chapter 4: temperature inside the landfill

different ages of the waste were 35 to 50 0 C for 9-year-old waste; from 35 to 56 0 C for 6 to 7 -
year-old waste; and from 33 to 60 0 C for 2 to 3 year-old waste. Also the temperatures within
waste masses in the cells where leachate recirculation was being practiced, were found to be 5 to
10 0 C higher than the dry control cell.
Literature review presented here gives an overview of the research related to moisture
measurement, moisture movement and liquid injection. In-situ moisture measurement is
practiced by several available techniques but with certain disadvantages in each case. On the
other hand, measurement of temperature is a standard practice. Thus this research was taken
upon so as to examine the possibility of using temperature change in a landfill to track moisture
arrival.
4.3 Materials and Methods
The research described herein was performed in one part of a lined landfill, the New
River Regional Landfill (NRRL), located in Union County, Florida, USA. For the research, a 4-
ha area of the landfill was retrofitted with vertical injection wells for liquid and air injection. The
Florida Bioreactor Landfill Demonstration is decribed in more detail elsewhere (Jain, 2005). The
injection wells were installed in clusters, the deep injection wells to a depth of 18.3 m (G),
intermediate wells to a depth of 12.2 m (Y), and the shallow wells to a depth of 6.1 m (R).
To monitor moisture content, temperature and gas quality inside the landfill, a sensor
known as the MTG was developed by Gawande et al (2003) at the University of Central Florida.
These MTG clusters were installed in rows between injection clusters. To measure in-situ
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