Severn Trent Services offers the TETRA® SAF™, a simple process for the biological oxidation of ammonia-nitrogen (NH3-N) and BOD for both municipal and industrial wastewaters. TETRA SAF offers exceptional performance, reliability, and operational and maintenance cost savings over competitive systems. TETRA SAF is an upflow, fixed-film biological reactor that uses coarse media requiring no backwashing. A robust and small footprint system, it can be used as either a secondary or tertiary treatment. When combined with primary and final settlement, TETRA SAF offers a complete high performance treatment process.
Effluent qualities of 5:1 BOD to NH3-N (mg/l) can easily be achieved. Effluent NH3-N of less than 0.5 mg/l has been demonstrated. Typical loading rates of 80 lbs/1000 ft3/day BOD and 30 lbs/1000 ft3/day ammonia can be achieved.
SAF Advantages:
- Guaranteed system performance
- Produces high effluent qualities; tolerates variations in biological and solids loadings
- Eliminates the high headloss conditions allowing the use of deeper media beds
- Eliminates the plugging potential typically associated with BAF
- Eliminates air and water distribution problems
- No backwashes are required
- Process air blowers and low head feed pumps constitute the only major power requirement
- Minimal process monitoring is required releasing valuable operator time
- Utilizes a durable media with a long proven performance life in excess of 20 years
- No moving or serviceable parts
- Small footprint