超声波协同混凝剂投加技术处理生活污水  

Treatment of domestic sewage by ultrasound-coagulant synergy method

作　　者：宋诗稳[1] 刘冉彤 王倩[1] 王天孝 汪晓珊 

机构地区：[1]延安大学石油工程与环境工程学院,陕西延安716000

出　　处：《陕西科技大学学报》2018年第1期85-89,共5页Journal of Shaanxi University of Science & Technology

基　　金：陕西省教育厅专项科研计划项目(16JK1865);国家级大学生创新创业训练计划项目(201610719021)

摘　　要：利用超声的空化效应、超声机械振动效应及自由基效应,以增大污水中有机物的比表面积、加快热运动,使有机组分与混凝剂充分碰撞,从而提高共沉淀速率,实现超声波协同药剂投加技术处理生活污水.本文探讨了超声波处理时间、污水pH、混凝剂种类及投加量对污水处理效果的影响.实验表明:采用超声波协同混凝剂投加处理生活污水,在超声波处理时间为800s、聚合氯化铝投加量为0.4g/L、污水pH为7.0的条件下,先用超声波处理后投加聚合氯化铝对COD、NH+4-N的处理效果最佳,去除率分别为72.46%、59.95%,在最佳实验条件下,本法对总磷和悬浮物也有一定的去除效果.In this study,the ultrasound-coagulant synergy method was used in improving the synergetic treatment efficiency of organic pollutants in wastewater.With the cavitation effect,mechanical vibration effect and free radical effect of ultrasound,the specific surface area of organic matters in sewage was increased,the thermal movement was speed up,and the unit and the coagulant were fully collided to improve the co precipitation rate.The effects of ultrasonic time,sewage pH,coagulant type and dosage on the treatment efficiency of sewage COD and NH+4-N were discussed.The results show that,the ultrasonic treatment time is 800 s,the dosage of polyaluminium chloride is 0.4 g/L,sewage pH is 7.0,and ultrasonic is used after the treatment of polyaluminium chloride,the ultrasound-coagulant synergy method achieve the best treatment effect,the removal efficiency of COD and NH+4-N are 72.46% and 59.95%,respectively.Under the optimum conditions,this method also has effect on total phosphorus and suspended solids.

关 键 词：超声波 混凝剂 生活污水 COD NH+4-N 

分 类 号：O657.1[理学—分析化学]