Lagoons
S&N Airoflo products have been utilized in all types of wastewater applications including Activated Sludge Basins, Oxidation Ditches, Aerobic Digesters, EQ Basins as well as Lagoons.
Aerobic Digesters
Activated Sludge Basins
Oxidation Ditches
Cold Weather Applications
What is a S&N Airoflo Floating Brush Rotor?
Quick and Simple Installation
All in a matter of hours, not days
Regulatory Approval
• In 1989, S&N Airoflo requested an approval for the use of its rotors at 4 HP/mg vs. the state standard of 8 HP/mg.
• S&N Airoflo supplied O2 transfer and mixing tests performed at Auburn University to the Mississippi Department of Natural Resources, who in turn forwarded the information to Region IV Department of Environmental Quality in Atlanta, GA.
• S&N Airoflo units approved for 4 hp/mil gal partial mix – one half of the original 8 hp/mil gal.
• Ruleville, MS – first WW installation. MDEQ suggested S&N equipment. Add 200 households to system.
Placement Effects on Treatment
Modified Raceway
• 7 acre facultative lagoon converted to raceway design
Influence of Placement
• Eliminates short-circuiting
• Completely mixes the influent and exposes it to O2
Serpentine Flow Pattern
• Water moves from unit to unit
• Independent Mixing Zones
• Creates separate zones of mixing and treatment
• Prevents short-circuiting
Multi-Cell Facility: Soft Drink Plant
Gulf State Canners, Inc. – Clinton, MS
Velocity Test
Performed by:
Dennis D. Truax, PhD., P.E., D.E.E.
Department of Civil Engineering
Mississippi State University
• One 10 HP unit operating
• Approx. 0.4 surface acres (0.7 mil gal @ 14 HP/mg)
• Approx. 7 ft. at deepest point
• Velocity and sludge accumulation measured
• Collected at 7 points by two people in a rope-stabilized boat using a digital velocity meter
