Green walls are gaining attention for greywater management in the imminent terrestrial space and land constraint scenario. They have been tested primarily with greywater from a single source such as showers, hand or wash basins, laundry, and kitchen or a mix of a couple of these sources but barely with mixed greywater from all these household activities. Here, a green wall system coupled with a slow sand filter (SSF) was tested for managing household greywater. It consisted of a set of five serial hydraulic flow-connected reactors and an SSF unit. Each reactor housed an Epipremnum aureum sapling embedded in the support bed matrix, consisting of cocopeat and granular activated charcoal. The system operated at 150 cm d⁻¹ hydraulic loading rate (HLR) achieved 90 ± 0.7%, 85 ± 4.5%, 72.9 ± 4.4%, and 60.6 ± 5.1% removal efficiencies for turbidity, chemical oxygen demand (COD), total nitrogen (TN), and total phosphorous (TP), respectively. The system maintained similar treatment performance with varying greywater strength when COD and TN were below ~400 and ~15 mg L⁻¹, respectively. The polished effluent produced by SSF operated at 187 cm d⁻¹ HLR, with characteristics <5 mg L⁻¹ COD, <2 NTU turbidity, <1 mg L⁻¹ TN, ~0.5 mg L⁻¹ TP, ~7.8 pH, and <100 MPN per 100 ml fecal coliforms, qualifies the standards for non-potable reuse applications. Along with reclaimed water reuse, green walls provide environmental benefits by fixing CO₂ in plant biomass. Overall, the low-cost system offers efficient greywater management in an eco-friendly way with minimized resource consumption and areal footprint.

在迫在眉睫的陆地空间和土地限制情况下，绿墙在灰水管理方面越来越受到关注。它们主要使用来自单一来源的灰水进行测试，例如淋浴、洗手盆、洗衣房和厨房或这些来源的混合，但几乎没有使用来自所有这些家庭活动的混合灰水。在这里，对绿墙系统与慢砂过滤器 (SSF) 相结合进行了测试，用于管理家庭灰水。它由一组五个串联液压流动连接反应器和一个 SSF 单元组成。每个反应器都装有一棵金黄色葡萄球菌树苗，嵌入支撑床基质中，该基质由椰糠和颗粒活性炭组成。该系统在 150 cm d ^-1水力负荷率 (HLR) 下运行，对浊度、化学需氧量 (COD) 和总氮的去除效率达到 90 ± 0.7%、85 ± 4.5%、72.9 ± 4.4% 和 60.6 ± 5.1%分别为 (TN) 和总磷 (TP)。^{当 COD 和 TN 分别低于约 400 和约 15 mg L -1}时，系统在不同的灰水强度下保持相似的处理性能。SSF 产生的精制废水在 187 cm d ⁻¹ HLR 下运行，其特性 <5 mg L ⁻¹ COD、<2 NTU 浊度、<1 mg L ⁻¹ TN、~0.5 mg L ⁻¹ TP、~7.8 pH、每 100 毫升粪便大肠菌群 <100 MPN，符合非饮用水再利用应用的标准。除了再生水再利用之外，绿墙还通过固定植物生物质中的CO ₂来提供环境效益。总体而言，该低成本系统以环保的方式提供高效的灰水管理，同时最大限度地减少资源消耗和占地面积。