(b) Ammonia oxidizing bacteria (AOB) play an important role in nitrogen cycle. They are also utilized in engineered systems to remove ammonia in wastewater treatment. They obtain energy by oxidizing ammonia NH; into nitrite (NO2) and reducing oxygen to water. Balance the reduction and oxidation reactions driven by AOB. (c) Combine the redox reactions into a single reaction. (d) Find AG° for the combined reaction.

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(b) Ammonia oxidizing bacteria (AOB) play an important role in nitrogen cycle. They are also utilized in engineered
systems to remove ammonia in wastewater treatment. They obtain energy by oxidizing ammonia NH3 into nitrite (NO2)
and reducing oxygen to water. Balance the reduction and oxidation reactions driven by AOB.
(c) Combine the redox reactions into a single reaction.
(d) Find AG° for the combined reaction.
(e) Find AG for the given conditions: [NH3] = 2.7 × 10³ M; po2 = 0.21 atm; [NO2]= 1.2 × 10³ M. If necessary assume
neutral pH (i.e., pH = 7). Are the given conditions favourable for AOB growth?
Transcribed Image Text:(b) Ammonia oxidizing bacteria (AOB) play an important role in nitrogen cycle. They are also utilized in engineered systems to remove ammonia in wastewater treatment. They obtain energy by oxidizing ammonia NH3 into nitrite (NO2) and reducing oxygen to water. Balance the reduction and oxidation reactions driven by AOB. (c) Combine the redox reactions into a single reaction. (d) Find AG° for the combined reaction. (e) Find AG for the given conditions: [NH3] = 2.7 × 10³ M; po2 = 0.21 atm; [NO2]= 1.2 × 10³ M. If necessary assume neutral pH (i.e., pH = 7). Are the given conditions favourable for AOB growth?
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