Tag Archives: GE

Desalination and Clean Water from GE and MIT

Hands down….chemistry was Thomas Edison’s favorite subject. So enamored with its seemingly magical processes, he once said….“I believe that the science of chemistry alone almost proves the existence of an intelligent creator.” Were he here today to see what is being done with chemistry, especially reverse osmosis and its application to desalination, Edison would be very happy indeed.

We think nothing of it every day as we routinely open the sink faucet and draw a glass of water. It is just another aspect of our high standard of living. However, the availability of clean, fresh drinking water is a problem for over one billion people on our planet, a serious impediment to economic development. Sadly in Africa alone, over 50,000 people a year die because they ingested contaminated water.

GE engineers are helping to remedy this problem and have implemented a high-tech desalination plant in Algeria. Using reverse osmosis, a technology stemming directly from GE’s pioneering work in the 1950’s with membrane based water purification technologies, the Hamma Desalination Plant is completely functional, providing millions of gallons of clean, fresh water. Take a look at the recently operational GE Hamma Desalination Plant below, a 53 million gallon per day facility, and enjoy the short video about GE’s work. GE chose reverse osmosis technology because it is energy, cost, and space efficient compared to other desalination methods.

General Electric's Desalination Plant

The technological magic of reverse osmosis occurs along the length and cross-section of the long, white tubes pictured here below. This is a typical reverse osmosis stage in a desalination plant. After the salt water enters the tubes, high pressures are applied to it. This forces the fresh water through openings in a special membrane filter that inhibits the passage of dissolved salt and other minerals in the raw sea water—so only fresh water is collected on the other side. The clean water flows out of the center of each tube assembly and is then collected and stored. [see Editor’s Deep Dive below]

Reverse osmosis stage in a desalination plant

The central electric generating stations and distribution systems originally envisioned by Thomas Edison in the 1880s is what today provides the large amounts of electricity needed to operate desalination plants. Now as the world looks toward natural energy sources like the sun and wind, we will no doubt see desalination plants powered by solar panels and maybe even land and offshore wind turbines. Clean water, courtesy of the sun.

Speaking of the sun, an MIT team just announced a design [below] for a solar-powered reverse osmosis desalination system that could be rapidly deployed in crisis situations to produce drinking water; or used in small scale applications like farms, villages and remote hamlets in developing countries.

Solar-powered reverse osmosis desalination system

A prototype built by the Departments of Mechanical and Aeronautics and Astronautics can produce 80 gallons of water a day in a variety of weather conditions. A larger version is estimated to be able to provide about 1,000 gallons of water per day. The MIT team envisions such units delivered in quantity via large transport planes.

Tom Edison would like all this innovation a great deal. He always felt the sun’s power should be tapped; and he believed that…. way back in 1929.

Editor’s Deep Dive {Links & More}

“I’d put my money on the sun and solar energy. What a source of power! I hope we don’t have to wait until oil and coal run out before we tackle that.” – Thomas Edison


GE Charging Station Bypasses High-Priced Gas Pump

What do you get when GE Ecomagination engineers using smart grid technology team up with Yves Behar, a renowned industrial designer? You get a beautiful and smart parking spot charging station for electric vehicles. Known as the GE WattStation ™, this sleek and attractive portal for city streets will start making its appearance in 2011; and can re-charge vehicles in just four to eight hours.

The first Wattstations will be used for streets, but other models for use in garages, homes, parking lots and such will soon follow. The initial street models will display various color LED lights on their sloped head to indicate the charging port is available for use (green), in use (blue), unavailable (red); but this is only the beginning, because such portals can later be morphed into information gathering and reporting points for the smart grid and consumer use. Who knows, maybe someday, electric vehicles sitting there at a cluster of Wattstations might be used during emergency utility conditions to feed a portion of their stored energy back into the grid, or perhaps providing emergency power to nearby buildings during an outage.

The Wattstation technology helps our nation reduce pollution, reduce its dependence on imported oil, and helps a utility system cope with what will be a significant increase in EVs and their charging needs. This is where GE’s smart grid technology comes into play and provides the necessary real-time communications between the charging posts and the utility company. When it all works right, GE engineers believe that for every 10,000 drivers operating conventional gasoline powered vehicles who switch to EVs will save 33,000 metric tons per year of carbon dioxide emissions; which is equivalent to removing the annual carbon dioxide emissions of 6,500 conventionally powered cars.

Expect utility companies, EV manufacturers, and consumers to show strong interest. This changes our concept of the traditional gas station from a greasy, noisy, environment to a smart and elegant aluminum post, open 24/7/365, with no signs showing gas price hikes. Who’s not for that?

In the Thomas Edison garage on the grounds of his historic Glenmont estate in West Orange, NJ sits the original charging station he used for his legendary work with EVs and the development of his landmark nickel-iron storage battery. All this happened over 100 years ago. Were Thomas alive today to witness GE’s new Wattstation, he would be smiling, and probably already generating many new ideas and twists for it. Between all this excitement over such new technology and sophisticated design, he also would probably smile and say…..”Well done GE!”

“Everything comes to him who hustles while he waits.” ~ Thomas Edison Quote

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