Rapid small-scale column tests (RSSCTs) have been previously used to predict the effluent concentration of a single nutrient in large filters with good accuracy. However, in drainage waters originating from heavy textured soils, where there is a need for in-ditch filters to retain both dissolved reactive phosphorus (DRP) and ammonium (NH₄) simultaneously, the suitability of a RSSCT approach to model both parameters must be proved. In this study, a decision support tool was used to identify appropriate media that may be placed in filters for the removal of DRP and NH₄. The selected media for this study were sand and zeolite. Both media were placed in acrylic tubes each with an internal diameter of 0.01 m and with lengths ranging from 0.1 to 0.4 m, and their performance for simultaneous removal of DRP and NH₄ (1 mg DRP and NH₄-N L⁻¹) from water was evaluated. The data generated from the RSSCTs were used to model DRP and NH₄ removals in 0.4 m-long laboratory columns of internal diameter 0.1 m, which had the same media configuration as the small columns and were operated using the same influent concentrations. The developed model successfully predicted the effluent concentration of both the DRP and NH₄-N from the large columns. This indicates using RSSCTs to model the performance of filters will produce substantial savings in operational, financial and labour costs, without affecting the accuracy of model predictions.

以前，快速小型色谱柱试验（RSSCT）曾被用来以良好的准确性预测大型过滤器中单一营养物的流出物浓度。但是，在源自稠密带纹理土壤的排水中，需要沟内过滤器同时保留溶解的反应性磷（DRP）和铵（NH ₄），必须采用RSSCT方法对两个参数进行建模证实。在这项研究中，使用了决策支持工具来确定可以放入过滤器中的适当介质，以去除DRP和NH ₄。本研究选择的介质是沙子和沸石。两种介质均置于内径为0.01 m，长度为0.1至0.4 m的丙烯酸管中，并具有从水中同时去除DRP和NH ₄（1 mg DRP和NH ₄ -NL ^-1）的性能。被评估。从RSSCT生成的数据用于模拟内径为0.1 m的0.4 m长的实验室色谱柱中DRP和NH ₄的去除，该色谱柱具有与小型色谱柱相同的介质配置，并且使用相同的进水浓度进行操作。开发的模型成功预测了DRP和NH ₄的废水浓度-N来自大列。这表明使用RSSCT对过滤器的性能进行建模将在不影响模型预测准确性的情况下，节省大量的运营，财务和人工成本。