National National Center for Studies and Research on Water and Energy (CNEREE), Cadi Ayyad University, P.O.Box 511, Marrakech 40000, Morocco; Laboratory of Water, Biodiversity and Climate Change (EauBiodiCc), Faculty of Sciences Semlalia, University Cadi Ayyad, P.O.Box 2390, Marrakech 40000, Morocco.
National National Center for Studies and Research on Water and Energy (CNEREE), Cadi Ayyad University, P.O.Box 511, Marrakech 40000, Morocco; Geology and Sustainable Mining Institute, Mohammed VI Polytechnic University, Ben Guerir 43150, Morocco.
Water Sci Technol. 2024 May;89(10):2685-2702. doi: 10.2166/wst.2024.124. Epub 2024 Apr 16.
This paper evaluates the performance and potential of a full-scale hybrid multi-soil-layering (MSL) system for the treatment of domestic wastewater for landscape irrigation reuse. The system integrates a solar septic tank and sequential vertical flow MSL and horizontal flow MSL components with alternating layers of gravel and soil-based material. It operates at a hydraulic loading rate of 250 L/m/day. Results show significant removal of pollutants and pathogens, including total suspended solids (TSS) (97%), chemical oxygen demand (COD) (88.57%), total phosphorus (TP) (79.93%), and total nitrogen (TN) (88.49%), along with significant reductions in fecal bacteria indicators (4.21 log for fecal coliforms and 3.90 log for fecal streptococci) and the pathogen sp. (2.43 log). The principal component analysis confirms the effectiveness of the system in reducing the concentrations of NH, COD, TP, PO, fecal coliforms, fecal streptococci, and fecal staphylococci, thus supporting the reliability of the study. This work highlights the promising potential of the hybrid MSL technology for the treatment of domestic wastewater, especially in arid regions such as North Africa and the Middle East, to support efforts to protect the environment and facilitate the reuse of wastewater for landscape irrigation and agriculture.
本文评估了全规模混合多层土壤滤床（MSL）系统处理生活污水用于景观灌溉再利用的性能和潜力。该系统集成了太阳能化粪池和顺序垂直流 MSL 和水平流 MSL 组件，具有砾石和基于土壤的材料交替层。它的水力负荷率为 250 L/m/天。结果表明，污染物和病原体的去除效果显著，包括总悬浮固体（TSS）（97%）、化学需氧量（COD）（88.57%）、总磷（TP）（79.93%）和总氮（TN）（88.49%），同时粪便细菌指标（粪大肠菌群减少 4.21 对数，粪链球菌减少 3.90 对数）和病原菌 sp. 减少 2.43 对数。主成分分析证实了该系统在降低 NH、COD、TP、PO、粪大肠菌群、粪链球菌和粪葡萄球菌浓度方面的有效性，从而支持了该研究的可靠性。这项工作强调了混合 MSL 技术在处理生活污水方面的巨大潜力，特别是在北非和中东等干旱地区，有助于保护环境和促进废水用于景观灌溉和农业的再利用。
