1 前言 接触氧化法是目前地下水除铁最常用的技术。通常所用滤料为锰砂、石英砂或无烟煤等硬质滤料,运行经验成熟,处理效果好,但是存在着滤速低、反冲洗不易控制等问题。软纤维(丙纶长丝)滤料则克服了上述缺点,其中滤速可提高约1.5倍,反冲洗易于控制、处理效果好,其 1 Introduction Contact oxidation is currently the most commonly used technique for removing iron from groundwater. The filter materials usually used are manganese sand, quartz sand or anthracite hard filter materials. The operation experience is mature and the treatment effect is good. However, there are problems such as low filtration speed and difficult backwash control. The soft fiber (polypropylene filament) filter material overcomes the above drawbacks, in which the filtration rate can be increased by about 1.5 times, and the backwashing is easy to control and the treatment effect is good.