催化臭氧氧化法处理维生素C生产废水

Treatment of Vitamin C Production Wastewater by Catalytic Ozone Oxidation Process

采用催化臭氧氧化工艺处理维生素C生产废水。考察了不同工艺条件对废水COD、色度、Ca^(2+)去除率的影响。实验结果表明,催化剂为TiO_2(20%,质量分数,下同)-SiO_2(80%),反应温度75℃,水力停留时间30min的最佳工艺条件下,处理后出水的COD、色度和p(Ca^(2+))分别为63.9 mg/L、0倍和49.4 mg/L,COD、色度和Ca^(2+)去除率分别为78%、100%和95%。出水水质指标满足GB8986—1996《污水综合排放标准》。

Vitamin C production wastewater was treated by catalytic ozone oxidation process. The effects of the process conditions on the removal of wastewater COD, chroma and Ca2＋ were studied. Under the optimum process conditions of using TiO2（20% of mass fraction）-SiO2（80% of mass fraction） as catalyst, reaction temperature 75 ℃ and hydraulic retention time 30 min, the COD, chroma and p（Ca2＋） of the effluent are 63.9 mg/L, 0 time and 49.4 mg/L with 78%, 100% and 95% of removal rates respectively. The effluent quality can meet the national discharge standards of GB8986-1996.