Advanced Treatment (<30 mg/L BOD & TSS, nitrification or nutrient control)

EDI continues to move forward with lagoon process and hardware innovations. The ATLAS technologies from EDI provide the following unique process and operational benefits:

• Upgrade existing lagoons or use with new construction
• Economical installed cost for full advanced treatment levels for BOD and TSS with ammonia and nutrient control
• Low operating cost using high efficiency FlexAir™ aeration systems with more than 20 years of successful operating history
• Multiple process choices
• Stage treatment options for long-term facility viability
• Reduce land area requirements
• Year round performance in warm or cold climates
• Minimal increase in operator attention, monitoring, or maintenance requirements over conventional lagoons
• Simple and economical long-term sludge management using lagoon-based stabilization and storage

ATLAS – EC™ (External Clarifier) – The ATLAS – EC uses floating or fixed grid aeration systems in conjunction with conventional mechanical clarifier components. ATLAS – EC is ideal for large flow, direct discharge applications with independent solids management facilities.

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ATLAS – IC™ (Internal Clarifier) – The ATLAS – IC system uses an internal clarifier that is constructed in the lagoon biological reactor. The ATLAS – IC system is ideal for small to medium sized, new construction applications with independent solids management facilities.

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ATLAS – IS™ (Internal Separator) – The patented ATLAS – IS system uses an internal separation module for biological solids recovery and recycle. The solids separation mechanism is self-regulating and requires minimal operator support for proper performance. Waste solids are managed in partial mix and quiescent reactors eliminating the requirement for additional solids management facilities.

Read “ATLAS-IS™ Demonstration Project Performance Update – Jan 2006” and see current performance information for the ATLAS-IS system at Ashland, MO.  The ATLAS-IS system was originally installed in 2002 to demonstrate the cold weather nitrification capabilities of the process.  The system continues to be operated by the City of Ashland since the completion of the demonstration project in March 2004. The report presents performance information for the plant thru January 2006.

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The ATLAS - DBBR™ (Internal Decanted Bio Balanced Reactor) system integrates conventional decanted reactor technology with EDI’s “equilibrium” solids management program to improve the performance capabilities of lagoon-based wastewater treatment systems. Conventional lagoon treatment systems that are experiencing any of the following conditions will benefit from the application of the ATLAS - DBBR system: Hydraulic or organic overload, Inadequate BOD or TSS reduction, Poor ammonia conversion, High effluent total nitrogen, Reduced cold weather performance.

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