串式垂直流湿地去除河水COD_(Mn)效果的模拟研究  

Simulating Study of COD_(Mn) Removal Efficiency in Series Type of Vertical Flow Constructed Wetlands Treating River Water

作　　者：周峻宇[1] 秦普丰[1] 卢少勇[2] 李济圣[2] 曲洁婷[2] 薛巍[2] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128 [2]中国环境科学研究院,环境基准与风险评估国家重点实验室,国家环境保护湖泊污染控制重点实验室,湖泊环境研究中心,湖泊工程技术中心,北京100012

出　　处：《农业环境科学学报》2013年第6期1226-1231,共6页Journal of Agro-Environment Science

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07101;2009ZX07106-005)

摘　　要：为揭示湿地对污染河水的去除效果,用温室内3级、2级、1级下行流人工湿地模拟系统去除北京清河河水中的化学需氧量(COD)。结果表明,有植物2级柱系统(水力负荷为0.2m3·m-2·d-1,水力停留时间为1.72d)的去除效果最佳,运行期CODMn的平均去除率为59.71%,平均出水浓度可达地表水Ⅱ类标准。串联级数对CODMn去除的影响较大,1级柱系统对CODMn去除率与多级柱系统间均呈显著差异(P<0.05),但多级柱系统间对CODMn去除率无显著差异(P>0.05)。植物对CODMn去除有显著影响,无-有植物各级对应系统间CODMn去除率均呈显著差异(P<0.05),运行期有植物各级柱系统及多级系统的沿程各柱均具更好的CODMn去除效果。综合考虑去除效果及构成成本,推荐有植物2级串联系统。In order to study the Chemical Oxygen Demand（CODMn） removal regularity in the wetland, indoor three stages, two stages and one stage downward flow simulated wetlands treating water of Qinghe River in Beijing were discussed. The results showed that the two stages planted system had the highest removal rate under the hydraulic load of 0.2 m^3·m^-2·d^-1, and hydraulic retention time of 1.72 d, the average removal rate in operation period was 59.71%, with the average effluent concentration below the value of grade-Ⅱ standard of surface water. The stages of series connection had a superior effect on CODMn removal, the one stage systems and the multistage systems had significant difference in the CODMn removal efficiency（P〈0.05）, but no obvious difference was observed for the multistage systems（P〉0.05）. The plants had a significant effect on CODMn removal, the unplanted-planted corresponding systems had significant difference in the CODMn removal efficiency（P〈0.05）, the planted systems and the column in flow pathway of multistage systems had a better CODMn removal efficiency in operation period. Considering the removal efficiency and the actual cost, we recommended the planted two stages series connection system.

关 键 词：串联 植物 垂直流人工湿地 CODMN 去除效果 

分 类 号：X522[环境科学与工程—环境工程]