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Advanced Aeration, Inc. Presentation of Vacuum Bubble ® Technology.
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Transcript of Advanced Aeration, Inc. Presentation of Vacuum Bubble ® Technology.
Today’s Challenges inWastewater Treatment
Wastewater Engineers are constantly challenged to: Reduce accumulated solid waste. Reduce power consumption. Reduce undesirable odors. Reduce contaminants in discharged
water (Improve water quality).
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 TreatmentInorganic 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 TreatmentBiological 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 - 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
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
AerationTime:Bubbles stay in the water for minutes
Size:Smaller bubble size = greater surface area
Movement:Bubbles move sideways by diffusion