Data from: Effect of organic matters on anammox coupled denitrification system: when nitrite nitrogen was sufficient

Anaerobic ammonia oxidation (ANAMMOX) and denitrification can work
together to weaken the influence of organic matter on anaerobic ammonia
oxidation bacteria (AAOB) and improve nitrogen removal performance. As the
common substrate of ANAMMOX and denitrification, nitrite nitrogen will
also affect nitrogen removal performance when it is insufficient, which is
not conducive to reflect the endurance of ANAMMOX reactor to organic
matter. The UASB continuous flow experiment was carried out to investigate
the effect of the concentration of glucose and sodium acetate on nitrogen
removal performance of ANAMMOX reactor under the condition of sufficient
nitrite nitrogen. With glucose as the organic matter, when the COD
concentration increased to 200 mg/L, nitrogen removal performance of the
system began to decrease significantly, and the anammox activity was
significantly inhibited. With sodium acetate as the organic substance, the
anammox activity was affected when the COD was 20 mg/L. Adequate nitrite
nitrogen could relieve the inhibition of the coupling system by a low
concentration (COD<200mg/L) of glucose organic matter. However, it
could not relieve the inhibitory effect of sodium acetate. With the
increase of organic concentration, the biological density of AAOB in
granular sludge gradually decreased, while the biological density of
denitrifying bacteria increased gradually.