Do you remember that famous line from The Rime Of Ancient
Mariner- "Water Water Everywhere nor a drop to drink"
To prevent mankind from facing such situation have you ever
thought about converting waste water into fresh water? That too using less
energy than waste water management.
A professor of Missouri University has devised a method to
obtain fresh water after processing waste water, that too using less energy and
minimal maintenance plus, this system can also be retrofitted with existing
design of water treatment plant.
a professor of civil, architectural and environment
engineering at Missouri S & T , Dr. Jianmin Wang, developed the system to
save energy on the waste-water treatment process. "Nearly one percent of
america's total energy produced is being consumed by waste water
management" Dr. Wang states
In most of waste
water facilities, the treatment plant uses energy to put air in the tanks.
Microorganisms then feed on oxygen, at the level of 2 milligram oxygen per
liter. This amount is adequate for microorganisms.
However, giving the microorganisms less than 2 milligrams
per liter of oxygen extends their lives and increases their efficiency, all at
a 30 percent less energy cost than the current method.
Beyond all this he has also developed a system called
Alternating
Anaerobic-Oxic-(A30)Wang, that
removes pollutants from waste-water, along with nitrogen and phosphorus,
without the use of chemicals. It also uses 10 percent less energy than current
similar treatments. The accessibility of waste water can be increased By
technologies like the A30.
Third system which Wang developed is an anaerobic digester,
that turns waste water sludge into bio-gas.. It also operates itself, so
requires less energy to work.
"Advances such as these demonstrated by Professor Wang
represent the next wave of wastewater management," says Dr. Glen Daigger,
past president of the International Water Association. "Given growing
water and resource constraints on the planet, we must turn to sources such as
used water - to both supplement our water supply and to do this with a reduced
environment footprint."
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