曝气对两种人工湿地污水净化效果的影响  

Effects of aeration on sewage purification in two kinds of constructed wetlands

作　　者：马剑敏[1,2] 张永静[1] 马顷[1] 王程丽[1] 苏秀燕[1] 马帅[1] 靳同霞[1] 

机构地区：[1]河南师范大学生命科学学院,新乡453007 [2]河南省环境污染控制重点实验室,新乡453007

出　　处：《环境工程学报》2011年第2期315-321,共7页Chinese Journal of Environmental Engineering

基　　金：河南省教育厅科技攻关计划(2009A180010);河南省科技攻关计划(0624440039);新乡市科技攻关计划(08S045)

摘　　要：采用复合垂直流和水平潜流2种人工湿地处理混合污水,研究了在气水比(曝气体积/湿地进水体积)为2、4、6、8和10时2种人工湿地对污水的净化效果。结果显示:(1)复合垂直流人工湿地以气水比为2进行曝气时,对污水的净化效果最好,上行池出水的COD、TN、NH4+-N、NO3--N平均去除率比不曝气时分别提高了16.47%、5.15%、13.84%、96.91%;气水比为6时对COD去除效果比2稍好,在处理更高负荷污水时可采用此气水比进行曝气。曝气对TP的去除率影响不明显。(2)曝气对水平潜流人工湿地的COD去除率较不曝气时有显著提高,气水比为6时效果最好,增加30%;TN、NH4+-N平均去除率在气水比为2时较对照无明显改变,NO3--N去除率有大幅提高;气水比继续增大时,脱氮效果有不同程度的降低;对TP的去除率无显著影响。In the study,the effects of aeration on combined sewage in integrated vertical-flow and horizontal subsurface-flow constructed wetlands were researched when the air-water ratio（the ratio of aeration volume and influent volume） was 2,4,6,8 and 10,respectively.The results showed that using the air-water ratio of 2 to do aeration experiment in integrated vertical-flow constructed wetland could get the best effects of sewage purification.The average removal rate of chemical oxygen demand（COD）,total nitrogen（TN）,ammonia nitrogen（NH＋4-N） and nitrate nitrogen（NO-3-N） of the effluence of up-flow pond respectively increased 16.47%,5.15%,13.84% and 96.91% than non-aerated experiment.The results indicated that the effect of removal COD at the air-water ratio of 6 was better than 2.In dealing with domestic higher load could use this air-water ratio to aerate.In horizontal subsurface-flow constructed wetland,aeration could make the treating effect of COD improve more obviously than non-aerated experiment,especially when air-water ratio was 6 the increase could be up to 30%.The average removal rate of TN and NH＋4-N was not obviously changed when the air-water ratio was 2,and there was a substantial increase in the removal rate of NO-3-N.When air-water ratio continued to increase,nitrogen removal had varying degrees of reduction.In the two kinds of constructed wetlands,the removal rate of total phosphorus was no significantly changed under the two conditions of aeration and non-aeration.

关 键 词：人工湿地 气水比 曝气 污水净化 

分 类 号：X703[环境科学与工程—环境工程]