Compare the use of virgin paper and recycled paper Compare from an environmental

Question

Compare the use of virgin paper and recycled paper Compare from an environmental point of view the use of recycled paper and the use of paper obtained from paper pulp. The recycled paper has been obtained from paper wastes transported in 16-t trucks from a distance of 1000 km. The total emissions of carbon dioxide, CO2, and the generated solids in kg of them are used as comparison parameters. It is desirable to compare the derived effects of the following two scenarios: purchasing a 400-q pack of new writina paper at the comer stationery shop drivinq to buy a similar pack of recycled paper at an establishment 1 km away. Only the ELs due to raw materials and transportation are considered. Use the following environmental loads: Compare the use of paper towels and an air dryer to drying the hands. Compare environmentally the use of paper towels for drying hands and the use of a hand-dryer supplied with electricity from a gas thermal power plant or from an eolic power plant. The considered comparison parameters are the emissions of carbon dioxide. CO2, and sulfur dioxide. SO2. Suppose that the weight of a paper towel is 7 g and that the electrichand-dryer is 2000 W and works for 30 s. With these data, determine the best way, from an environmental point of view, to dry the hands. The ELs related to the paper and the use of electricity are assumed to be the following: Electricity consumption: Ec (kWh); Ec = (2000 (J/s)1000)(33/3600) = 1.67 X 10-2kWh.

Explanation / Answer

2)Pulp Paper :

Kg Co2   =1.61

Waster Paper:

Kg Co2 = 1.03

Difference = 0.57 :

Waster paper is better

Pulp Paper :

Kg Solids : 1.73 * 10^-1 = 0.173

Waster Paper:

Kg Solids : 7.06 * 10 ^ -2 = 0.0706

Difference

= 0.173 - 0.0706

=0.1024

Waster Paper is better having 0.0706

Pulp Paper

car

kgCo2 = 2.16 * 10 ^1 = 0.216

Kg Solids = 7.50 * 10^- 6=0.0000075

Waster Paper

Truck

kgCo2 = 3.46 b*10^-1 =0.346

Kg Solids = 7.19*10^ -2=0.0719

Comparing to truck and car, Car is better than truck

We can purchase easily new paper from near stationary shop better than traveling 1,000 km to recycle paper and truck make pollute overly by transportion

But in the raw materials side, recycle paper is better than virgin paper

___________________________________________________________________________________

Related Questions

Navigate

• Browse (All)
• Browse C
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.