强化曝气对潜流人工湿地堵塞物分布规律的影响  

The effect of aeration on accumulation of solids in subsurface flow constructed wetlands

作　　者：白少元[1,2] 李雪芬[1] 丁彦礼[2] 许健[1] 解庆林[1,2] 游俊杰[1] 

机构地区：[1]桂林理工大学,广西环境污染控制理论与技术重点实验室,桂林541004 [2]桂林理工大学,广西岩溶地区水污染控制与用水安全保障协同创新中心,桂林541004

出　　处：《环境科学学报》2016年第5期1717-1722,共6页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金((No.51408147;41404116));广西自然科学基金(No.2014GXNSFBA118234);广西科技三项(桂科合1599005-2-2);广西矿冶与环境科学实验中心;广西高等学校高水平创新团队及卓越学者计划项目~~

摘　　要：构建曝气及未曝气潜流人工湿地小试实验系统,研究曝气对人工湿地堵塞物组分及分布规律的影响.结果表明:两系统中堵塞物组成均以无机物为主,曝气对堵塞物累积总量影响不大,但对堵塞物化学组分影响较大,使堵塞物中有机物组分比例降低.未曝气及曝气系统堵塞物平均累积量分别为5.18 mg·g^(-1)及5.21 mg·g^(-1),有机物所占比例分别为28.4%和15.6%.曝气对堵塞物在水平及深度方向的分布影响不大,两系统均表现为底层累积物含量略高于表层,出水端累积物含量略高于进水端.电镜及能谱分析结果显示,受溶解氧因素的影响,两系统中表层填料元素种类均较底层丰富,且曝气系统较未曝气系统丰富.In order to investigate the effect of artificial aeration on the composition and distribution of solids in the subsurface flow constructed wetlands （HSCWs） , two parallel HSCWs with and without aeration were built at lab-scale. The results indicate that the inorganic matter accumulation mainly occurred in both wetlands. Aeration did not significantly affect the total suspended solids （TSS） , and they were 5.18 mg＂ g-l（ without aeration） and 5.21 mg.g-m（ aeration）, respectively. However, aeration had a direct impact on the proportion of organic contents in the TSS, which was 28.4% in CWs without aeration as compared to 15.6% in the aerated CWs. There was no strong correlation between aeration and particulate solids distribution, and the TSS in the outlet side and bottom layer were higher than that in the inlet side and surface layer for the two CWs. The results of Scanning Electron Microscopy （SEM） and energy dispersive X-ray analyses show that aeration improved the element species significantly, and more different types of element species were found in surface filler than those in bottom layer of both CWs.

关 键 词：曝气 人工湿地 堵塞 累积物 

分 类 号：X703[环境科学与工程—环境工程]