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