Wednesday, February 27, 2008

Pollution and the Environment - Questions

1. Given a landfill for a town with a population of 12,000, expected to double in 15 years. The town has a 35 ac landfill, to be converted into a park in 20 years. Solid waste is generated at 6 lbm/capita-day. Average compacted density of landfill will be 1000lbm/yd^3. Disregard soil addition for cover and cell construction. How long will it take to fill the landfill to 6ft.

2. Biosludge is dewatered to 70% water by weight. Solids have higher heating value of 6600 btu/lbm. Dewatered sludge enters a fluidized-bed combustor with an 1000°F windbox at the rate of 14,000 lbm/hr.
a) find the specific feed characteristic.
b) Find the approximate energy in btu/hr needed by the auxiliary fuel supply

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