Thermochemical treatment of solid and wastewater effluents originating from the olive oil food industry
(EN)
Taralas, G.
(EN)
Πανεπιστήμιο Ιωαννίνων. Σχολή Θετικών Επιστημών. Τμήμα Χημείας
(EL)
Taralas, G.
(EN)
Thermochemical treatment of waste effluents originating from the olive oil food industry was investigated at total pressure conditions slightly above atmospheric pressure (103-104 kPa) and temperatures of 700-855 degrees C. The experimental data were obtained in a laboratory-scale reactor. Wastewater that was concentrated by means of evaporation/drying (denoted as cww), with a biomass formula of CH1.3O0.5, mixed with olive husks (kernels) was used here as a sample fuel (i.e., a mixture of olive husks (kernels) and cww (95%/5%, as determined from the low heating value, LHV)). Pretreatment of the specific solid waste effluent by washing (leaching) and fractionation was studied. The particle size (d(P)) class of the olive husks (kernels) varied between 0.35 mm < d(P) < 0.50 mm (with a biomass formula of CH2.2O0.7) and 0.50 mm < d(P) < 1.0 mm (with a biomass formula of CH2.2O0.6). For H2O-vapor thermal treatment of the evolved gas obtained during pyrolysis of the biofuel used here, the composition products were analyzed. Gas compositions (viz., CO, CO2, O-2, CH4, and C2+), along with the amounts of benzene and toluene, tar/liquid phase, and char total yields are given. :In thermal treatment experiments in air, the major gas was CO2. The effect of the moisture content and the particle size class of the biofuel samples on the variation of the devolatilization rate, relative to devolatilization time, was determined at a given furnace temperature regime.
(EN)
