Advanced treatment of wastewater from sauce-flavor Baijiu production with reusing distillers'grains by Cu/AC ozone catalytic oxidation
The advanced treatment effect of the micro-bubble ozone catalytic oxidation process with copper oxide loaded on activated carbon(Cu/AC)as catalyst on biochemical effluent from sauce-flavor(Jiangxiangxing)Baijiu production with reusing distillers'grains wastewater was studied.The results showed that the catalyst addition in sequence batch reactors was 15 g/L,the ozone addition was 12.5 mg/min,and initial pH was 7.5,the re-moval efficiencies of chemical oxygen demand(COD)and ultra violet absorption value at wavelength 254 nm(UV254)were 79.0％and 94.7％,respec-tively.After multiple cycles of catalyst usage,the decreases in COD and UV254 removal efficiencies were less than 5％.Characterization revealed a smooth morphology of the catalyst surface,with copper predominantly existing as CuO and dispersed on AC,enhancing catalytic performance.The removal efficiencies of COD and UV254 remained at 76％and 92％after long-term continuous operation,indicating strong stability and shock resis-tance.The results provided a reference for the application of the micro-bubble ozone catalytic oxidation system in treating wastewater from sauce-fla-vor Baijiu production with reusing distillers'grains.
wastewater from sauce-flavor Baijiu production with reusing distillers'grainsmicro-bubble ozoneheterogeneous catalystcatalyst char-acterization
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