Overview of AIRE-O2 Triton® Technology

History & Development of the AIRE-O2 Triton® Introduced in 1997 Developed to dramatically increase oxygen transfer and mixing Address growing Biological Nutrient Removal (BNR) regulations Prototype unit installed in Norway for leachate treatment Concurrently developed slow speed mixers for specific applications Currently over 2,500 units in the field

How the Triton Differs From a Standard Aspirator Low Speed Motor 900 / 750 RPM Addition of Onboard Regenerative Blower Allows for Process Control (Nitrification / Denitrification) Oversized Mixing Propeller Higher O2 Transfer Double the Mixing Energy Savings Due to Improved Efficiencies and Turn Down Capability

Mixing Propeller Comparison 10 Hp AIRE-O2 Triton® Power Mix™ (Top) 10 Hp AIRE-O2® Aspirator Propeller (Bottom)

New Saturn Ring Diffuser Complete Separation of Mixing and Oxygenation for Nitrification and Denitrification Applications Improved Oxygen Transfer Reduces Drag and Improves Reliability & Longevity New and Improved Saturn Ring Diffuser Original Power ShearTM propeller

The Triton is Designed to Accomplish Three Simultaneous Functions 1. Create a precise flow velocity to provide proper mixing 2. Provide maximum volume of water flow 3. Create shear flows to shear airflow into fine bubbles. Both the Aire-O2® Aspirator and Triton are defined as ‘fine bubble’ aspirators by the EPA.

Why is Fine Bubble Important? With the AIRE-O2 Triton® we are able to inject more air into the water and still break the bubbles into ‘fine bubbles’. Breaking a 1" diameter bubble into EPA defined ‘fine bubbles’ (2mm) increases the total surface area from 3.14 sq. in. to more than 39 sq. in. The ‘fine bubbles’ also have a longer hang time . . . More surface area and longer hang time means more O2 transfer.

AERATION MODE Air is pressurized using a high efficiency regenerative blower The air is forced down the hollow shaft through the Saturn Ring Diffuser The air is then sheered into fine bubbles, while the large mixing propeller forces the air in a downward direction This action dramatically extends bubble hang time and the pressure that the bubble is under, thus increasing oxygen transfer This action allows for deeper tank configurations, thereby allowing a small footprint and less land required for the system.

MIXING MODE When the blower is turned off, the mixing propeller maintains velocities in the channel without the introduction of air This allows for turn down capability when BOD & flows are at lower levels resulting in energy savings Uniform solids suspension in the basin at all depths is maintained for optimal denitrication

Major Features & Benefits High Oxygen Transfer and Dispersion Only Process Aerator Capable of BNR Removal Dual Mode Capability Separates Aeration & Mixing for Anoxic Applications Allows For Complete Control of Process Environment Triton Mixing is 3 to 5 Times Greater Than Conventional Surface Aeration

Major Features & Benefits No Aerosoling, Splashing, or Cooling Turndown Capability to Meet Fluctuating Hydraulic & Biological Loads in Waste Stream = Power Savings  Triton RPM is 900 RPM 60Hz. / 750 RPM 50Hz. which means: Less Wear and Tear of Equipment Less Maintenance = Lower Cost of Ownership Superior Mixing versus traditional high speed aerators No Troublesome & Expensive Gearbox Design

AIRE-O2 Triton® Aerator In Action Fine Plume Demonstrating Bubble Hang Time and Mixing Maximum Oxygen Dispersion = High Oxygen Transfer & Mixing Able to Mix Depths Greater Than 10 Meters Small Footprint Installations Very Quiet (less than 60 decibels) Float, Bridge or Wall Mounting Available Up to 5 Year Warranty

Available AIRE-O2 Triton® Models 5 - 75 Hp 60Hz (3.75 – 55.95 kW) 5 - 60 Hp 50Hz (3.75 – 44.75 kW) Available in IEC and NEMA Worldwide Voltages

New 75 Hp AIRE-O2 Triton® (55.95 kW)

Features In Common with Standard AIRE-O2® Aspirator Aerator Wastewater Bearing / Sleeve Drive Shaft System Float System Bridge/Wall Mount Systems Reliance XT Motor 3 year Warranty

Applications / Markets Municipal Wastewater New Plants Upgrade Facilities (lagoons, ovals, tanks, etc.) Industrial Wastewater Pulp & Paper Petro Chemical Dairy Food Processors Beverage Leachate Meat & Poultry Lakes, Rivers and Harbor Beautification Golf Course Management Aquaculture

Applications/Markets Lagoons Aeration Basins Oxidation Ovals / Ditches

Applications/Markets Sequencing Batch Reactors (SBR’s) Lake Restoration

Examples of AIRE-O2 Triton® Aerators From Around The World Lagoon in Mexico Oxidation Oval in Denmark

Examples of AIRE-O2 Triton® Aerators From Around The World Pulp & Paper in Sweden Activated Sludge in China

Mixing Profile for Triton Aerator

Example of 2000 m3/d Mixing Limited Aerated Lagoon Project Conventional Surface Aeration 50Hp For Oxygen Demand 400Hp For Mixing Aspirator 70Hp For Oxygen Demand 200Hp For Mixing Triton 100Hp For Mixing Thus, client saved 300 Hp (74.6 kW) by choosing Tritons!

Overview AIRE-O2® Mixer Technology

Brief History Development of the AIRE-O2® Mixer R&D program finished in 1996 Developed from AIRE-O2 Triton® unit Same components as AIRE-O2 Triton®, but without blower assist Marketing and sales program launched in 1997 Developed slow speed mixers for specific applications concurrently with AIRE-O2 Triton® units

Available AIRE-O2® Mixer Models 2-30 Hp 50Hz & 60Hz

Features/Benefits Surface Mounted Simple to Install for Supplemental Mixing Proven Design Based on Aire-O2 Triton® Variable Angle Anti-fouling Propeller

Applications/Markets Aeration tanks (surface mounted) Oxidation ovals (surface mounted) SBR’s Sludge digesters Lagoons Anoxic Basins Chemical mix tanks

The AIRE-O2 Triton®/Mixer Technology Once again, we’ve “Revolutionized” aeration