What are the values of BOD5:N:P respectively during aerobic and anaerobic activated sludge biological treatment of wastewater?
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What are the values of BOD5:N:P respectively during aerobic and anaerobic activated sludge biological treatment of wastewater?
A BOD/COD ratio greater than 0.3 indicates biodegradability, while the COD/N/P ratio is 100:5:1
Generally, COD/N/P = 100:5:1. However, first, the BOD/COD ratio must be greater than 0.3 for biochemical treatment to be possible.
Aerobic activated sludge process: C:N:P=100:5:1; Anaerobic sludge process: 200~300:5:1
Aerobic activated sludge process: C:N:P = 100:5:1; Anaerobic sludge process: 200–300:5:1； These are theoretical figures; in practical applications, as long as the quality of the effluent meets the required standards and the levels of ammonia nitrogen and total phosphorus are at least 5 ppm and 0.5 ppm respectively, the operational requirements will be satisfied.