Question

Sludge is wet solids resulted from the processing in municipal sewage systems. The
sludge has to be dried before it can be composted or otherwise handled. A sludge
containing 70% water and 30% solids is passed through a drier, and the resulting product
contains 25% water.
i) Draw the mass balance diagram and include all the assumptions in your drawing.
[5 Marks]

ii) How much water is evaporated per ton of sludge sent to the drier?

Answer 1

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