2. Main treatment routes
These two objectives, qualitative and quantitative, will be achieved through a series of unit operations involving volume reduction, dry matter degradation or stabilization.
Volume reduction is typically achieved through liquid/solid phase separation operations by decantation, filtration or evaporation, as encountered in thickening, dehydration and thermal drying techniques.
Degradation of the sludge's organic matter by biological processes (digestion, composting) or thermal processes (incineration at 850°C, wet oxidation of liquid sludge thickened under 45 bar at 250°C) will also lead to a smaller final volume.
In practical terms, stabilization is achieved by slowing down or even eliminating the putrid biodegradation of the sludge's organic matter, by various biological,...
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Main treatment routes
Overview of treatment processes
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