好/厌氧多级串联潜流人工湿地对COD的去除效果  

Removal Efficiency of COD in Aerobic/anaerobic Subsurface Flow Constructed Wetlands

作　　者：李锋民[1] 宋妮[1] 单时[1] 王震宇[1] 

机构地区：[1]中国海洋大学环境科学与工程学院,山东青岛266100

出　　处：《环境科学与技术》2010年第S1期8-11,25,共5页Environmental Science & Technology

基　　金：国家水体污染控制与治理科技重大专项(2008ZX07010-008);教育部科学研究重大项目(308016);国家科技支撑项目(2006BAC01A13)

摘　　要：为了调整传统潜流湿地内部溶解氧分布状态,提高其对生活污水水质净化的效率,对传统潜流湿地进行了不同区段的划分及功能强化,设计了不同结构的好氧/厌氧多级串联潜流人工湿地,研究了好氧/厌氧段比例、位置及人工曝气等因素对出水COD的影响,并与传统潜流湿地进行净化效果的比较。结果表明,传统潜流湿地对COD的去除率为70.3%,以好氧/厌氧/好氧段方式串联采用前部和后部曝气并作厌氧处理的潜流湿地(即O-A-O强化曝气组)对COD的去除率为90.1%,比传统潜流湿地提高了19.8%;O-A-O强化曝气组平均出水浓度为17.4mg/L,不曝气的O-A-O出水COD浓度基本维持在50.0～60.0mg/L;对O-A-O前部和后部曝气处理后COD的去除率分别提高了30.4%和20.8%。可见,在实验条件下O-A-O强化曝气组对COD的去除率最高,结构相同的湿地曝气处理后出水水质有显著改善,在湿地前部曝气对COD的去除效果尤为显著。In order to adjust the dissolved oxygen in the traditional subsurface flow constructed wetlands(SFCWs) and increase the purification efficiency of sewage water,the traditional SFCWs were divided into different sections with enhanced functions. Different kinds of aerobic/anaerobic SFCWs were designed to study the influence of ratio and location of aerobic/anaerobic,artificial aeration and other factors on the COD in effluent. The purification efficiency of the water in this study was compared with that in traditional SFCWs. The results show that the removal efficiency of COD in traditional SFCWs was 70.3% but 90.1% in aerobic/anaerobic/aerobic SFCWs with aeration(O-A-O SFCWs with aeration) treatment. Aeration in the front and in the rear,and anaerobic treatment in the middle was used in this treatment. COD concentration in the effluent of O-A-O SFCWs with aeration treatment was 17.4mg/L,while that of O-A-O SFCWs without aeration was at 50.0～60.0 mg/L. The removal efficiencies of COD in new SFCWs with aeration in the front and in the rear were increased by 30.4% and 20.8%. In the experimental conditions,O-A-O SFCWs with aeration had the highest removal efficiency of COD,and the water quality of the same structure SFCWs had significant improvement after aeration. In addition,SFCWs with aeration in the front could increase removal rate of COD remarkablely.

关 键 词：曝气 溶解氧 好氧/厌氧串联 COD 去除率 

分 类 号：X703[环境科学与工程—环境工程]