Transcript It`s All About the Bubble_Part 1

Advanced Aeration, Inc.
Presentation of
Vacuum Bubble® Technology
“It’s All About the BubbleTM!”
Today’s Challenges in
Wastewater Treatment
Wastewater Engineers are constantly
challenged to:
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Reduce accumulated solid waste.
Reduce power consumption.
Reduce undesirable odors.
Reduce contaminants in discharged
water (Improve water quality).
Wastewater Treatment
Basics
Wastewater Treatment
All forms of wastewater consist of both
organic and inorganic contaminants:
Solids that can settle out, suspended
solids (cloudy water), and dissolved
components.
Wastewater Treatment
Inorganic contaminants are usually
handled with physical and chemical
processes:
– Settling – gravity working for you
– Filtration – screens, skimmers, etc.
– Special equipment & chemicals
• Oil/water separators
• Dissolved air floatation (DAF) systems
• Polymers & floculants
Wastewater Treatment
Biological treatment processes focus on
the organic content in wastewater.
Microscopic organisms (bacteria)
degrade dissolved organic compounds
rapidly to generate energy and build
new bacteria.
Excess organic loading can result in too
much accumulated activated sludge.
Wastewater Treatment
Substantial contact time is required for
bacteria to degrade organic matter.
Bacteria can rapidly degrade dissolved
contaminants in water.
Solids are degraded more slowly over
time.
Bacteria
Three types –
• Anaerobic – Slow and smelly (H2S and
CH4).
• Aerobic – Prolific, efficient and clean
(CO2 and H2O).
• Facultative – can be either aerobic or
anaerobic.
Optimize Organic Degradation
• Tilt the balance of microbial activity
toward Aerobic digestion.
• Achieved through optimization of
Oxygen Transfer Potential.
• Utilize Aeration technologies.
Aeration
TM
How is VBT
different?
Aeration - Methods
Many are only mixers or circulators.
True aeration introduces bubbles
into water.
Forced Air Bubble Formation
• Compressed air diffusers and Venturi
systems all create bubbles with internal
pressures greater than external
pressures in the water column.
Vacuum Bubble® Formation
• VBTTM patented bubble production
creates bubbles with internal pressure
slightly less than external pressure of
the water column.
Vacuum Bubble® Formation
• VBTTM bubbles shrink until reaching
equilibrium.
• VBTTM bubbles stay in the water for
several minutes.
Bubble Sizes
One 20mm Bubble =
- 300 3mm Bubbles
Surface Area – 12.6cm2
Total Surface Area – 84cm2
6x greater than 20mm Bubble
- 500,000 0.25mm Bubble
Total Surface Area – 1000cm2
80x greater than 20mm Bubble
12x greater than 3mm Bubble
Bubble Size
and
Aeration
Size:
Smaller bubble size =
greater surface area
Time:
Bubbles stay in the
water for minutes
Movement:
Bubbles move
sideways by diffusion