1. MUNICIPAL SOLID WASTE BIODEGRADATION, COMPACTION AND WATER HOLDING CAPACITY. RAJENDRA.D. VAIDYA

2. Thank You Dr. Dough Goldsmith (committee member) Dr. Clifford Randall (committee member) Dr. Gary Hater (WMI)

3. ABSTRACT Waste characterization parameters. Solid waste field capacity study. Development of laboratory methodology. Results and interpretation. Conclusion and recommendations.

4. In Virginia for year 2001, 82.3% - 15,823,785 tons - was landfilled. Landfill capacity for MSW - 18.3 years

5. Aspects of waste characterization

6. Waste Properties

9. Field Capacity Compaction to desired density Landfills - 2000 lbs/yd3 Compressed air – 40 psi Dynamic compaction 500 ft-lbs Static compaction 75- 40 lbs 3-5 days

10. Methodology Waste available 8-14 lbs wet Volume fits in bucket sized 30.5 cm dia, 52 cm height 40 psi – 1psi = 1255 lbs/yd2 500 ft-lbs, 1 ft from initial surface 75-40 lbs static (775-443 lbs/yd2)

13. Field Capacity- Compressed Air

26. ln(S/t) = -(a + b ln t)

28. Summary and Conclusion  Independency of final moisture on the initial moisture.  Reproducibility of method to yield the same moisture retention value (1-2 % range) for repeated runs with different initial moistures.(at 95 % )  Field Capacity correlates with Cellulose  Hyperbolic model best fit,least variability

29. Recommendations Statistical validation of lab test Calibration of Field Capacity and Hyperbolic model Usage to best fit various landfill sites

30. THANK YOU