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ASM-AN model in WEST
We are using ASM-AN model for simulate Municipal WWTP which works with alternative cycles denitrification-nitrification.
In the Guyer matrix of the model we changed the expression for the heterotrophic denitrification rates eliminating the terms:
1) NO2/(NO2+NO3) from the second step of the denitrification
2) NO3/(NO2+NO3) from the first step of the denitrification
We did this in order to avoid the excessive nitrite accumulation that is not observed in the our plant.
This acculation is too high because of the nitrate concentration is one order magnitude higher than the nitrite concentration in a municipal WWTP.
do you have any suggestions about this?
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