In an attempt to improve the quality of the agricultural drain in Egypt for its reuse again in the irrigation, low-cost solution such as sand filter along with/without other filtration media has been used in this research. As a result of that, pilot plant of sand filter mixed with other filtration media was tested for its ability to improve the sand performance in removing the suspended solids and organic matters from agricultural drain water of the Belbeis drain (in Sharkia governorate in Egypt). Sand only, sand mixed with sponge, sand mixed with activated carbon and sand mixed with ceramic cylinders have been tested to find the best media combination and optimum mixing sand/ medium ratio and optimum infiltration rate. The work has been done on four runs. It was found that sand mixed with ceramic cylinders gave the best removal efficiency with respect to total chemical oxygen demand and chemical oxygen demand for solution which were 77, 74%, respectively, whereas sand mixed with sponge had the best removal efficiency with respect to total suspended solids which was 89%. Also, all tested media combination had effluent quality that complied with Egyptian law 48 for the year 1982 regarding the disposal of wastewater into agricultural drains (chemical oxygen demand ≤ 80 mg/l, total suspended solids ≤ 50 mg/l).

为了提高埃及的农业排水系统的质量，以使其再次用于灌溉，本研究使用了低成本解决方案，例如砂滤器以及/不使用其他过滤介质。结果，测试了与其他过滤介质混合的沙滤器中试装置在从Belbeis排水渠（位于埃及的Sharkia省）的农业排水中去除悬浮固体和有机物的能力，从而提高了沙土性能。已测试仅砂，与海绵混合的砂，与活性炭混合的砂以及与陶瓷圆筒混合的砂，以找到最佳的介质组合，最佳的混合砂/介质比和最佳的渗透率。这项工作已经进行了四次。结果发现，与陶瓷圆柱体混合的砂在溶液中的总化学需氧量和化学需氧量方面的去除效率最高，分别为77％和74％，而与海绵混合的砂在总化学需氧量方面的去除效率最高。悬浮固体含量为89％。另外，所有测试的介质组合物的废水质量均符合1982年埃及法律48关于将废水排入农业排水沟的要求（化学需氧量≤80 mg / l，总悬浮固体≤50 mg / l）。