Gn otent greenhause as f rela sadl nb He atmaphaje. Thes tle Andy, etc. T+ 4loer

Question

Gn otent greenhause as f rela sadl nb He atmaphaje. Thes tle Andy, etc. T+ 4loere reduces ne Carbon Problem 2. (10 points) Your town's WWTP has yet another problem- its long-time operator has retired, and a new operator has taken over town's WWT who isn't very efficient in his/her ability to facilitate denitrification. The wwTP used to convert 99% of its influent nitrogen to dinitrogen gas (N) and only 1% of its influent nitrogen to nitrous oxide (N2O); now, only 94% of influent nitrogen is converted to Ni and 6% is converted to No. Assume the NiO enutted per day is now 1 MT per day and that NO has a global warming potential 265 times that of carbon dioxide. How much has the carbon footprint of the WWTP increased because of this inefficient denitrification (in MTCE/day)? I-1.5-265 3925 mt/year in /6397.5 66.25

Explanation / Answer

a) The nitrification process used to draw 50kWh from the local grid.

Now the first law efficiency is 40%

So 50*40/100 = 20kWh is actually used for nitrification

b) The nitrification process used to draw 50kWh from the local grid. At first it has 30% first law efficiency and only 15kWh is used for nitrification. But now the first law efficiency increases to 40% and so 20kWh is used for nitrification. Here 10% of enegy savings occured when first law efficiency increases from 30% to 40%

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