阶段曝气和植物对人工湿地处理城镇污水厂尾水的影响  

Effect of intermittent aeration and plants on the treatment of tail water of municipal wastewater treatment plant by constructed wetlands

作　　者：江林[1] 刘润龙 陈培[1] 朱丹[1] 陈君杨[1] 冯景伟[1] 张继彪[2] 

机构地区：[1]合肥工业大学土木与水利工程学院,合肥230009 [2]复旦大学环境科学与工程系,上海200433

出　　处：《环境工程学报》2016年第9期4761-4767,共7页Chinese Journal of Environmental Engineering

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07103-004);苏州市环保局项目(C201103)

摘　　要：采用人工配水模拟城镇污水处理厂尾水水质,利用3套阶段曝气垂直潜流人工湿地（VSFCW）对其进行处理。结果表明：当水力负荷分别为30、90和180 cm·d-1时,3套人工湿地对COD具有较好的去除效果,其去除率都大于66.7%;在处理总磷（TP）和总氮（TN）方面,VSFCW-1（无植物-曝气垂直潜流人工湿地）去除效果远远低于VSFCW-2（芦苇-曝气垂直潜流人工湿地）和VSFCW-3（芦苇-不曝气垂直潜流人工湿地）,VSFCW-2（芦苇-曝气垂直潜流人工湿地）和VSFCW-3（芦苇-不曝气垂直潜流人工湿地）对TP和TN的去除率分别在80.0%和75.0%以上且具有较强的抗水力负荷冲击能力。VSFCW-2（芦苇-曝气垂直潜流人工湿地）和VSFCW-3（芦苇-不曝气垂直潜流人工湿地）对COD、TP的去除主要是集中在沿程的前1/4段（0～24 cm）,后3/4段（24～115 cm）保证了出水水质的稳定。Synthetic wastewater, simulating the water quality of the tailwater of a municipal wastewater treatment plant, was treated with three types of vertical subsurface flow constructed wetlands （VSFCW）, with in- termittent aeration. The experiment results indicated that when the hydraulic loading rate （HLR） was 30, 90, and 180 cm · d-1, the observed removal effect of COD was satisfactory, with removal rates of more than 66.7%. As regards the removal of TP and TN, the removal efficiency of VSFCW-1 （no plants-aeration vertical subsurface flow constructed wetlands） was much lower than those of VSFCW-2 （Phragmites australis-aeration vertical sub- surface flow constructed wetlands） and VSFCW-3 （Phragmites australis-no aeration vertical subsurface flow con- structed wetlands）. When using VSFCW-2 and VSFCW-3, the removal rates of TP and TN were more than 80. 0% and 75.0% , respectively, and could resist fluctuation of the loading. The removal of TP and TN when u- sing VSFCW-2 and VSFCW-3 was mainly focused on the front quarter section （0 to 24 cm） along the wetland length. The last three-quarter section （24 to 115 cm） along the wetland ensured the water quality of the effluent.

关 键 词：阶段曝气 植物 垂直潜流人工湿地 尾水 

分 类 号：X703[环境科学与工程—环境工程]