Treated sewage sludge containing a flocculant is discharged from bottom of a bin, with the discharge being facilitated by heating sloped walls of the bin an amount sufficient to increase the ability of the sludge to slide along sloped bin walls. The flocculant in the sludge includes a polymeric material which, when heated to a sufficient temperature effects a phase separation of the polymeric material from water, decreasing the viscosity of the polymeric material, facilitating its sliding along the sloped walls. The heating of the polymeric material in the flocculant enables the sloped walls of the bin to be flatter than they would otherwise be, allowing an enhanced volume of sludge to be present in the bin. A programmable logic computer controls the provision of heat to the sloped walls, as well as controlling an openable closure at the bottom of the bin and/or controlling the rotation of a displacement device in the bin.
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