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Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
Earth
The Pacific Ocean's Bald Spot
In Antarctica watch the heat (and your step)
Earth from the inside out
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Island Extinctions
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Finding the Past
Stone Tablet May Solve Maya Mystery
A Long Trek to Asia
A Volcano's Deadly Ash
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In Search of the Perfect French Fry
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GSAT English Rules
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How are students placed after passing the GSAT exam
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2014 GSAT Results for Jamaican Kids
GSAT Practice Papers | GSAT Mathematics | Maths
42,000 students will sit for the GSAT Exam in two weeks
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Math of the World
Losing with Heads or Tails
Prime Time for Cicadas
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A New Touch
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Tapeworms and Drug Delivery
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African Gorillas
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Parents
Choosing a Preschool: What to Consider
Raise a Lifelong Reader by Reading Aloud
Expert report highlights the importance to parents of reading to children!
Physics
Hold on to your stars, ladies and gentlemen
The Pressure of Scuba Diving
Gaining a Swift Lift
Plants
Making the most of a meal
A Change in Leaf Color
Plants Travel Wind Highways
Reptiles
Anacondas
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Space and Astronomy
Ready, Set, Supernova
Killers from Outer Space
Tossing Out a Black Hole Life Preserver
Technology and Engineering
A Satellite of Your Own
Smart Windows
Searching for Alien Life
The Parts of Speech
What is a Verb?
What is a Noun
Problems with Prepositions
Transportation
Morphing a Wing to Save Fuel
How to Fly Like a Bat
Robots on the Road, Again
Weather
The solar system's biggest junkyard
Recipe for a Hurricane
Either Martians or Mars has gas
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Eating Up Foul Sewage Smells

The smell of rotten eggs that wafts out of wastewater drains and treatment plants is an unwelcome visitor anywhere. In order to meet required standards of air quality, sewage-treatment plants use toxic and expensive chemicals to fight the stench. Now, researchers say they've found a better, cheaper, more natural way to subdue foul sewage smells. The secret? Bacteria and water. The horrible rotten-egg smell of sewage is caused by a gas called hydrogen sulfide. To get rid of it, most treatment plants use devices called chemical scrubbers, which filter the gas through a cocktail of dangerous chemicals. Chemical scrubbers work, but they are expensive and often dangerous. Two researchers tried something different. In a sewage treatment plant in California, they replaced chemical scrubbers with bacteria that break down hydrogen sulfide. The scientists loaded a container with little foam blocks full of the bacteria. Then, they pumped hydrogen gas through the chamber. Finally, they let water constantly trickle over the foam. The system worked so well that the California plant converted several chemical scrubbers to the new kind. If the technique catches on, sewage rot might become equally kind to the earth and to your nose.E. Sohn

Eating Up Foul Sewage Smells
Eating Up Foul Sewage Smells








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