Possibility of Reusing Water Treatment Residue as a Growing Medium of Turfgrass in View of Physical Properties

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The possibility of reusing water treatment residue (WTR) was examined as an alternative material for sand that is now widely used as a growing medium. Physical properties such as water retention curve, relative gas diffusivity (D/D0), saturated hydraulic conductivity, porosity, available water-holding capacity and bulk density were compared between WTR and sand. D/D0, water retention capacity, total available water-holding capacity, total and capillary porosities, and bulk density were higher for WTR than for sand. This is attributed to creation of intra- and inter-aggregate pores through binding of silt and clay particles in the flocculation process of aggregates in the WTR. These physical characteristics of the WTR endorse a high possibility of reusing the WTR as an alternative for sand as a growing medium.

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