Tag: Research

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The Marin Municipal Water District (MMWD), near San Francisco, USA, has been exploring seawater desalination to provide a drought-proof supplement to its over-extended water supply. Desalination of San Francisco Bay water presents challenges for pretreatment due to the frequent changes in water quality from the ebb and flow of the tides and winds, seasonal changes…

Bureau pilot tests show MBR reclamation potential

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Membrane bioreactor (MBR) is a proven technology for wastewater reclamation that combines biological treatment with membrane filtration to achieve high quality effluent. Montgomery Watson Harza (MWH) and the city of San Diego have been conducting research on the MBR process since 1997 through various research projects. This article is derived from the report entitled Evaluation…

MEDVSA: a methodology for design of brine discharges into seawater

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Desalination is increasing fast in Spain, especially on the Mediterranean coast. The brine generated in the process is discharged into the sea, producing a negative impact on the endemic and stenohaline marine ecosystems, for instance, the Posidonia oceanica and Cymodocea nodosa meadows. MEDVSA is an R&D project, subsidized by the Spanish Ministry of the Environment…

Boron nitride nanotube membranes outstrip carbon copies

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One approach to improve the desalination process would be to design a more efficient membrane. Embedding nanotubes in the membrane is one area of research. Investigation of water transport through nanotubes in the past has primarily focused on carbon nanotubes, where the water has been found to flow extraordinarily fast in addition to rejecting salt…

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…

Ozone improves ceramic membrane use for wastewater reclamation

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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…

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…

New recovery technologies can minimize concentrate volumes

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Several emerging technologies show potential to enhance recovery rates during desalination of brackish water. These processes include emerging approaches for concentrate treatment and new desalination technologies. Emerging concentrate treatment technologies that aim to enhance recovery and thus minimize concentrate include physical-chemical or biological treatment of concentrate followed by further reverse-osmosis (RO) treatment; new RO methods…

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…

Solar pond and membrane distillation merger in Nevada University

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