Pilot scale annular plug flow photoreactor by UV/H2O2 for the decolorization of azo dye wastewater.
A pilot scale annular plug flow photoreactor with thin gap size, which combines with UV irradiation and hydrogen peroxide, was employed to deal with colored dyeing wastewater treatment. In the experiment, a mono-azo dye acid orange 10 was the target compound. The experimental parameters such as flow rate, hydrogen peroxide dosage, UV input power, pH and dye initial concentrations in a pilot scale photoreactor with flow rate of 9.32 m3day(-1) were investigated. Ultimately, the degradation rates were calculated and compared with a 100-l batch reactor. In our plug flow photoreactor design, the degradation rate of acid orange 10 was 233 times higher than that of 100-l annular batch reactor with same UV light source. The residence time needed for 99% decolorizing of 100 l of 20 mgl(-1) acid orange 10 wastewater was 26.9 min for the thin gap plug flow reactor and was far shorter than that of batch reactor needed.
Shu
Hung-Yee
HY
Department of Environmental Engineering, Hungkuang University, No. 34 Chung-Chie Rd., Shalu, Taichung 433, Taiwan, ROC. hyshu@sunrise.hk.edu.tw
Chang
Ming-Chin
MC
D001391:Azo Compounds / Q000737:chemistry*; D003116:Color; D004396:Coloring Agents / Q000737:chemistry*; D006861:Hydrogen Peroxide; D006863:Hydrogen-Ion Concentration; D007220:Industrial Waste / Q000517:prevention & control*; D007700:Kinetics; D009994:Osmolar Concentration; D010777:Photochemistry / Q000295:instrumentation / Q000379:methods*; D010865:Pilot Projects; D013783:Textile Industry; D014466:Ultraviolet Rays; D014877:Water Pollution, Chemical / Q000517:prevention & control*
D001391:Azo Compounds; D004396:Coloring Agents; D007220:Industrial Waste; D006861:Hydrogen Peroxide