Landfill Leachate Management Concepts

The video tutorial explains a 2008 problem involving a landfill with a given area and rainfall. It covers the calculation of the volume of water infiltrating the landfill, the mass of cadmium released into the surrounding soil, and the cost of treating leachate. The tutorial emphasizes unit conversion, scientific notation, and percentage calculations.

What is the area of the landfill mentioned in the problem?

• 5,000 m²

• 10,000 m²

• 20,000 m²

• 15,000 m²

What percentage of rainfall infiltrates through the landfill cover soil?

• 75%

• 50%

• 25%

• 100%

What is the concentration of cadmium in the leachate withdrawn from the landfill?

• 1 gram per cubic meter

• 2 grams per cubic meter

• 3 grams per cubic meter

• 4 grams per cubic meter

How is the volume of water infiltrated through the landfill calculated?

• By dividing length by width and height

• By subtracting length from width and height

• By adding length, width, and height

• By multiplying length, width, and height

What is the height of the rainfall in meters after conversion?

• 0.3 meters

• 0.2 meters

• 0.4 meters

• 0.1 meters

What percentage of leachate is treated by the drainage system?

• 90%

• 80%

• 70%

• 60%

What percentage of leachate is released into the surrounding soil?

• 10%

• 5%

• 20%

• 15%

How many kilograms of cadmium are released into the surrounding soil per year?

• 0.5 kg

• 1 kg

• 1.5 kg

• 2 kg

What is the cost of treating one cubic meter of leachate?

• $5

• $15

• $20

• $10

What is the total annual cost for treating the leachate from the drainage system?

• $8,000

• $7,000

• $9,000

• $10,000