生物过滤系统中多级混合颗粒群渗流过程分析与完善  

Analysis and Improvement of Mixed Particle Swarm Percolation Process in Biofiltration System

作　　者：王亚军[1,2] 

机构地区：[1]兰州理工大学土木工程学院,甘肃兰州730050 [2]东南大学土木工程学院,江苏南京210096

出　　处：《水土保持通报》2017年第3期329-333,共5页Bulletin of Soil and Water Conservation

基　　金："十二五"国家科技支撑计划重大项目"长三角快速城镇化地区美丽乡村建设关键技术综合示范"(2015BAL02B05);江苏省重大科技专项课题(BE2015356-2);江苏高校优势学科建设工程资助项目(CE02-1-1);甘肃省高等学校科研项目(2016B-026)

摘　　要：[目的]准确掌握过滤渗流场的变化规律,为更深刻理解生物过滤系统中流态的变化提供理论参考。[方法]利用颗粒群加压膨胀理论,基于对流固耦合效应和渗流特性进行研究。[结果]提出了生物过滤系统渗流过程的4阶段假设,并通过试验验证了变化规律。[结论]无论在清水和污水渗流过程中都出现的渗透系数由下降到上升再下降变化趋势,是由于颗粒群加压膨胀产生的原因。[Objective] To accurately master the variation law of the filtration flow field, and to provide a theoretical reference for the deeper understanding of the change in the flow in the biofiltration system.[Methods] Based on the particle swarm pressure expansion theory, characteristics of the infiltration were studied mainly in consideration of the fluid-solid coupling effect.[Results] A four stage hypothesis in the percolation process of the biofiltration system was put forward and verified by the experiment.[Conclusion] Either for the process of water seepage or sewage seepage, the permeability coefficients changed from falling to rising and then decreasing, which is caused by the particle swarm pressure expansion.

关 键 词：生态过滤系统 渗流过程 流固耦合 饱和渗流 渗透系数 

分 类 号：X502[环境科学与工程—环境工程]