engleski

Correlations between field capacity, porosity, solid particle density and dry density of a mechanically and biologically (biodried) treated reject waste stream

Several parameters are crucial for the proper functioning of bioreactor landfills (BL): field capacity (θk), porosity (n), solid particle density (ρs) and dry density (ρd). This paper considers the correlations between parameters, as measured on mechanically and biologically treated waste stream suitable for a BL. In total, 53 waste samples were tested and the n, ρs and ρd values were recorded. The related θk values were calculated from the modified ρd vs. θk relationship, published by Fungaroli and Steiner (1979). Through modified expressions, the following relationships were derived: second degree polynomial n vs. θk and first degree polynomial ρs vs. θk. In addition, the first degree polynomial ρdvs. n is proposed. The outlined relationships clearly highlight the contribution of n and ρs on corresponding θk values. Therefore, for optimal operating conditions of the BL, continuous monitoring of the mentioned parameters and proper adjustment of the θk value is necessary.

Solid particle density, Porosity, Bioreactor landfills, Field capacity, MBT

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