Tuesday, 20 August 2013

LATEST TECHNOLOGICAL ADVANCEMENTS IN ENVIRONMENTAL CONSERVATION

RECYCLING E-WASTE :

The elements that go into mobile phones, computers and TV's can be polluting to the environment and dangerous to human health if incorrectly disposed off. Cloud Blue, based in New Jersey, helps techno companies take care of their e-waste , arranging for direct pick-up and processing, ensuring that valuable metals can be reused and recycled for future electronics.

MOLTEN SALT STORAGE :

Molten salt can be used in solar thermal, which employs powerful mirror to focus the sun's heat to create steam, driving an electric turbine. The surplus heat produced during the day can be used to warm up massive amounts of salt , which can absorb significant amounts of heat. When the sun goes down or when it's simply cloudy, then that heat can be used to generate energy and run an electric turbine.

ROOFTOP WIND POWER :

The start-up Windtronics is developing mini-wind turbines that can be installed on any flat roof, either alone or in larger areas. Each turbine measures about 6 ft. in diameter and looks like a large, circular window fan but it can generate an average of 1500 KW/hr a year, with more or less depending on wind strength.

BIOCHAR :

If plants are cut down and you burn the residue in a controlled , low-oxygen atmosphere- a simple process called pyrolysis-you can create charcoal, a stable and solid form of carbon. If you then mix the biochar with certain soils, you can also reduce the amount of methane and nitrous oxide, both of them greenhouse gases., that the soil would naturally release. A recent study in Nature GeoScience found that biochar could offset 12% of global carbon emissions.

GREEN CONCRETE :

The company Hycrete had reformulated the products used to water proof concrete in a way that allows for recycling in future , reducing the lifetime energy footprint of a building. The London based start-up Novacem is going further, working on a new cement production method that would actually absorb more Carbon-di-oxide then it releases , by substituting with magnesium silicates that contain no stored carbon. As the element hardens, Carbon-di-oxide in the air actually reacts to make solid carbonates that strengthens the cement while holding onto the gas.