Winery wastewater treatment by a combined process: long term aerated storage and Fenton's reagent.
The degradation of the organic pollutants present in winery wastewater was carried out by the combination of two successive steps: an aerobic biological process followed by a chemical oxidation process using Fenton's reagent. The main goal of this study was to evaluate the temporal characteristics of solids and chemical oxygen demand (COD) present in winery wastewater in a long term aerated storage bioreactor. The performance of different air dosage daily supplied to the biologic reactor, in laboratory and pilot scale, were examined. The long term hydraulic retention time, 11 weeks, contributed remarkably to the reduction of COD (about 90%) and the combination with the Fenton's reagent led to a high overall COD reduction that reached 99.5% when the mass ratio (R = H(2)O(2)/COD) used was equal to 2.5, maintaining constant the molar ratio H(2)O(2)/Fe(2+)=15.
Lucas
Marco S
MS
Centro de Química, Universidade de Trás-os-Montes e Alto Douro, Apartado 1013, 5001-801, Vila Real, Portugal. mlucas@utad.pt
Mouta
Maria
M
Pirra
António
A
Peres
José A
JA
D000332:Aerobiosis; D000388:Air; D001673:Biodegradation, Environmental; D006861:Hydrogen Peroxide / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000032:analysis*; D007501:Iron / Q000737:chemistry*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000302:isolation & purification; D010865:Pilot Projects; D013997:Time Factors; D014835:Volatilization; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*; D014920:Wine
C045076:Fenton's reagent; D007220:Industrial Waste; D006861:Hydrogen Peroxide; D007501:Iron; D010100:Oxygen