地下水过滤器中的生物硝化作用通常会受到地下水中除铁过程的抑制 同样的过滤器。在全尺寸过滤器中，通过使用 地下曝气，这可能会改变除铁机制和 由此产生的过滤涂层。几个地下水过滤器，有地下曝气和无地下曝气， 对过滤材料涂层的质量和孔结构进行了比较。 饮用水过滤器中过滤涂层的累积孔隙面积由以下公式确定: 汞侵入孔隙测定法。 研究结果与生物硝化有关 标准批量测试中的活动。在非地下曝气滤池样品中 累积孔隙面积受到限制，与特定硝化作用成反比 速度然而，在地下曝气过滤器中，涂层质量的大幅增加导致 高累积孔隙面积，但比硝化速率略有降低。包括9个参考文献、表格、图表。

Biological nitrification in groundwater filters is often inhibited by iron removal processes in the same filters. Nitrification can be successfully maintained in full-scale filters by use of subsurface aeration, which probably changes the iron removal mechanism and the resulting filter coatings. Several groundwater filters, with and without subsurface aeration, have been compared for mass and pore structure of the coatings on the filter materials. Cumulative pore area of filter coatings in drinking water filters has been determined by mercury-intrusion porosimetry. The results have been related to biological nitrifying activity in a standard batch test. In the non-subsurface aerated filter samples, both mass and cumulative pore area were restricted and inversely proportional to specific nitrification rate. In subsurface aerated filters, however, a strong increase in coating mass resulted in high cumulative pore area, but only a slight reduction in specific nitrification rate. Includes 9 references, tables, figures.