摘要
为解决有机碳不足抑制反硝化反应造成的脱氮效率低下的问题,向人工湿地系统中添加富含有机质的植物材料作为反硝化所需的有机碳源,根据玉米秸秆、稻壳、木屑及芦苇竿4种植物材料有机物释放规律及植物体分解对水质的潜在影响情况,确定芦苇竿为较适宜的植物碳源。采用垂直流人工湿地单元模型研究了补充芦苇竿对人工湿地脱氮效果的影响,初步确定了试验条件下芦苇竿的适宜添加量范围为0.47-1.09 kg/m^2。硝态氮的沿程变化规律表明,芦苇竿释放出的有机物提供了反硝化所需的有机碳,提高了人工湿地的脱氮效果。
To solve the problem of low nitrogen removal efficiency due to the shortage of organic carbon, plant materials rich in organic matter were added as an alternative carbon source to the wetland system. According to the release characteristics of organic matter and the potential influence on water quality caused by tissue decomposition, reed was chosen as an available plant carbon source instead of corn straw, rice husk and wood chips. Vertical-flow constructed wetland microcosms were used to investigate the improvement of nitrogen removal efficiency by supplying the reed to the units. The appropriate supplement amount range of reed was 0. 47 - 1.09 kg/m^2 under experimental conditions. The variation of nitrate-N concentration along the distance implies that the organic matter released from reed is a kind of available organic carbon source for denitrification and improves nitrogen removal efficiency of the constructed wetland.
出处
《解放军理工大学学报（自然科学版）》
EI
北大核心
2009年第6期644-649,共6页
Journal of PLA University of Science and Technology(Natural Science Edition)
基金
江苏省自然科学基金资助项目(2006710)
关键词
人工湿地
脱氮
碳源
植物材料
反硝化
constructed wetland
nitrogen removal
carbon source
plant material
denitrification
