Anerobic aerobic bacteria nitrate nitrite reaction
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Aerobic denitrification or co-respiration the simultaneous use of both oxygen (O2) and nitrate (NO3−) as oxidizing agents, performed by various genera of microorganisms.This process differs from anaerobic denitrification not only in its insensitivity to the presence of oxygen, but also in that it has a higher potential to create the harmful byproduct nitrous oxide.
Nitrogen, acting as an oxidant, is therefore reduced in a succession of four reactions performed by the enzymes nitrate, nitrite, nitric-oxide, and nitrous oxide reductases. The pathway ultimately yields reduced molecular nitrogen (N2), as well as, when the reaction does not reach completion, the intermediate species nitrous oxide (N2O). A simple denitrification reaction proceeds as:
NO
3− → NO
2− → NO + N
2O → N
2 (g)
The respiration reaction which utilizes oxygen as the oxidant is:
C
6H
12O
6 (aq) + 6O
2 (g) → 6CO
2 (g) + 6H
2O
Hope that this helps you...
Nitrogen, acting as an oxidant, is therefore reduced in a succession of four reactions performed by the enzymes nitrate, nitrite, nitric-oxide, and nitrous oxide reductases. The pathway ultimately yields reduced molecular nitrogen (N2), as well as, when the reaction does not reach completion, the intermediate species nitrous oxide (N2O). A simple denitrification reaction proceeds as:
NO
3− → NO
2− → NO + N
2O → N
2 (g)
The respiration reaction which utilizes oxygen as the oxidant is:
C
6H
12O
6 (aq) + 6O
2 (g) → 6CO
2 (g) + 6H
2O
Hope that this helps you...
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