改性矿物吸附法和 O3氧化法对维生素 B12废水脱色处理简

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5 g/L，PAC的投加量为6 g/L，投加有机化膨润土后搅拌时间为30 min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5 g/h，反应时间为2 min，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

Wastewater containing vitamin B₁₂,which came from a pharmaceutical factory,was treated by methods of modified mineral adsorption and O₃ oxidation. 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 optimal conditions of modified mineral adsorption treatment were as follows: the wastewater pH value of 3.00, organo-bentonite dosage of 5 g/L, PAC dosage of 6 g/L, mixing time of 30 minutes, under those conditions, the removal rate of colority was 51.3% and the treatment cost was 12.85 yuan per ton; the optimal conditions of O₃ oxidation treatment were as follows: the wastewater pH value of 2.70, the O₃ flow of 5 g/h, the reaction time of 2 min, 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, O₃ oxidation treatment is cheaper, more efficient and can improve the biodegradability of wastewater.