微波-生物接触氧化法处理制药废水的研究

为探讨微波与生物接触氧化法用于处理制药废水的可行性,进行了相关试验研究.考察了微波处理对制药废水中COD的去除效果,结果表明：在微波辐射时间为2、8、10 min的条件下,对COD的去除率随着微波功率的增加呈相同的变化趋势;微波功率为382.5、434、459、510 W的条件下,对COD的去除率均随微波辐射时间的延长而有不同程度的提高;降低pH值有利于提高微波处理对COD的去除率.应用微波与生物接触氧化的组合工艺处理制药废水的试验结果表明：生物接触氧化的最佳处理时间为760 min;微波处理对COD的去除率为10%～15%,生物接触氧化法直接处理时,对原水COD的去除率较低,出水COD＞300mg/L;经过微波处理后（459 W、8min）再进行生物接触氧化处理（760 min）,则对COD的总去除率＞95%,最终出水的COD＜300mg/L,表明该组合工艺用于处理制药废水是可行的.

Study on Pharmaceutical Wastewater Treatment by Combined Process of Microwave and Biological Contact Oxidation

The COD removal effects from pharmaceutical wastewater with different microwave treatments were studied. The results show that COD removal rate from the wastewater has a similar varied trend with the increase of microwave power at different treatment times, such as 2, 8 and 10 min. The COD removal rate increases with increasing treatment times at different microwave powers, such as 382.5, 434, 459 and 510 W. Decreasing the pH is helpful to remove COD from the wastewater. The combined process of microwave and biological contact oxidation was also used to treat the wastewater. The results show that the best reaction time is 760 min using biological contact oxidation. The COD removal rate is in the range of 10% - 15% when the wastewater is treated only by microwave. Similarly, the COD removal rate is also low when the wastewater is treated only by the biological contact oxidation, and COD in the effluent is over 300 mg/L. When the combined techniques are applied to treat the wastewater, the COD removal rate can reach over 95% and COD in the effluent is below 300 mg/L.