Experimental evaluation of a low pressure desalination system (NF-PV), without battery support, for application in sustainable agriculture in rural areas

• Published in: Water science & technology. Water supply Vol. 17; no. 2; pp. 579 - 587
• Main Authors: Dehesa-Carrasco, U., Ramírez-Luna, J. J., Calderón-Mólgora, C., Villalobos-Hernández, R. S., Flores-Prieto, J. J.
• Format: Journal Article
• Language: English
• Published: London IWA Publishing 01.03.2017
• Subjects: Agricultural economics; Agriculture; Alternative energy sources; Aquifers; Brackish water; Desalination; Design; Energy; Energy consumption; Energy recovery; Evaluation; Influents; Inlets (waterways); Irradiance; Irrigation; Low pressure; Membranes; Nanofiltration; Nanotechnology; Photovoltaic cells; Photovoltaics; Power supply; Renewable resources; Rural areas; Salinity; Solar cells; Solar energy; Solar radiation; Studies; Sustainable agriculture; Test methods; Total dissolved solids; Water desalting; Water quality; Water shortages; Water supply; Water treatment; Israel; United Arab Emirates
• ISSN: 1606-9749; 1607-0798
• DOI: 10.2166/ws.2016.147

Desalination driven by solar energy represents an appealing solution for agricultural irrigation in remote areas. In this work, a desalination system based on a photovoltaic-powered nanofiltration (NF-PV) membrane is studied. The experimental work explored the effect of the influent concentration and solar radiation on permeate production, energy consumption, recovery rate and quality of the permeate product. Four cases of different inlet conditions of influent concentrations were studied. In each set, the influent concentration was kept constant, varying only the irradiance along the solar day. In addition, a unit cost of permeated water was estimated. The maximum tested energy consumption was 1.55 Kwh m−3, with a concentration of 2,539 mg L−1 of total dissolved solids. The NF-PV system produces 2.16 to 4.8 m3 d−1, with a permeate water unit cost of 1.05–0.47 US$ m−3.