人工湿地植物和填料的作用与选择

The Functions and Selection of Constructed Wetland Plants and Media

人工湿地中的植物不但直接摄取利用污水中的营养物质,吸收富集污水中的重金属等有害物质,而且为根区的微生物输送氧并提供栖息地,加强和维持湿地系统的稳定性。填料是人工湿地的基质与载体,它支撑着人工湿地动植物与徽生物的生命过程,填料对污染物的成功截留不仅为后续植物吸收创造良好条件,而且是出水水质的重要保证。因此不同类型植物的搭配栽种和不同性质的填料搭配使用是人工湿地必需考虑的重要因素。

Plants in constructed wetland play important roles, not only assimilating and utilizing the nutrients in sludge, and absorbing and enriching pollutnats and heavy metals, but also transmitting oxygen to the constructed wetland system, providing habitat for microorganisms, maintaining the stability of system and aecumulating organic substances. Media is the medium and arrier of the constructod wetlands, which supports the life coupe of plants and microorganisms in constructed wedands. The successful removal of pollutant by media creates a good term for follow- up adsorptio by plant and guanmtees the quality of diluent. So it is important that the different sorts of plants should be planted suited with different media, to improve the removal of nitrogen and phosphor in coustructed wetlands.