1. Landfill life = 5 years
2. The composition of waste is as described in Table3-4 for residential and commercial MSW, of which 79.5 percent is organic and 20.5 percent is inert.
3. The organic fraction (79.5%) is composed of7% plastic(considered to be inert) ,60% rapidly biodegradable material , and 12% slowly biodegradable material(see Example 11-2). The corresponding values for rapidly and slowly biodegradable material based on dry weight are 44.8 and 7.3 % ,respectively
4. Of the rapidly biodegradable organic waste , 75% is available for degradation
5. Of the slowly biodegradable organic waste , 50% is available for degradation
6. The total amount of landfill gas produced from the biodegradable fraction of rapidly and slowly biodegradable organic materials deposited each year is 14and 16 ft/lb dry solids, respectively
7. Time period for total decomposition of rapidly decomposable organic material is 5 years
8. Time period for total decomposition of slowly decomposable organic material is 15 years
Solution