中文摘要：

介绍了污水中微粒的分类、尺寸分布（PSD）和检测PSD的方法。PSD与污水化学成分相关,不同来源的污水PSD各不相同,且PSD会随着污水处理流程变化。PSD可对污水进行表征,对传统方法进行辅助和补充。在生物处理中,微粒尺寸与BOD降解速率呈反比例关系,PSD可提供COD组分迁移变化的必要信息,直接影响着生物处理的效果。无论是对传统活性污泥法还是对生物膜法中的PSD进行研究,均可评估生物处理中碳源是否足够,分析去除机理,优化处理效果。PSD对痕量物质的去除和迁移具有重要意义,在深度过滤中,污水中PSD呈幂函数关系,PSD可研究雌激素等痕量物质的去除机理。PSD作为一个新型的研究工具,可以进一步深入应用于污水处理领域,对该领域的研究和技术升级具有重要意义。

英文摘要：

Particle species,particle size distribution（PSD）in sewage and method for characterizing PSD were introduced.PSD is associated with chemical composition,which for different wastewater have different characteristics and varies in treatment process.PSD is used to interpret wastewater characteristics,assess appropriate treatment technologies and estimate expected removal performance.PSD provides essential information on the fate of COD fractions subjected to biological treatment.It could estimate whether the carbon source is adequate or not and could be used to study removal mechanism and optimize the treatment effect in biological treatment.Colloidal material has been implicated to play a crucial role as an intermediary for behavior and fate of trace materials in environmental and biogeochemical process.In deep filtration,PSD in wastewater effluents relates to power law function.Mechanism for removing trace materials such as estrogen could be studied by PSD.As a new studying tool,PSD is appropriate to be applied in wastewater treatment,which is of significance to the mechanism research and upgrade of technology.