Application of pH, DO and OUR Control for Short-Cut Nitrification
A sequencing batch reactor was employed to treat ammonia wastewater, the pH, DO and OUR were adopted to monitor the start of short-cut nitrification. The results showed that the start of short-cut nitrification was achieved in 31days, ammonia consumption rate was higher than 90% and nitrite accumulation rate was higher than 85%, when pH, DO and OUR were applied to monitor and determine the aeration time, under the condition of temperature was 30°C. With ammonia shock loading conditions, OUR curve couldn’t indicate the end of short-cut nitrification exactly. But real-time control using pH and DO could achieve a stable shortcut nitrification under steady stage and ammonia load shocking stage.
Weiguo Pan, Jianxing Ren and Yongguang Li
W. B. Chen et al., "Application of pH, DO and OUR Control for Short-Cut Nitrification", Advanced Materials Research, Vols. 347-353, pp. 2112-2116, 2012