Technical question: What should be the typical concentration of AAO sludge?
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This post was last edited by hesonchang214 on 2010-3-29 at 16:36: COD in the inlet water is 250 mg/L, while COD in the outlet water is 60 mg/L
There are clear regulations in the design for outdoor water supply and drainage. BOD sludge load: (0.1–0.2) kgBOD5/kgMLSS.d.
Conventional 5000-8000mg/l
The controlled concentration of sludge is related to several factors: 1. The concentration of pollutants in the effluent, such as BOD and ammonia nitrogen; theoretically, the higher the sludge concentration, the lower these values are (without taking aging factors into account). 2. The concentration of pollutants in the effluent, specifically TP; the lower the sludge concentration, the greater the amount of excess sludge discharged, and thus the lower the TP level. 3. Fan power consumption: the higher the sludge concentration, the greater the fan’s power consumption. 4. Amount of excess sludge: the higher the sludge concentration, the less excess sludge there is. 5. Concentration of pollutants in the influent water: the higher the BOD, the higher the sludge concentration. 6. Residence time: the lower the residence time, the easier it is for the sludge concentration to become high. 7. Sludge control: sludge age – the longer the sludge age, the higher the sludge concentration. The above is a one-sided view; each specific issue should be analyzed on its own, and the original poster could provide more detailed data. However, with a C/N ratio of 3.5, TN remains high easily. Unless the BOD is really good, and ideally, most of the consumption occurs in the anaerobic or facultative aerobic stage. TN is the only one that can go down.