浸没一体式膜生物反应器中PVDF平板膜运行特性研究
毕业论文关键词：MBR膜生物反应器；沉淀池；临界通量
The research about operation characteristics of PFVD flat membrane in submerged membrane bioreactor
Abstract: The main purpose of this paper is to study the factors that influence the critical flux of flat membrane. The membrane bio-reactor is a new sewage treatment device which combines microfiltration membrane separation technology and ultrafiltration membrane separation technology. The rector has both advantages of membrane treatment technology and Biological treatment technology, which use microfiltration membrane and ultrafiltration membrane as slurry separation unit, can replace sedimentation tank completely. The purpose of the topic is to study the factors that influence the critical flux of flat membrane through the contrast of different kinds of flat membrane under different circumstances, analyzing the influence factors should be noticed in the operation of membrane bioreactor in engineering application. This topic studied the influence of aeration intensity/sludge concentration/the distance from the aeration tube to the bottom of the membrane/temperature/oil pollutants/ the soaking time of sodium hypochlorite on critical flux of flat membrane. The results show that oil pollutants is the most powerful influence to the operation of membrane bioreactor, then comes the sludge concentration. The influence of temperature on critical flux of flat membrane is unclear since the lack of experimental data. Aeration intensity and the distance from the aeration tube to the bottom of the membrane have no obvious influence on PFVD flat membrane.
Keywords: membrane bioreactor; sedimentation tank; critical flux
目录
1 引言 5
1.1 课题意义及目的 5
1.2 国内外发展状况及动态 5
1.3 课题指导思想 6
1.4 主要研究内容 6
2 MBR膜生物反应器的相关理论 7
2.1 MBR膜生物反应器的原理、膜组件的特性及相关工艺 7
2.1.1 MBR膜生物反应器的原理 7
2.1.2 MBR膜生物反应器的核心工艺原理 8
2.1.3 MBR膜生物反应器的几种主要工艺类型 9
2.1.4 MBR膜生物反应器中悬浮物的去除及有机物可生化性的分析 10
2.2 MBR膜生物反应器中膜组件的特性 12
2.2.1 工程应用中的平板膜组件构成及特点 12
2.2.2 平板膜与中空纤文膜的对比 13
2.3 临界通量 16
2.4 临界通量的测试方法和参数确定 16
2.4.1 临界通量的测试方法 16
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