conventional methods, the harmful effects of these pollutants on the environment
and presentation of advanced treatment methods to resolve the problem.
