Customer: not disclosed

Service: Feasibility Study - Sludge Pumping

Objective:
To establish if it was possible to increase the solids concentration of a sewage sludge (from 2% to 8% dry solids) prior to pumping it to a sludge treatment centre

Approach:
Typical sludge samples were analysed to determine their rheological characteristics at various dry solids concentrations from 2% to 8%. Once the rheology had been established then the pipeline pressure losses were predicted using in-house software for a range of flowrates and solids concentrations.

Outcome:
The analysis showed that the maximum concentration it would be possible to pump would be just 4%. Above this concentration the pressures required to pump the sludge would be greater than the pressure rating of the pump and at concentrations above 6% the pumping pressures would be greater than the pressure rating of the pipe.

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