Author: Water. Desalination + reuse

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Seawater desalination with reverse osmosis (SWRO) has taken a noteworthy upturn during recent years. One of the reasons for the success of the membrane process is its lower energy consumption in comparison with thermal desalination processes. The high-pressure RO desalination stage is undoubtedly the dominating energy consumer of an SWRO plant. Energy consumption of SWRO,…

Advantages of Polyethersulfone (PESU) membranes for pretreatment for SWRO applications

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Membrane pretreatment for large-scale seawater desalination has grown rapidly in the last few years. Existing examples seem to show that the additional cost can be more than recouped in reduced chemical costs alone, but there are also environmental advantages. This article is the first of two discussing the advantages of polyethersulfone (PESU) membranes for filtration…

The coming of membrane distillation technology

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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…

Perth provides world desalination sustainability model

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As the USA finally starts its second large SWRO plant at Carlsbad, Australia is already into a second generation, with contracts let for the Southern Seawater desalination plant, the second to serve the Perth region. The author has for many years been a strong advocate of desalination and has promoted the technology around the world.…

PESU membranes in municipal water treatment applications

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In his previous article (D&WR August/September 2009), Dr Maletzko dealt with the use of polyethersulfone (PESU) membranes in pretreatment systems for seawater reverse osmosis. Here he looks at applications for municipal water treatment and claims improved virus removal and twice the permeability of PVDF membranes. This article first appeared in the November/December 2009 issue of…

Resort uses desalination in innovative reuse project

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The Cache Creek state-of-the-art water reuse project in the USA is very interesting for its use of the Vibratory Shear Enhanced Process (VSEP) for brine volume reduction. However the use of Electrodialysis Reversal (EDR) desalination prior to this process is also of interest, and the project s award from the WateReuse Association (2009 Project of…

Looking back on two years of change in desalination

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At the start of Lisa Henthorne’s presidency, at the Maspolomas Congress in 2007, the board of the International Desalination Association initiated a five-year Strategic Plan. Already parts of the plan, such as better public relations, membership growth, including a Young Leaders program, and the new IDA Journal are all up and running. D&WR asks Henthorne…

Algerian Desalination Market Developments

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In the current market situation, where the financial crisis has frozen most project finance, Algeria maintains its commitments to develop a desalination infrastructure and continues to pursue a milestone program of desalination capacity building which sits among the most ambitious in industry history. By 2011, 13 seawater desalination projects with a total capacity of 2.26…

Should we build any more MSF plants?

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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…

UF solution to rural water supplies?

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