摘要
采用空气导管强化复氧人工湿地处理农村污水时,改进其运行方式,可显著提高单级人工湿地脱氮效果。实验结果表明,改进型强化复氧人工湿地以高浸润线7 d和落空1 d采用延迟往复流的方式连续运行,每周期平均出水氨氮质量浓度可达GB 18918-2002一级B标准,TN去除率可提高至46%。氮去除负荷为3.27 g/(m2·d),脱氮能力比传统人工湿地提高近1倍,可达两级串联湿地脱氮水平。在同等脱氮效果下,可显著减少人工湿地占地面积。
An air pipe was introduced in constructed wetland for high-strengthen rural wastewater treatment. Enhanced nitrogen removal can be achieved in the system with modified operation mode. The results showed that average ammonia nitrogen concentration of effluent achieved the standard B of discharge standard of pollutants for municipal wastewater treatment plant in the modified constructed wetland with an extended tidal flow operation of 7 days high water level and 1 day low water level.＇ Average total nitrogen removal rate was significantly enhanced to 46% and the nitrogen removal load was achieved 3.27 g/（m2.d）. Nearly, doubling of nitrogen removal ability than conventional constructed wetland was achieved. Nitrogen removal effect of the enhanced oxygenation constructed wetland with an extended tidal flow operation was enhanced to the nitrogen removal effect of two series construcfed wetlands, saving the occupied lands.
出处
《水处理技术》
CAS
CSCD
北大核心
2014年第8期56-58,63,共4页
Technology of Water Treatment
关键词
人工湿地
脱氮
空气导管
延迟往复流
constructed wetland
nitrogen removal
air pipe
extended tidal flow
