The Use of Greywater and Wastewater for Irrigation

Dear Colleagues,

Global population growth, urbanization, and climate change emphasize the need for new water sources and the vulnerability of water sources to pollution. In this context, the 2017 United Nations Global Water Report focuses on wastewater reuse as an ‘untapped’ source to confront both water availability and its pollution. In rapidly growing urban centers as well as rural areas, the lack of wastewater collection and treatment often hamper its safe reuse. Onsite separation of black water, the waste stream from toilets, from greywater (GW), representing the other waste streams (such as showers, laundry, and wash basins) and the latter's reuse have gained acceptance in the last three decades. As GW is the less polluted stream of domestic wastewater, its onsite treatment and reuse has the potential to benefit users (e.g., water saving and water availability), and on a national scale, to create a new source of water and reduce investment in infrastructure. However, along with its benefits, wastewater and GW reuse carries potential risks and challenges that cannot be ignored and must be mitigated for safe reuse in general and for irrigation in particular. Topics such as (but limited to) implementation of technologies (mostly onsite) for wastewater/greywater treatment; pollutants in GW and wastewater; antibiotic resistance; health and environmental risks characterization; risk assessment; standards and standardization; and impact of reuse on soil and plant quality will be considered.

Prof. Dr. Amit Gross
Prof. Dr. Zeev Ronen
Guest Editors

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