# Homework 5 1. Emission of methane (CH4) from Plant A was 200x105 kg. What is this as an equivalent emission of CO2 if a 20-year time horizon is considered? And in a 100-year time horizon? 200x105 *72=...

Homework 5
1. Emission of methane (CH4) from Plant A was 200x105 kg. What is this as an equivalent emission of CO2 if a 20-year time horizon is considered? And in a 100-year time horizon?
200x105 *72= CO2 eq.
200x105 *25 =
2. Emissions from a coal fire plant is 100 kg CO2, 5 Kg of CH4, and 0.1 kg of N2O, Calculate the CO2 equivalent in a 100-year time horizon.
100 *1 = 100
5 * 25 = 125
0.1 * 298 = 29.8
XXXXXXXXXX =
3. Emissions from a manufacturing plant contains 10 kg SO2, 5 kg NO2, 3 kg NH4. Please calculate acidification potential in kg SO2 eq. (use the conversion factors provided in the lecture 8)
10*1= 10
5* 0.7 = 3.5
3 * 0.89 = 2.67
XXXXXXXXXX =
4. A composter is used to treat food wastes on campus. The composter release 100 kg CO2 to air per day and use 20 kWh electricity (Electricity ca
on footprint: 742 g/kWh). If the same amount of waste is buried in landfills, it will release 36 kg CH4 to air. Which one is better way to treat food wastes (landfills or composter)?
Composter:
100kg CO2 *1 = 100kg CO2 eq
20 kwh * 0.742kg/kwh = 14.84 kg CO2 eq
100 – 14.84 = 85.16 kg CO2 eq.
Landfill:
36 kg CH4 * 25 = 900 kg cO2 eq.
5. A wastewater treatment plant discharged 100 kg COD, 3 kg NO3-, and 0.2 kg TP(total phosphorus) to a river. Please calculate the eutrophication potential by kg PO4 eq. and kg N eq. with CML standard.

Answered 4 days AfterApr 11, 2022

## Solution

Preeti answered on Apr 15 2022
Bauxite Ore , in ground , at mine site
Elementary

Iron Ore , at blast furnace
Elementary

Trees , standing in forest
Elementary

Corn plant , in field
Elementary

Wood Chips , at saw mills

Intermediate
Wood chips from the tree will goes to saw mills for making furniture
Corn Grain , at wet mill

Intermediate
The corn collected from the field will be goes to wet mill
Limestone , crushed at mine...
SOLUTION.PDF