超声-生化法降解8-羟基喹啉废水的实验研究

本文采用超声-生化(两级好氧)联用的方法,对8-羟基喹啉废水的降解工艺进行了研究。对废水的预处理方法为超声降解法,文中分析了溶液初始浓度、超声时间、超声全程时间以及超声细胞粉碎机的变幅杆直径大小对废水预处理效果的影响。实验结果表明,变幅杆直径为25mm,溶液初始浓度为0.6g/L,超声全程时间在20min,最佳超声时间为2s时降解效率最高,CODcr去除率可以达到40.4%。本实验生化处理方法为普通活性污泥法(两级好氧),一级好氧反应池停留时间选择10h,去除率为69.4%;二级好氧反应池停留时间选择6h,去除率为71.7%。超声-生化(两级好氧)联用对8-羟基喹啉废水处理效果良好,CODcr总去除率达到94.4%。

Experiments of 8-hydroxyquinoline Wastewater Degradation by Ultrasound-biochemical Processes

This paper studied the degradation of 8-hydroxyquinoline wastewater adopting two stages of aerobic treatment by combining ultrasonic and biochemical processes. The ultrasonic degradation was adopted for wastewater pretreatment. The effects on pretreatment of the factors such as initial liquid concentration, the ultrasound time, the time lasted of the whole ultrasound process and the amplitude transformer diameter of ultrasonic cells crusher. The experimental results showed that the maximal degradation rate occurred at the conditions of 25 mm for transformer diameter, 0. 6 g/1 for the initial concentration, 20 minutes for ultrasound time and 2 seconds for the time lasted of the whole ultrasound process, of which the CODer removal rate reached 40. 4%. It used ordinary activated sludge （two stages of aerobic process） as biochemical treatment. For the primary and the secondary aerobic reactors the retention times were operated at 10 and 6 hours to obtained removal rates of 69. 4% and 71.7%, respectively. By adopting combination of ultrasonic and biochemical processes （two stages of aerobic treatment ） to treat 8-hydroxyquinoline wastcwater, a good result of CODcr removal rate up to 94. 4% was obtained.