Water desalination: clean water for a thirsty world

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desalination

 

Desalination

The two desalination plants featured in this article, one in San Diego, California, and one in Tel Aviv, Israel, represent the two largest desalination plants using reverse osmosis in the world. Desalination represents a part of the solution to the world water crisis, along with wastewater treatment, and distributing water filters to the poor, especially in 3rd world areas. Worldwide, only 1 in 9 people have access to clean drinking water, Although Carlsbad and Tel Aviv don’t represent the struggles with water scarcity in the third world, they do represent solutions to the growing need for clean water in the world, as a whole. Both plants use a technology called reverse osmosis as part of the process.

from: http://www.citylab.com/tech/2015/12/a-look-inside-the-largest-desalination-plant-in-the-western-hemisphere/420501/:

"The largest ocean desalination plant in the Western Hemisphere is open in Carlsbad, San Diego, heralding what may be a new era in U.S. water use."

carlsbad

                              [Carlsbad desal plant]

 

from: http://www.technologyreview.com/featuredstory/533446/desalination-out-of-desperation/:

"Global desalination output has tripled since 2000: 16,000 plants are up and running around the world, and the pace of construction is expected to increase while the technology continues to improve. Desalination is ripe for technological improvement. A combination of sensor-driven optimization and automation, energy-efficient technology that is said to nearly halve energy consumptionplus new types of membranes, could eventually allow for desalination plants that are half the size and use commensurately less energy. Among other benefits, small, mobile desalination units could be used in agricultural regions hundreds of miles away from the ocean, where demand for water is great and growing. Already, some 700 million people worldwide suffer from water scarcity, but that number is expected to swell to 1.8 billion in just 10 years. Some countries, like Israel, already rely heavily on desalination; more will follow suit."

 

from: http://www.technologyreview.com/featuredstory/534996/megascale-desalination/:

"10 miles south of Tel Aviv, Israel, a vast new industrial facility hums around the clock. It is the world’s largest (larger than the Carlsbad plant) modern seawater desalination plant, providing 20 percent of the water consumed by the country’s households. Thanks to a series of engineering and materials advances, however, it produces clean water from the sea cheaply and at a scale never before achieved, demonstrating that seawater desalination can cost-effectively provide a substantial portion of a nation’s water supply."

tel aviv desal plant

                     [Tel Aviv desal plant]

Green Urban Planning

Today, green urban planning is more important than ever. We provide facts about seven cities that are focused on utilizing various approaches to sustainable development. You can find out about many sources of renewable energy here.

City planning committees around the globe are becoming more focused on the importance of using sources of renewable energy, rather than fossil fuels and other finite resources. Our goal is to teach our readers about eight of the greenest cities in the world. As you peruse this site, you will gain insight into the worlds of renewable energy, urban planning, green building and sustainable mass transit. For instance, you will learn about an example of a bus system, located in Curitiba, Brazil, that serves as a standard of efficiency for other metropolises throughout the world...

 

Sustainability Trends

Ideas for a Greener Home

  • Reduce, reuse, recycle
  • Use eco-friendly cleaning supplies
  • Favor cloth over paper products
  • Chlorine-free baby diapers/ wipes
  • Choose natural lawn care - stop using pesticides and synthetic fertilizers
  • Use biodegradable detergent and oxygen bleach
  • For clean, safe drinking water without all of the waste - use a water filter and a reusable bottle
  • Install low-flow toilets

 

Energy Saving Ideas

  • Use CFL or LED light bulbs
  • Use Energy Star labeled equipment
  • Turn off all home and office equipment when not in use
  • Turn off lights when not in use
  • Turn down the thermostat - lowering it by just one degree can reduce heating energy costs significantly
  • Avoid "phantom loads" (electrical equipment that still uses energy even after turned off) by using a power strip
  • Reduce your water heater temperature from 140 degrees to 120 degrees
  • Install double-pane windows