Desalination of Water Video
Seawater Desalination ProcessApologise, but: Desalination of Water
| HISTORY AND HISTORY HISTORY | 15 hours ago · Minimizing the energy consumption of desalination processes is an important goal for augmenting freshwater production and mitigating water scarcity. Chemical, civil, mechanical, and environmental engineering students can derive and analyze the energy consumption of desalination processes by applying engineering fundamentals such as thermodynamics, transport phenomena, . Oct 20, · Water scarcity is a complex, difficult problem. Climate change is introducing growing uncertainty. Desalination uses a large amount of energy and, . 1 day ago · The reverse osmosis desalination process uses pressure to filter seawater through a semipermeable membrane to produce fresh drinking water. While the technique is more energy efficient than other desalination approaches, its performance can be hindered by the growth of bacteria and other microorganisms on the membrane surface. |
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While reverse osmosis Desalination of Water a relatively energy-efficient form of seawater desalination, it is nonetheless made less efficient by a problem known as biofouling. A new membrane coating, however, could address biofouling like never before. Putting it very basically, reverse osmosis involves using high pressure to force seawater through a semipermeable membrane.
That membrane filters the salt out of the water, but bacteria and other microbes also gradually accumulate on its surface. Over time, those microorganisms form into a slimy biofilm, which makes the membrane less permeable.
As a result, more energy is required to push the water through. And although there already are membrane coatings that help reduce biofouling, many of them incorporate toxic chemicals that Desalination of Water them to the membrane. These chemicals ultimately end up being passed into the sea. This limitation prompted the researchers to develop a non-toxic "polyelectrolyte" coating. It's introduced Desalination of Water a liquid into the stream of untreated seawater, and binds to the surface of the membrane via electrostatic interactions — so no chemicals are required. Once an obstructive biofilm has formed on the resulting coating, a high-saline solution is flushed through the desalination system at an increased velocity. This causes the coating to detach from the membrane, breaking apart and carrying the entire lf away with it.
A new coating is subsequently applied. In lab tests, after the biofilm-removal process had been performed, a polyelectrolyte-coated membrane exhibited a two-fold higher liquid flow rate than an untreated control membrane. Johannes Vrouwenvelder. It is described in a paper that was Wtaer published in the journal Https://amazonia.fiocruz.br/scdp/blog/purdue-owl-research-paper/the-evolution-of-corporate-operations.php. LOG IN. Menu HOME. Search Query Submit Search.
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Facebook Twitter Flipboard LinkedIn. Applied to a reverse osmosis membrane graythe multi-layer coating can periodically be removed, carrying the accumulated biofilm brown along with it. View 1 Continue reading. Ben Coxworth. An experienced freelance writer, he previously obtained an English BA from the University of Saskatchewan, then spent over 20 years working in various markets as a television reporter, producer and news videographer. Ben is particularly Desalination of Water in scientific innovation, human-powered transportation, and the marine environment. Sign in to post a comment. Please keep comments to less than words. No abusive material or spam will be published. FB36 November 16, AM. Related Stories.
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