Question:

a) List, with appropriate justifications, the most significant design parameters while constructing a landfill

b) Draw the pattern of gas generation in a typical landfill and indicate the different phases.

c) Using the Landgem model of Q =∑ 2KMLoe^-kt where Q yearly methane generation rate at time t after solid waste placement in m³ per yr
M Solid waste placed t years before present in landfill

k First order rate constant in yr^-1

Lo Potential methane generation capacity of the msw in m³ per ton

t Time since start of gas generation

Determine the peak gas production during the first year for a landfill receiving 167000 tons per year. The landfill gas constant is 0.0307 yr^-1 and the methane generation potential is 140 m³/tonne.