The research of biological phosphorus and nitrogen removal from the waste water using new wastewater treatment technology

Abstract

Nitrogen and phosphorus removal is necessary to avoid eutrophication of water bodies. "BioBalance" technology as the newest way for nitrogen and phosphorus removal has been applied at Utena Waste Water Treatment Plant in Lithuania "BioBalance Symbio" technology for nitrogen removal is based on the active sludge technology with simultaneous denitrification. The anaerobic zone is equipped before the nitrification/denitrification tank for the removal of biological phosphorus. "BioBalance" measuring equipment, a NADH fluorescensor is based on the process mentioned above. The technology has been evaluated and compared with technology before reconstruction during this scientific work. Influence of wastewater in the effluent has been evaluated on Vyžuona rivulet before and after reconstruction of Utena Waste Water Treatment Plant. The investigation for the BOD7/P-total after mechanical treatment and the total phosphorus concentration in the effluent shows that the effect of removal of phosphorus was high when the BOD7/total phosphorus after mechanical treatment was higher than 15.