Sequential solar photo-fenton-biological system for the treatment of winery wastewaters.
In this study, winery wastewaters are considered for degradation using heterogeneous photo-Fenton as a preliminary step before biotreatment. The heterogeneous photo-Fenton process assisted by solar light is able to partially degrade the organic matter present in winery wastewaters. When an initial hydrogen peroxide concentration of 0.1 M is used over 24 h of treatment, a degradation yield of organic matter (measured as TOC) of around 50% is reached. The later treatment (activated sludge process) allows the elimination of 90% of the initial TOC present in pretreated winery wastewaters without producing nondesired side-effects, such as the bulking phenomenon, which is usually detected when this treatment is used alone. The final effluent contains a concentration of organic matter (measured as COD) of 128 mg O2/L. The coupled system comprising the heterogeneous photo-Fenton process and biological treatment based on activated sludge in simple stage is a real alternative for the treatment of winery wastewater.
Mosteo
R
R
Department of Chemical Engineering and Environmental Technologies, University of Zaragoza, C/Pedro Cerbuna, 12, 50009, Zaragoza, Spain. mosteo@unizar.es
Sarasa
J
J
Ormad
Maria P
MP
Ovelleiro
J L
JL
D005419:Flavonoids / Q000032:analysis; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste; D007501:Iron; D010084:Oxidation-Reduction; D010636:Phenols / Q000032:analysis; D010777:Photochemistry; D059808:Polyphenols; D012722:Sewage / Q000382:microbiology; D013472:Sunlight; D014865:Waste Disposal, Fluid / Q000379:methods*; D014920:Wine
C045076:Fenton's reagent; D005419:Flavonoids; D007220:Industrial Waste; D010636:Phenols; D059808:Polyphenols; D012722:Sewage; D006861:Hydrogen Peroxide; D007501:Iron