侧向流曝气生物滤除磷研究.doc

摘要 生物滤池工艺作为生物接触氧化工艺与给水过滤工艺有机结合的一项新的污水深度处理术，近十几年来发展迅速，它将成为人们控制水污染和解决污水回用问题的主要手段之一。水资源的污染和短缺使得废水的深度处理及回用己是一个必然的趋势。曝气生物滤池具有占地资源少，处理效率高的特点。与此同时也存在着运行过程中易堵塞，除磷效率不高的问题。为了解决以上的难题，本课题采用一种新型的曝气生物滤池——侧向流曝气生物滤池，它采用全新的上下曝气侧向引入污水的创新技术，减少了反应器的堵塞。本试验课题重点研究了常温下反应器的启动和启动后除磷和COD时各参数的影响。 本次试验采用重庆大学B区学生宿舍的生活污水作为反应器的进水。进水COD为200～600mg/l, pH为6.8～7.8mg /L, 氨氮浓度为80～120 mg /L，总磷浓度为2～5mg /L。课题侧重研究了在不同的水力负荷、不同的气水比、不同的曝气比情况下的污染物的去除效率。 试验表明，侧向流曝气生物滤池确实减少了反应器的堵塞问题。并且他对COD有良好的去除效果，抗击负荷能力也很强。但是除磷的效果不强的问题没有得到很好的改善。 关键词：污水，侧向流曝气生物滤，除磷； ABSTRACT The pollution and shortage of the water resource makes the necessary of the advanced treatment and the reuse of the wastewater. Biological Aerated Filter( BAF )process, a new technology that combines Biological Contact Oxidation and supply filtration, will be one of the important methods to solve above problems. BAF have a lot of advantages .Such as less land in use and high treatment efficiency. However, it is still with some problems such as easily being blocked and low phosphorus removal efficiency in operation. To solve these problems, a new kind of BAF, namely the Lateral Biological Aerated Filter (LBAF), is developed and studied in this paper, that air is came into BAF from middle and wastwate was gave into from the bottom of LBAF.This new technology is very creative to reduce the blocking of LBAF. The paper includes start-up of the filter under condition of natural temperature and performance of the filter treating municipal sewage under condition of natural temperature, and the effects of the parameters correlated to the filter. The wastewater we used in the experiment was come from students’ dormitory in Distract B of Chongqing University. The inflow COD, PH ,NH3-N and TP are 200～600mg/l,6.8～7.8mg /L, 2～5mg /L. This study focus on research topics of the removal efficiency in different hydraulic load, a different rate of gas and water, different rate of aeration. Tests have shown that lateral flow Biological Aerated Filter inde