|Sensing, Analyzing, and Forecasting Evaluation (SAFE) System for Bioreactor Landfills
|Principle Investigator: ||Dr. Milind V. Khire, P.E.|
|Funding Agency: ||National Science Foundation|
During the past
two decades, the majority of geotechnical and geoenvironmental research
related to landfills using in-situ sensing systems and field methods
has been focused on securing the boundaries of the landfills - caps
and liners. The proposed research is about sensing the "heart" of
landfills, which is the waste representing over 99% of the landfill.
The proposed approach will use the data collected from sensors embedded
in permeable blankets primarily used for routine leachate recirculation
to continuously and in real-time model the changes in the hydraulic
and thermal conductivities of waste. This is critical because hydraulic
and thermal properties of the waste change as a result of settlement,
decomposition, age, and other operational variables. Currently, we
have only limited knowledge on the long-term behavior and risks associated
with "megafills" operated as bioreactors. In addition, the proposed
approach will be independently confirmed by doing controlled lab experiments
using a lab-scale physical model of landfill followed by comprehensive
numerical modeling and by conducting field tracer tests at an instrumented
landfill site in Michigan.
addresses uses of sensors coupled with computer modeling to optimize
long-term performance of municipal solid waste landfills operated
as bioreactors in the 21st century. The proposed research involves
the use of data sensed from a variety of sensors embedded in permeable
blankets devised by the PI and primarily used for leachate recirculation
in bioreactor landfills to evaluate changes in in-situ hydraulic and
thermal conductivities of waste on a continuous and real-time basis.
In addition, tracer tests at an instrumented landfill and controlled
lab tests are proposed to independently verify the findings of the
sensor data using computer models. This multiyear project would allow
the research team to collect data from a bioreactor landfill in Michigan
that has been comprehensively instrumented over the last few years.
The educational activities integrated within this research plan involve
active learning projects using a plexi-glass landfill model and introducing
waste management for high-school and undergraduate students. Active
ties of Michigan State University with local high schools and special
programs for minority and female students from the mid Michigan area
would allow us to achieve participation of minorities and female students.
- Haydar, M., and Khire, M. (2005), "Leachate Recirculation Using Horizontal
Trenches in Bioreactor Landfills" Journal of Geotechnical &
Geoenvironmental Engineering, American Society of Civil Engineers,
Vo. 131, No. 7, 837-847.
- Haydar, M., and Khire, M. (2004), "Numerical Evaluation of Heterogeneity and
Anisotropy of Waste Properties on Leachate Recirculation in Bioreactor
Landfills" The Journal of Solid Waste Management & Technology,
Vol. 30, No. 4, 233- 243.
- Haydar, M., and Khire, M. (2006), "Geotechnical Sensor System to Monitor Injected
Liquids in Landfills" Geotechnical Testing Journal, American
Society of Testing of Materials, o. 29, No. 1, in press.
- Khire, M., and Haydar, M. (2004), "Leachate Recirculation in Bioreactor Landfills
Using Geocomposite Drainage Material" Journal of Geotechnical
& Geoenvironmental Engineering, American Society of Civil Engineers,