Desalination

US researchers have developed a portable desalination unit that generates clean drinking water without filters or high-pressure pumps. The device is powered exclusively by solar energy and requires just 20 W of power per liter.

A floating, reverse-osmosis-based unit turns seawater into potable drinking water through the power of the sun and waves. Oneka developed the product, which requires no external electricity source and no land.

The Agua+S project under development in the Spanish region of Andalucia is aimed at combining a desalination plant, a pumping station network, and an onshore, floating photovoltaic plant in a single project design. According to its developers this is the first time that these three facilities have been combined together in a fully reproducible design that could be replicated in any river basin that has a reservoir and is close to the coast, to produce fresh water for both irrigation and human consumption.

Scientists have investigated how utility-scale solar may be used to power multistage flashing-brine recirculation (MSF-BR) water desalination plants in Aqaba, Jordan. They found the facility would be sufficient to provide the entire city with drinking water. The proposed system configuration comprises a 30 MW solar plant and a standar MSF-BR unit.

With renewable energy generation said to consume up to 95% less water than fossil-fuel fired power plants, solar could lead the way to a less stressed existence in mid century, according to researchers from Finland’s LUT.

The BWRO unit, which has a treated water production capacity of around 11.80 ​L/h, was built with a pre-filtration module, a high-pressure DC pump, an RO module, and a post-treatment module. The PVT system was designed to meet the energy requirement of a high-pressure DC pump and a diaphragm-type circulation pump utilized to circulate soft water beneath the PV module for the active cooling of the panel itself.

A new €99 million solar project will help the Rambla Morales desalination plant, which shut down in 2011, to resume operations by fall 2022.

Italian start-up Genius Watter has developed a solar desalination solution that is claimed to be particularly suitable for remote areas with no connection to grid electricity. The system is able to produce up to 1,000 cubic meters of potable water per day at an opex of €0.20 per cubic meter.

Trade bodies the Africa Solar Industry Association and the African Hydrogen Partnership hosted a two-day virtual conference to discuss the role green hydrogen can play in economic growth across the continent–and how it could drive desalination in freshwater-starved coastal countries.

Spanish water-treatment specialist Emalsa has teamed up with Instituto Tecnologico de Canarias ITC and Universidad Europea de Canarias to study the feasibility of a 1.53 MW floating solar plant that could potentially power the Piedra Santa desalination plant in Gran Canaria.