改性矿物吸附法和O3氧化法对维生素B12废水脱色处理

采用改性矿物吸附法和O3氧化法对某制药厂维生素B12废水进行脱色处理。以废水色度去除率大于50％为目的，通过实验确定改性矿物吸附法和O3氧化法处理维生素B12废水的最佳工艺条件：废水的pH为3．00，有机化膨润土的投加量为5g／L，PAC的投加量为6g／L，投加有机化膨润土后搅拌时间为30min时，废水的色度去除率可达到51．3％，处理成本为12．85元／t。O3氧化法的最佳条件：废水的pH保持不变，O3流量为5g／h，反应时间为2min，废水的色度去除率可达到68．8％，处理成本为0．96元／t。对比这2种方法，O3氧化法处理该废水成本更低、效率更高，并且能提高废水的可生化性以便后续处理。

Decoloration treatment of wastewater containing vitamin B12 by modified mineral adsorption and O3 oxidation

Abstract Wastewater containing vitamin B12, which came from a pharmaceutical factory, was treated by methods of modified mineral adsorption and O3oxidation. In order to get over 50% of colority removal rate, the optimum operating conditions of two methods were obtained by experiments. The results were shown that the opti- mal conditions of modified mineral adsorption treatment were as follows： the wastewater pH value of 3.00, orga- no-bentonite dosage of 5 g/L, PAC dosage of 6 g/L, mixing time of 30 minutes, under those conditions, the re- moval rate of colority was 51.3% and the treatment cost was 12. 85 yuan per ton; the optimal conditions of O3ox- idation treatment were as follows ： the wastewater pH value of 2.70, the 03 flow of 5 g/h, the reaction time of 2 rain, under those conditions, the removal rate of colority was 68.8% and and the treatment cost was 0.96 yuan per ton. Comparing the two methods, 03 oxidation treatment is cheaper, more efficient and can improve the bio- degradability of wastewater.