Category: Desalination

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Ceramic membranes have been used in the industrial production of beer, wine and cheese. One of the reasons for this use is the narrow pore size distribution, where careful separation of different size compounds can be achieved. Outside of Japan, the use of ceramic membranes has been almost non-existent for municipal drinking-water systems. The slow…

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…

Aquaporin-embedded membranes to fight water scarcity

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Biomimetics – nature-inspired innovation – is one of the emerging technologies racing to become the first to effectively bring down the energy costs of desalination. Several groups and companies around the world are working on copying nature s method of transporting pure water across a membrane. One of them is Denmark-based Danfoss AquaZ A/S and…

Solar membrane distillation ideal for remote areas

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Fraunhofer ISE develops solar thermally driven compact desalination systems based on membrane distillation for a capacity range between 100 and 500 L/d and larger system capacities up to 10 m&sup3/d. A modular design of systems is important in order to resize them to a wide range of user profiles. Membrane distillation (MD) is a separation…

Low-Biofouling Polypropylene Feedspacers for Reverse Osmosis Applications

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Polypropylene (PP) is a commercial polymer that is ubiquitous in membrane filtration as feedspacer due to its high chemical stability, low cost and versatile properties. The goal of this project was to develop low-biofouling polypropylene reverse-osmosis (RO) feed spacers, which can be used for desalination, through the functionalization of PP with copper ions since copper…

UF solution to rural water supplies?

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Sub-Saharan Africa is not a region generally associated with membrane technology, but that is now changing. Desalination projects are already appearing in, for example, South Africa and Ghana, and South Africa is fast developing its own technologies. Water treatment manufacturer Ikusasa is developing its own UF modules both for rural water supply and for desalination…

Experience helps boost production and stability at Ras Abu Jarjur

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in Desalination, Instruments & controls, Pretreatment/cleaning, Projects, Pumping, piping & storage, Water reuse

Improving production with reduced expenditure could be the main targets of any desalination facility around the world. Such feats are being methodically achieved at Ras Abu Jarjur reverse-osmosis (RO) plant in Bahrain as a result of a series of improvements. Of the many available desalination techniques, RO was seen from the earliest days as a…

Desalination using forward osmosis with nanofiltration membranes

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Forward osmosis (FO) is an emerging membrane technology, often used for desalination. Like reverse osmosis (RO), FO uses a semi-permeable membrane to separate water from dissolved solutes. The semi-permeable membrane acts as a barrier that allows water to pass through while blocking salts. Generally, any dense, non-porous, selectively permeable material can be used as a…

Solar pond and membrane distillation merger in Nevada University

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