Brodie, Graham, Destefani, Ryan, Schneider, Philip A., Airey, Lyn, and Jacob, Mohan V. (2014) Dielectric properties of sewage biosolids: measurement and modeling. Journal of Microwave Power and Electromagnetic Energy, 48 (3). pp. 147-157.

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Abstract

The measurement of dielectric properties of materials is critical to understanding the electromagnetic field distribution in the materials. Reliable knowledge of the dielectric constant is also important when designing a microwave pyrolysis unit for effective pyrolysis of materials of interest. The dielectric probe technique was used to evaluate the dielectric properties of biosolids. Biosolid samples were collected from various sources and the dielectric properties were measured across the microwave frequency range of 1.0 GHz to 10.0 GHz. The dielectric constant of the materials varied in the range from 80 to 2 and depended mainly on the origin of the sample, the electrical conductivity and the moisture content of the material. A mathematical model was developed to accurately predict the values of complex permittivity. This model was verified using the measured data.

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