Phytoremediation method, in combination with porous concrete and some additives, has been examined in order to reduce the contamination of unconventional water resources. This treatment system is economically cost-effective and easy to apply, compared to other treatment methods. The current study was focused on evaluating the effects of arrangement of vetiver grass and porous concrete specimens (four types of grass-specimens arrangements), vetiver grass layout on polystyrene sheets (5 × 5 and 10 × 10 cm spacing), porous concrete mixture (basic design as control, basic design + 5% zeolite, basic design + 10% zeolite, basic design + 5% pumice), temperature of the test room (10 ± 2, 20 ± 2 and 30 ± 2 °C), type of the unconventional water (domestic wastewater effluent and urban runoff) and Portland cement type (2 and 5) on the reduction of biochemical oxygen demand (BOD), chemical oxygen demand (COD), total suspended solids (TSS), and fecal coliforms. Taguchi method (robust design) and Qualitek-4 software were used to optimize the combination of aforementioned factors. Results indicated that temperature was the most effective parameter on reducing the BOD, COD, and fecal coliforms. The vetiver grass layout on the polystyrene sheets and porous concrete mixture design were more effective than vetiver grass-porous concrete arrangement. Effect of vetiver grass roots was significant in reducing the TSS content. The cement type had minimum impact on reducing the qualitative parameters of the wastewater samples. Based on the results, combination of 10 × 10 cm spacing of vetiver grass on polystyrene sheets, third type of vetiver grass-porous concrete arrangement, porous concrete mixture with 10% zeolite, Portland cement Type 2, and room temperature of 30 ± 2 °C was the best for improving the quality of wastewater effluent as compared to urban runoff. The treated effluents can be used with caution for urban green spaces or irrigation purposes, and the difficulties of the proposed combined system should be taken into consideration.

为了减少对非常规水资源的污染，已经研究了结合多孔混凝土和一些添加剂的植物修复方法。与其他处理方法相比，该处理系统在经济上具有成本效益并且易于应用。目前的研究集中在评估香根草和多孔混凝土标本的排列（四种类型的草标本排列），香根草在聚苯乙烯板上的布局（间距为5×5和10×10 cm），多孔混凝土混合物（作为控制的基本设计，基本设计+ 5％沸石，基本设计+ 10％沸石，基本设计+ 5％浮石，测试室的温度（10±2、20±2和30±2°C），非常规水的类型（家庭污水和城市径流）和生化需氧量（BOD），化学需氧量（COD），总悬浮固体（TSS）和粪大肠菌群减少的波特兰水泥类型（2和5） 。使用Taguchi方法（稳健设计）和Qualitek-4软件优化上述因素的组合。结果表明温度是降低BOD，COD和粪便大肠菌群最有效的参数。聚苯乙烯板上的香根草布局和多孔混凝土混合物设计比香根草-多孔混凝土布局更有效。香根草的根基对降低TSS含量具有显著作用。水泥类型对降低废水样品的定性参数影响最小。根据结果​​，香根草在聚苯乙烯板上的间距为10×10 cm，第三种香根草-多孔混凝土结构，含10％沸石的多孔混凝土混合物，波特兰水泥2型和室温30±2°C的最佳组合与城市径流相比，改善了废水的质量。处理后的废水可谨慎用于城市绿地或灌溉目的，应考虑拟议联合系统的困难。