COMPARISON OF PERFORMANCES OF BIOLOGICAL NUTRIENT REMOVAL SYSTEMS FOR MUNICIPAL WASTEWATER TREATMENT

Authors : Selami DEMİR

Pages : 1235-1248

View : 26 | Download : 7

Publication Date : 2021-10-05

Article Type : Research Paper

Abstract :Performance of wastewater treatment processes depends on many factors including wastewater characteristics, environmental conditions and operating parameters. Several treatment processes have their own advantages and disadvantages in terms of treatment performance. Performances of anaerobic/anoxic/oxic insert ignore into journalissuearticles values(A²O);, five-stage Bardenpho insert ignore into journalissuearticles values(fsB);, University of Cape Town insert ignore into journalissuearticles values(UCT);, and modified UCT processes for biological nutrient removal from municipal wastewaters were evaluated at various C:N:P ratios in primary effluent by keeping all other parameters identical to each other in each process. The comparison was based on steady-state removal efficiencies for chemical oxygen demand insert ignore into journalissuearticles values(COD);, total Kjeldahl Nitrogen insert ignore into journalissuearticles values(TKN);, total nitrogen insert ignore into journalissuearticles values(TN);, and total phosphorous insert ignore into journalissuearticles values(TP);. Simulations were performed using an MS Excel Visual Basic for Applications insert ignore into journalissuearticles values(VBA); tool based on Activated Sludge Model No.3 extended with biological phosphorous removal processes. Simulation results indicated that, for low-to-mid influent TKN/COD ratios, fsB process shows the best performance in terms of TN and TP removal. On the other hand, modified UCT process can be the best selection at high influent TKN/COD ratios if only phosphorous removal is of concern. Five-stage Bardenpho process must be selected for both nitrogen and phosphorous removal no matter the influent C:N:P ratio is.
Keywords : Enhanced municipal wastewater treatment, biological nutrient removal, nitrogen removal, phosphorous removal, process configurations, activated sludge modeling

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