Method and device for real-time on-line in-situ determination of heterotrophic bacterium yield coefficient

The invention provides a method and device for real-time on-line in-situ determination of a heterotrophic bacterium yield coefficient, and the method comprises the following steps: S1, arranging the device in a biological pool, and carrying out cleaning, rinsing and sludge feeding in the device; s2, aeration and sludge feeding are performed in the device, aeration is stopped after a period of time, a dissolved oxygen and time curve is drawn, the sludge concentration is measured, the specific respiration rate is calculated, when the specific respiration rate is smaller than or equal to 1 mgO2/gMLVSS.h, the step S3 is performed, and otherwise, the step S2 is performed again; s3, an aeration device in the device is started, when the dissolved oxygen concentration is larger than or equal to 6 mg/L, aeration is stopped, and when the dissolved oxygen concentration is smaller than or equal to 6 mg/L, chemicals are added into the device; and S4, in a continuous determination stage, continuously monitoring and calcula