S&L FAST® Fixed Activated Sludge Treatment System is a fixed-film, aerobic wastewater treatment system using submerged media for biological treatment. Designed for variable load and flow conditions, it handles flows up to 1,000,000GPD and is supplied as factory-built or field-installed modules in steel or concrete. Internal settling zones and high surface area media support stable operation and efficient nutrient removal.

  • Fixed-film aerobic system for treating wastewater with variable flows
  • No internal moving parts for reduced maintenance
  • Compact footprint due to higher loading rates
  • Handles shock loads and peak usage without process disruption
  • Minimal daily operation required
  • Options include covers, odour control, stainless steel tanks, and control packages

Applications

  • Onsite wastewater treatment for schools, small developments, commercial and public facilities, hotels, camps, and restaurants

Dimensions

Flow capacity up to 1,000,000GPD (3,800cmd)

Options and variations

Factory-built modules

Field-erected systems

Steel or concrete construction

Performance

Design BOD, TSS, and nutrient removal

High resistance to shock loads

Maintenance

Minimal daily operation required