The invention discloses a
sludge age self-adaptive regulation and control method and
system based on dissolved
oxygen trend recognition. Aiming at the problem of
impact response
lag caused by difficulty in COD on-line measurement, the method comprises the following steps: under the condition of stable water inlet and
aeration, filtering and sliding window
feature extraction are performed on an on-line DO
signal to obtain a regression slope representing the change of DO along with time, and COD rising
impact is reliably identified in combination with an ORP persistence criterion. A mechanism and
machine learning fusion model is adopted to determine an identification threshold value and a target
sludge age SRT, the
sludge discharge amount is rapidly adjusted after
impact triggering, the treatment capacity is synchronously matched, and
aeration is used for assisting in maintaining DO stable. The
system integrates an online monitoring module, a DO recognizable interval judgment module, a feature calculation module, a load recognition module, an SRT decision module and a sludge
discharge execution module. According to the method, rapid impact recognition and closed-loop regulation and control can be realized without an online COD instrument, and the
impact resistance and the operation stability of the process are remarkably improved.