High-Rate Anaerobic Digesters


High-Rate Anaerobic Digesters

  • Retains anaerobic bacteria to perform sewage treatment and biogas generation
  • Decouples hydraulic retention time (HRT) from solid retention time (SRT)
  • Utilize gravitational sedimentation
  • Returning some of the active organisms to the digester decreases digestion time
  • Examples:
    • Anaerobic activated sludge process
    • Continuous stirred tank reactor (CSTR)
    • Up-flow anaerobic sludge blanket (UASB) digestion