摘要
由于传统水处理工艺不能满足微污染水源水中氨氮和有机质高效去除的要求，在组合填料生物滤池基础上，设置了超声辐射与无超声处理的生物滤池净化微污染水源水的对比实验，研究了超声波在最佳工况条件下对沸石一颗粒活性炭生物滤池预处理微污染水源水的强化作用。采用Box-Behnken响应面优化实验设计的影响因素（水温，水力停留时间、气水比），分别建立了NH^＋_4、CODMn、浊度去除率与上述因素之间的二次多项式模型，得到最佳工况条件：水温为20℃、水力停留时间为30min、气水比为0.5：1。研究结果显示，最佳条件下，对微污染水中NH^＋_4-N、CODMn浊度的去除率分别达到97.4％、87.1％、96.9％，出水水质好于缺少超声波强化作用的情况。还进一步分析了超声波促进生物活性的机理，以期为净水工艺提供新的思路。
As conventional water treatment processes are unable to effectively remove NH^＋_4-N, CODMn, and other organics in micro-polluted raw water, a study has been carried out to examine a combined process of ultrasonic and zeolite-GAC （granular activated carbon） filter for pre-treating micro-polluted source water. The influence of several factors including water temperature, hydraulic retention time （HRT） and air-to-water ratio was evaluated using an optimising experimental design based on Box-Behnken response surface method. Under the optimal conditions predicted by a quadratic model, i. e., water temperature 20℃, HRT 30 minutes, air-to-water ratio 0.5：1, the removal rates of NH^＋_4-N, CODMn and turbidity could be about 97.4%, 87.1% and 96.9%, respectively. The mechanism of biological activity enhancement by ultrasonic would be investigated in future so as to provide a novel approach to water treatment.
出处
《上海环境科学》
CAS
2014年第2期84-89,共6页
Shanghai Environmental Sciences
基金
甘肃省自然科学基金项目,编号:1010RJZA048
关键词
超声波
沸石-颗粒活性炭生物滤池
微污染水源水
预处理
Ultrasound Zeolite-granular activated carbon （GAC） biological filterMicro-polluted source water Pre-treatment
