Tag: Energy
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Red Sea to Dead Sea investors pledge $450 million
The ambitious Red Sea to Dead Sea (RSDS) desalination project that aims to provide water to Israel, Jordan, and Palestine, has agreed investments of $450 million.
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US farmers look to water reuse, as reservoir level drops
Water reuse in agriculture is gaining ground in the USA as farmers and water technologists seek to overcome the domestic water supply shortages caused by drought. The latest figures from the US Bureau of Reclamation show that water levels at Lake Mead, Nevada, the largest reservoir by capacity in the USA, hit a record low…
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The coming of membrane distillation technology
Membrane distillation (MD) is a unit operation that uses hydrophobic membranes as a barrier for contaminated water from which mass transport of vapor is driven by differences in vapor pressure. MD does not require a mechanical pressure pump, and temperature levels are such that low-grade heat sources may be used to supply the required energy…
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Sydney’s SWRO desalination project – working towards sustainability
Sydney’s desalination project will produce 250,000 m /d of drinking water, which equates to approximately 15% of Sydney’s supply. Sydney is currently solely reliant on surrounding dams for water. Seawater desalination will form a supplementary water source with water from the plant directly injected into Sydney’s drinking water network. In planning for the plant, Sydney…
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Should we build any more MSF plants?
Multi-stage flash (MSF) evaporator technology was for a long time the most popular technology for large seawater desalination plants. However, MSF has had to face strong competitors in recent years. Reverse osmosis (RO) and multi-effect distillation (MED) are squeezing MSF out of the market. Is there really a future for MSF? This article looks at…
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Navajo powerplant could be key to Sandoval BWRO
A Navajo tribal enterprise to colocate a gas-fired power plant could be a key element of a proposed desalination plant for brackish groundwater in New Mexico, USA. The plant is also looking at an annual revenue of US$ 4.6 million from selling waste residuals. The commissioners of Sandoval County gave approval for design work to…
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Desalination must pay more attention to solar energy
The day is coming when membrane technologies for hitherto unthinkable purposes, such as rural water supply in Africa, will be competitive with the ever more difficult search for conventional supplies. The key element is energy, and these authors argue that renewable energy from the sun is not being given enough attention by governments, developers and…
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Construction completed on Australia’s largest recycled water project
Wastewater reuse is a hot topic in Australia, with the “toilet-to-tap” label being trotted out on many occasions. In the state of Queensland, it has a lot more relevance because, as well as a brand new desalination plant at Gold Coast, the state now has a giant new municipal water reuse scheme. This article discusses…
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ADC baselines SWRO desalination system performance
The Affordable Desalination Collaboration (ADC) has completed a major milestone in its test program that profiles the state-of-the-art performance for seawater reverse-osmosis (SWRO) technology. This testing ran over two years and involved operating seven sets of standard 8-in diameter membranes in seven-element pressure-vessels. The ADC demonstration plant was designed to produce between 48,100 to 75,600…
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Doing away with RO energy-recovery devices
Energy-recovery devices have been a crucial element in the reduction of the cost of desalination during the past decade, bringing the technology within reach of conventional water resources costs in certain circumstances. Typical energy consumption for seawater reverse osmosis (SWRO) is now around 2.5 kWh/m . Desalitech’s Closed Circuit Desalination, which does away with an…