Industrial Filtration, Separation & Dust Collection worked example

Sludge Volume at 58% dewatering efficiency: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop dewatering efficiency to 58%, then walk the calculation through step by step. Estimate sludge volume from slurry volume, solids volume per gallon, and dewatering or concentration efficiency.

The inputs for this scenario

  • Slurry volume processed: 12,000 gal (held at the documented default)
  • Sludge generated per gallon: 0.04 gal / gal (held at the documented default)
  • Dewatering efficiency: 58 % (the input this scenario stresses; the baseline uses 80)

Working through the calculation

  • The calculation starts from the formula this tool documents: Required sludge volume = slurry volume processed × sludge generated per gallon ÷ dewatering efficiency.
  • Required quantity works out to 724 gal at these inputs, and this is the headline figure for the scenario.
  • Theoretical sludge volume works out to 420 gal at these inputs.
  • Sludge volume allowance works out to 304 gal at these inputs.
  • Efficiency works out to 58 % at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where dewatering efficiency sits at 80% and the headline result is 525 gal, this scenario comes in 37.93% above the baseline at 724 gal.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to dewatering efficiency, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats sludge yield per gallon as constant; real yield varies with influent solids loading, coagulant dose, and settling time.

Results at a glance

  • Required quantity: 724 gal (headline result)
  • Theoretical sludge volume: 420 gal
  • Sludge volume allowance: 304 gal
  • Efficiency: 58 %

Run it with your numbers

  • To rerun this with your own numbers, open the live Sludge Volume calculator, set dewatering efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.