Proceedings

Ephyra® – digesting thermal hydrolysed sludge: PRESENTATION ONLY

Koornneef, E. and Visser, A., Royal Haskoning DHV

(free)

  • Reducing SRT in a single stage digesters means wash-out of more undigested sludge
  • Therefore loss of VS reduction
  • Mesophilic digestion on THP sludge is quite common with short retention times (< 15 days)
  • But increased application of THP as pre-treatment prior to digestion processes in UK and elsewhere
  • THP sludge has normally high DS content and short retention times
  • Risk of overloading
  • Losing degradable material (short circuiting)
  • Unwanted digesting / methane forming in digested sludge buffers

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