摘要
研究了潜流式人工湿地内部不同填料层和沿水流方向硝化能力的变化 .结果表明 :潜流式人工湿地中 ,硝化能力沿水流方向逐渐减小 .底部填料层 ,即炉渣层的氨氧化速率常数和亚硝酸氧化速率常数分别为 1 99～6 89mg·(h·kg) - 1和 1 4 4～ 5 2 2mg(h·kg) - 1,而床体上部土壤层的氨氧化速率常数和亚硝酸氧化速率常数分别为 0 5 3～ 0 89mg·(h·kg) - 1和 0 96～ 1 3 9mg·(h·kg) - 1.因此炉渣层的硝化能力要明显高于土壤层 。
The nitrification ability of different layers in a subsurface constructed wetland treating sewage was measured . The experiment results showed that the ability of nitrification was decreased along the direction of water flow in the subsurface wetland.The constants of ammonia oxidation rate and nitrite oxidation rate in the slag layer on the botton were 1.99～6.89mg·(h·kg) -1 and 1.14～5.22mg·(h·kg) -1 respectively,but in the soil layer on the top were 0.53～0.89mg·(h·kg) -1 and 0.96～1.39mg·(h·kg) -1 respectively.So the ability of nitrification in the layer of slag was better than the layer of soil obviously,and it showed that the nitrification was mainly happened in the slag layer.
出处
《环境科学》
EI
CAS
CSCD
北大核心
2003年第1期80-83,共4页
Environmental Science
基金
国家科技部重大专项 ( 2 0 0 0 0 3 )
