material question

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jnsnn

Engineering

Description

The wastewater treatment plant at the Ossabow Paper Company paper mill generates about 24.0 tonnes of sludge per day.

The consistency of the sludge is 45.0%, meaning that the sludge contains 45.0 wt% solids and the balance liquids.

The mill currently spends $40.0/tonne to dispose of the sludge in a landfill.

The plant enviromental engineer has determined that if the sludge consistency could be increased to 75.0%, the sludge could be incinerated (burned) to generate useful energy and to eliminate the enviromental problems associated with landfill disposal.

A flowchart for a preliminary design of the proposed sludge-treatment process follows.

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