Comparison of Simultaneous Nitrification and Denitrification for Three Different Reactors

Table 1

Summary of biological nitrogen removal processes.

Process	Major reaction	Required atmospheric condition
Nitrification	NH4-N + O2 NO2-N NO3-N	Aerobic
Denitrification	NO3-N N2	Anaerobic
SND	NH4-N + O2 NO3-N N2	Aerobic and anaerobic
SHARON	NH4-N + O2 0.5NH4-N + 0.5NO2-N	Aerobic (low O2)
Anammox	NH4-N + NO2-N N2	Anaerobic