Nelson Environmental's OPTAER system is an efficient pond based integrated wastewater treatment system utilized in both municipal and industrial applications. This system maintains the low capital, operation and maintenance costs of stabilization and aerated lagoon concepts, yet can achieve effluent quality performance in line with and often exceeding conventional mechanical treatment facilities.

The OPTAER system utilizes either new or existing lagoons to provide:

• Ammonia Removal (cold and warm climate)

• Total Nitrogen Removal

• CBOD Reduction

• TSS Reduction

• Phosphorus Removal

• Algae Control/pH stabilization

• MAT Aerated Complete Mix Ponds
• MAT Aerated Partial Mix Ponds
• Anoxic Ponds
• Flow Optimization Baffles
• Floating Cover Systems
• Attached Growth Biofiltration
• Submerged Attached Growth Reactors (SAGR) with LINEAR Aeration
• Chemical Phosphorus Precipitation
• Continuous Backwash Sand Filters

The submerged attached growth reactor or SAGR is designed to allow for cold water nitrification, making it ideally suited for post lagoon applications in severe cold to moderate climates where water temperatures can reach 0.5°C for extended periods of time.

The SAGR consists of a specifically graded aerated coarse gravel bed. Effluent from the secondary treatment lagoons flows through the gravel media. A full aeration grid using the LINEAR FBA™technology provides aerobic conditions in the media. A layer of insulating mulch prevents freezing during winter operation.