Deaeration can be thought of as a slow, bacteria-mediated titration of O₂ by CH₂OH. The concentration of O₂ in seawater at 26 °C is 207.8 μM. How many liters of methanol (FM 32.04, density = 0.791 g/mL) are required by Reaction 1 for 2.9 million liters of aquarium water? volume of methanol: 16273 Write the net reaction showing nitrate plus methanol going to nitrogen. net reaction: 6NO3 +5CH, OH3N₂ + 7H₂O + 5CO₂ + 60H- How many liters of CH, OH are required by the net reaction for 2.9 million liters of aquarium water with a nitrate concentration of 5900 μM? volume of methanol: 14258 In addition to consuming methanol for Reactions I through 3, the bacteria require 30% more methanol for their own growth. What is the total volume of methanol required to denitrify 2.9 million liters of aquarium water? L volume of methanol: 14733 L L

Deaeration can be thought of as a slow, bacteria-mediated titration of O₂ by CH₂OH. The concentration of O₂ in seawater at 26 °C is 207.8 μM. How many liters of methanol (FM 32.04, density = 0.791 g/mL) are required by Reaction 1 for 2.9 million liters of aquarium water? volume of methanol: 16273 Write the net reaction showing nitrate plus methanol going to nitrogen. net reaction: 6NO3 +5CH, OH3N₂ + 7H₂O + 5CO₂ + 60H- How many liters of CH, OH are required by the net reaction for 2.9 million liters of aquarium water with a nitrate concentration of 5900 μM? volume of methanol: 14258 In addition to consuming methanol for Reactions I through 3, the bacteria require 30% more methanol for their own growth. What is the total volume of methanol required to denitrify 2.9 million liters of aquarium water? L volume of methanol: 14733 L L

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

100%

Deaeration can be thought of as a slow, bacteria-mediated titration of O₂ by CH₂OH. The concentration of O₂ in seawater at
26 °C is 207.8 μM. How many liters of methanol (FM 32.04, density = 0.791 g/mL) are required by Reaction 1 for 2.9 million
liters of aquarium water?
volume of methanol:
16273
Write the net reaction showing nitrate plus methanol going to nitrogen.
net reaction:
6NO3 +5CH, OH3N₂ + 7H₂O + 5CO₂ + 60H-
How many liters of CH, OH are required by the net reaction for 2.9 million liters of aquarium water with a nitrate concentration
of 5900 μM?
volume of methanol: 14258
In addition to consuming methanol for Reactions I through 3, the bacteria require 30% more methanol for their own growth.
What is the total volume of methanol required to denitrify 2.9 million liters of aquarium water?
L
volume of methanol: 14733
L
L

Managing a saltwater aquarium. A tank at the New Jersey State Aquarium has a volume of 2.9 million liters. Bacteria are used
to remove nitrate that would otherwise build up to toxic levels. Aquarium water is first pumped into a 2700-L deaeration tank
containing bacteria that consume O₂ in the presence of added methanol:
Bacteria
2 CH₂OH + 30₂
Methanol
3 NO3 + CH3OH
Nitrate
Anoxic (deoxygenated) water from the deaeration tank flows into a 1500-L denitrification reactor containing colonies of
Pseudomonas bacteria in a porous medium. Methanol is injected continuously, and nitrate is converted into nitrite and then
into nitrogen:
2 NO₂ + CH₂OH
Bacteria
2 CO₂ + 4H₂O
Bacteria
(1)
3 NO₂ + CO₂ + 2H₂O (2)
Nitrite
N₂ + CO₂ + H₂O + 2OH-
(3)

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