Pre-handling of biological sludge

Pre-handling of biological sludge

A system for pre-treating excess sludge from a bio-treatment before incineration in a recovery boiler.

  • A system for treating excess sludge with black liquor from the evaporation plant before incineration together with black liquor in the recovery boiler.
  • Black liquor is used as a medium to hydrolyze bacteria in the sludge.
  • By hydrolysis, the cell membranes burst and thus bound fluid is released
  • Hydrolysis also reduce the risk of scaling on heating surfaces.

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