From: Effect of COD:N ratio on biological nitrogen removal using full-scale step-feed in municipal wastewater treatment plants
WWTP
Influent COD:N ratio (g COD g−1 N)
Nitrification rate
(g NH4+-N g− 1 VSS d− 1)
Denitrification rate
(g NO3−-N g− 1 VSS d− 1)
TN removal (%)
SF1
4:1
0.55 ± 0.02
0.047 ± 0.003
48 ± 10
SF2
10:1
1.23 ± 0.15
0.12 ± 0.03
59 ± 2