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| Experimental study on monitoring moisture content in municipal solid wastes with high organic content: using coated TDR probe |
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Abstract The aims of this experimental study were to evaluate the applicability of coated TDR probes in highly conductive MSWs with high organic content. TDR probes with identical geometry but different kinds of coating, i.e., coating with an epoxy-resin composite and PVC tube, were produced. The effect of the coating treatment on the dielectric permittivity measurement and the influence area of the TDR probes were evaluated. Based on the evaluation, the probe with a PVC coating on the 95% of the rod length was recommended for the application in MSWs. The recommended TDR probe was calibrated and installed in two laboratory cells, i.e., one containing fresh MSWs and the other containing decomposed MSWs. The change of moisture content in the wastes was measured during and after leachate infiltration into the cells. The measurements demonstrated that the recommended coated TDR probe was effective in measuring the moisture content in the MSWs with a high organic content and was able to capture the hydraulic response of MSWs with transient seepage. The measurement of moisture content at the steady state condition was close to the result that calculated from water balance analysis, and the maximum difference was less than 5%.
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Received: 22 November 2013
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