You wish to design a plug-flow biofilm reactor without recycle for denitrification to N2 of a…

You wish to design a plug-flow biofilm reactor without
recycle for denitrification to N2 of a wastewater containing 65 mg NO;-N/l and
no ammonia, and you have selected acetate to add as the electron donor for the
reaction. (a) What concentration of acetate should be added to the wastewater
to achieve complete removal of nitrate by denitrification? (b) Given the above
concentration of acetate added to the wastewater prior to treatment, is the
reaction at the entrance to the reactor rate-limited by acetate, nitrate, or
neither? Show appropriate calculations to support your conclusion. Assume
»

You wish to design a plug-flow biofilm reactor without
recycle for denitrification to N2 of a wastewater containing 65 mg NO;-N/l and
no ammonia, and you have selected acetate to add as the electron donor for the
reaction. (a) What concentration of acetate should be added to the wastewater
to achieve complete removal of nitrate by denitrification? (b) Given the above
concentration of acetate added to the wastewater prior to treatment, is the
reaction at the entrance to the reactor rate-limited by acetate, nitrate, or
neither? Show appropriate calculations to support your conclusion. Assume that
nitrate is used for cell synthesis, and that the following characteristics
apply for reaction kinetics and biofilm characteristics:

»

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