摘要
针对目前人工湿地运行中的水流分布不均、易堵塞、溶解氧不足导致NH4+-N硝化不充分及除磷率低下等问题,研究了作为复合人工湿地系统组成要素的高负荷水解酸化池、自然复氧/沉淀一体化装置、强化除磷脱氮槽等强化处理单元的运行特性及对全系统处理效果的影响.结果表明,高负荷水解酸化池对COD、SS有较强的去除作用,分别占系统总去除率的38.05%和34.82%;一体化装置对SS的去除占系统总去除率的22.01%,并使DO提高到2.5 mg·L-1以上;经两段强化除磷脱氮槽的强化处理,TP综合去除率提高8%以上,并使湿地出水各类污染物全面达到GB 18918-2002一级A标准.
There are some defects in constructed wetland,including the uneven distribution of flow,easily blocked,lack of oxygen supply systems and the unsatisfactory phosphorus adsorption capacity of the substrates,etc.The research mainly studied the function and contribution of the pool of hydrolysis acidification,the natural reoxygenation/sinking device and strengthen slot for reducing nitrogen and phosphorus.The results showed the removal efficiency of COD and SS in hydrolysis-acidification pool accounted for 38.05% and 34.82% of the total removal efficiency of system.The SS removal efficiency of the natural reoxygenation/sinking device accounted for 22.01% of the total removal efficiency of system,and the concentration of DO kept above 2.5mg·L-1.The two strengthen slots can ensure the TP,TN,COD up to the standard of the level 1 of GB 18918-2002.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2013年第2期570-575,共6页
Environmental Science
基金
国家自然科学基金项目(51079029
50909019)
南京市科技计划项目(20100274)
关键词
复合人工湿地
水解酸化池
自然复氧
强化处理单元
运行特性
composite constructed wetland
the pool of hydrolysis acidification
natural reoxygenation
the strengthening units
operating performance
