Impact of multiple wastewater feedings on the efficiency of nutrient removal in an IFAS-MBSBBR: number of feedings vs. efficiency of nutrient removal.
This article presents the results of research into the influence of one, two and three wastewater feedings in a cycle on efficiency and performance of combined biological nitrogen and phosphorus removal in an integrated fixed-film activated sludge and moving-bed sequencing batch biofilm reactor (IFAS-MBSBBR). The experiment lasted 158 days and was conducted in two laboratory models of the IFAS-MBSBBR with an active volume of 28 L. It was found that along with an increase in the number of wastewater feedings, an increase in nitrogen removal efficiency was observed (from 56.9 ± 2.30% for a single feeding to 91.4 ± 1.77% for three feedings). Moreover, the contribution of simultaneous nitrification/denitrification in nitrogen removal increased (from 2.58% for a single feeding to 69.5% for three feedings). Systems with a greater number of feedings stimulated the process of denitrifying phosphorus removal. Regardless of the way in which wastewater feeding was applied to the IFAS-MBSBBR, highly efficient chemical oxygen demand (COD) removal (94.8 ± 1.80%) and biological phosphorus removal (98.9 ± 0.87%) were achieved.
Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska Str. 20, Warsaw 00-653, Poland E-mail: jolanta.podedworna@is.pw.edu.pl.
J
J
Podedworna
Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska Str. 20, Warsaw 00-653, Poland E-mail: jolanta.podedworna@is.pw.edu.pl.
M
M
Zubrowska-Sudol
Faculty of Building Services, Hydro and Environmental Engineering, Warsaw University of Technology, Nowowiejska Str. 20, Warsaw 00-653, Poland E-mail: jolanta.podedworna@is.pw.edu.pl.
K
K
Sytek-Szmeichel
Faculty of Energy and Environmental Engineering, Environmental Biotechnology Department, Silesian University of Technology, Krzywoustego Str. 8, Gliwice 44-100, Poland.
A
A
Gnida
Faculty of Energy and Environmental Engineering, Environmental Biotechnology Department, Silesian University of Technology, Akademicka Str. 2, Gliwice 44-100, Poland.
J
J
Surmacz-Górska
Faculty of Energy and Environmental Engineering, Environmental Biotechnology Department, Silesian University of Technology, Krzywoustego Str. 8, Gliwice 44-100, Poland.
D
D
Marciocha
D018441:Biofilms; D057919:Biological Oxygen Demand Analysis; D019149:Bioreactors; D058440:Denitrification; D058465:Nitrification; D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage / Q000737:chemistry; D013997:Time Factors; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*
D009584:Nitrogen; D010758:Phosphorus; D012722:Sewage; D062065:Wastewater; D014874:Water Pollutants, Chemical