Faculty of Civil and Environmental Eng., Technion - Israel Institute of Technology, Haifa 32000, Israel.
Water Sci Technol. 2012;65(4):757-64. doi: 10.2166/wst.2012.903.
This study investigated the effects of irrigation with different types of waters on soil, plants, and public health. The test plant was ryegrass grown in 12 planters filled with sandy loam soil and irrigated with three types of waters (4 planters for each type): freshwater, raw domestic light greywater (GW), and treated domestic light GW. The sodium adsorption ratio (SAR), EC, pH and alkalinity of the three types of irrigation waters did not differ significantly, suggesting that raw or treated light GW should not exhibit negative effects. Concentrations of anionic and cationic surfactants in the freshwater and the treated GW were about the same, while their concentrations in the raw GW were higher. Surfactant levels in the three drainage water types were low. Some accumulation of surfactants occurred in planters irrigated with raw and treated GW. The COD of the drainage water of planters irrigated with raw GW was higher than the COD of other two drainage water types. Although raw and treated GW contained faecal coliforms, they were hardly detected in the drainage waters. All plants did not show any signs of stress. This may be due to the fact that the GW originated mainly from showers and washbasins.
本研究调查了不同类型的灌溉用水对土壤、植物和公共健康的影响。试验植物为黑麦草，在 12 个种植盆中种植，种植盆中装满了沙壤土，并使用三种类型的水进行灌溉（每种类型 4 个种植盆）：淡水、未经处理的家庭浅色灰水（GW）和经处理的家庭浅色 GW。三种灌溉用水的钠离子吸附比（SAR）、电导率（EC）、pH 值和碱度没有显著差异，这表明未经处理或处理后的浅色 GW 不应产生负面影响。在淡水中和处理后的 GW 中，阴离子和阳离子表面活性剂的浓度大致相同，而在原 GW 中的浓度较高。三种排水水类型中的表面活性剂浓度较低。在使用原 GW 和处理后的 GW 灌溉的种植盆中，表面活性剂有一定程度的积累。用原 GW 灌溉的种植盆的排水水 COD 高于其他两种排水水类型。尽管原 GW 和处理后的 GW 中含有粪大肠菌群，但在排水水中几乎没有检测到。所有植物均未出现任何胁迫迹象。这可能是因为 GW 主要来源于淋浴和洗脸盆。
