Flush-Free Fertilizer
Vitamin D-licious Mushrooms
Making the most of a meal
Tree Frogs
Cacophony Acoustics
Chicken Talk
Monkeys Count
Fear Matters
Hitting the redo button on evolution
World’s largest lizard is venomous too
Backyard Birds
Chemistry and Materials
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A Light Delay
Popping to Perfection
It's a Small E-mail World After All
Supersonic Splash
Earth from the inside out
Dinosaurs and Fossils
Watery Fate for Nature's Gliders
Digging for Ancient DNA
Hall of Dinos
E Learning Jamaica
Results of GSAT are in schools this week
2014 GSAT Results for Jamaican Kids
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
Groundwater and the Water Cycle
Detecting an Eerie Sea Glow
Earth from the inside out
Acid Snails
A Newspaper's Hidden Cost
A Change in Leaf Color
Finding the Past
Ancient Art on the Rocks
A Plankhouse Past
A Volcano's Deadly Ash
Nurse Sharks
A Jellyfish's Blurry View
Food and Nutrition
Chew for Health
Sponges' secret weapon
Making good, brown fat
GSAT English Rules
Order of Adjectives
Subject and Verb Agreement
GSAT Exam Preparation Jamaica
10 Common Mistakes When Preparing for the GSAT Math Test
E Learning in Jamaica WIN PRIZES and try our Fun Animated Games
The Annual GSAT Scholarships
GSAT Exams Jamaica Scholarships
GSAT Practice Papers | GSAT Mathematics | Maths
2014 GSAT Results for Jamaican Kids
GSAT Scholarship
GSAT Mathematics
Setting a Prime Number Record
Losing with Heads or Tails
Math Naturals
Human Body
Tapeworms and Drug Delivery
A Long Haul
Heart Revival
Sea Urchin
African Elephants
How children learn
The Surprising Meaning and Benefits of Nursery Rhymes
Raise a Lifelong Reader by Reading Aloud
Project Music
Powering Ball Lightning
Speedy stars
When Fungi and Algae Marry
Hungry bug seeks hot meal
A Giant Flower's New Family
Komodo Dragons
Garter Snakes
Space and Astronomy
A Galaxy Far, Far, Far Away
Solving a Sedna Mystery
Wrong-way planets do gymnastics
Technology and Engineering
Slip Sliming Away
Toy Challenge
Algae Motors
The Parts of Speech
Problems with Prepositions
Adjectives and Adverbs
What is a Noun
Troubles with Hubble
Morphing a Wing to Save Fuel
How to Fly Like a Bat
Where rivers run uphill
The solar system's biggest junkyard
Earth's Poles in Peril
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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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