According to the present invention, based on the integrated shortcut
nitrification-
anaerobic ammonium oxidation combination process effect deterioration phenomenon caused by large breeding of
nitrite oxidizing
bacteria (NOB), the measure of combination of
hydroxylamine or hydrazine pouring and
sludge age control is used so as to quickly and efficiently achieve the in-situ
recovery; and the
recovery process is divided into two stages, wherein in the first stage,
hydroxylamine or hydrazine and the like are poured to improve the activity and the abundance of
ammonia oxidizing
bacteria (AOB) and
anammox while inhibit the NOB activity so as to rapidly reduce the NO3<->-N concentration in the combination process
effluent, and in the second stage, the
sludge age control is combined to gradually eliminate the NOB being in the inhibiting state out from the
system so as to synchronically improve the NO2<->-N accumulation rate, the
Anammox activity and the
denitrification load in the combination process, and after running for a certain time, even if the pouring of the
hydroxylamine or hydrazine and the like is stopped, the
system can still maintain a stable
denitrification effect, such that it is indicated that the successful
recovery is achieved.