超声波联合混凝法处理制药废水的研究

为了探讨单独超声波降解法、混凝法及2种方法联合处理制药废水的可行性，研究了超声波辐射时间、功率以及混凝剂的种类、浓度对制药废水中COD和NH3-N去除的影响。结果表明：（1）超声波单独处理制药废水时，COD和NH3-N去除率先随着超声波辐射时间(200~1000 s)的增大而增大，最佳时间为1000 s，COD和NH3-N的最大去除率分别为27.80%、45.34%；超声波辐射时间为1000 s，COD和NH3-N去除率随着超声波辐射功率的增大而先增大后减小。（2）单独用混凝剂处理制药废水时，COD的去除率随着混凝剂的浓度(0.1~0.6 g/L)的增大而先增大后减小，PAC在0.3 g/L时为最佳，COD的去除率为40.10%，NH3-N的平均去除率保持在5%左右。（3）在各自的最佳状态下，先用超声波处理后加混凝剂比先加混凝剂后用超声波处理的COD和NH3-N的去除率高，分别为61.24%、58.63%。试验表明，先用超声波处理后加混凝剂比先加混凝剂后用超声波处理对COD和NH3-N的去除率高。

The Study of Ultrasonic and Coagulation to Deal with Pharmaceutical Wastewater

In order to study the removal rates of the COD and NH 3-N of pharmaceutical wastewater with the separate ultrasonic degradation,coagulation and combined two treatments,the removal rates of the COD and NH 3-N with ultrasonic radiation time,power and coagulant species were studied.The results showed that：（1） the removal rates of the COD and NH 3-N of the pharmaceutical wastewater by ultrasonic increased at the beginning and then finally tended to be decreased.In regard to the removal rates of COD and NH 3-N,the best treatment time was 1000 s,the removal rates of COD and NH 3-N were 27.80% and 45.34%,separately.When ultrasonic radiation time was 1000 s,he removal rates of the COD and NH 3-N of the pharmaceutical wastewater by ultrasonic power increased at the beginning and then decreased.（2） The removal rates of COD and NH 3-N of the pharmaceutical wastewater by coagulation（0.1-0.6 g/L） increased at the beginning and then decreased.The best treatment was 0.3 g/L of PAC.The removal rates of COD was 40.10%,but the average removal rates of the NH 3-N is about 5%.（3） In the most condition,ultrasonic treatment then combined with coagulant was better than coagulant then combined with ultrasonic treatment,the removal rates of COD and NH 3-N were 61.2% and 58.6%,separately.Removal rates of COD and NH 3-N with ultrasonic treatment,then combined with coagulant was better than coagulation then combined with ultrasonic treatment.