摘要
Abstract
In response to the demand for urban polluted river treatment,a typical river section was selected to arrange a bio-aeration composite enhanced device based on a water ecological restoration project in a certain region.The spatiotemporal variation characteristics of dissolved oxygen(DO),permanganate index(CODMn),ammonia nitrogen(NH3-N)and total phosphorus(TP)in the water body under continuous and intermittent aeration modes were compared.The results showed that both aeration modes could increase the DO level in the water body,with an average increase of 14.4%;in terms of organic pollutant removal,the average removal rate of CODMn under intermittent aeration was 12.18%,with a better effect;for NH3-N removal,continuous aeration was more effective,with an average removal rate of 16.8%;in terms of TP removal,intermittent aeration presented higher efficiency,with an average removal rate of 45.1%;the purification effect was mainly concentrated within 30 m around the device.关键词
河道治理/曝气增氧/生物治理/连续曝气/间歇曝气Key words
river management/aeration and oxygenation/biological governance/continuous aeration/intermittent aeration分类
资源环境
