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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