PROCEDE DE SECHAGE COMBINE DE DECHETS, NOTAMMENT DE BOUES DE STATIONS D'EPURATION

摘要

The drying procedure uses an air/liquid heat exchanger (11) to recuperate energy from the relatively hot and humid air in a greenhouse (20), and a water/liquid heat exchanger (19) to extract heat from the treated water leaving the effluent treatment plant. The drying procedure uses an air/liquid heat exchanger (11) to recuperate energy from the relatively hot and humid air in a greenhouse (20), and a water/liquid heat exchanger (19) to extract heat from the treated water leaving the effluent treatment plant. These two sources of energy are combined with the aid of a heat pump to heat a liquid heat exchanger (8) set in the floor (27) of the green-house, where the sludge (21) is dried. The heated liquid is also passed through an air/liquid heat exchanger (6) to pre-heat the air going into the greenhouse. Additional heat can also be recuperated from biological reactions produced by mixing a quantity of dry material with the waste being dried, and geothermal energy from the soil.