Waste-to-Energy Equipment worked example

Scrubber Chemical Cost at 58% reagent utilization efficiency: a worked example

Suppose reagent utilization efficiency falls to 58%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimates scrubber reagent cost for a waste-to-energy plant from flue-gas volume treated, reagent unit cost, and the fraction of reagent actually consumed in acid-gas capture.

The inputs for this scenario

  • Flue gas volume treated: 5,200 1000 Nm3 (held at the documented default)
  • Reagent cost per 1000 Nm3 treated: 48 $/1000 Nm3 (held at the documented default)
  • Reagent utilization efficiency: 58 % (the input this scenario stresses; the baseline uses 80)
  • Reagent handling & disposal surcharge: 6,500 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Cost = flue gas treated x reagent cost x utilization % + handling surcharge.
  • Total scrubber chemical cost works out to 151,268 $ at these inputs, and this is the headline figure for the scenario.
  • Scrubber chemical cost per unit works out to 29.09 $ / piece at these inputs.
  • Variable scrubber chemical cost works out to 144,768 $ at these inputs.
  • Fixed scrubber chemical cost adder works out to 6,500 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where reagent utilization efficiency sits at 80% and the headline result is 206,180 $, this scenario comes in 26.63% below the baseline at 151,268 $.
  • It computes total scrubber reagent cost as flue-gas volume times reagent price times utilization, plus a fixed handling surcharge, and expresses it per 1000 Nm3. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Total scrubber chemical cost: 151,268 $ (headline result)
  • Scrubber chemical cost per unit: 29.09 $ / piece
  • Variable scrubber chemical cost: 144,768 $
  • Fixed scrubber chemical cost adder: 6,500 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Scrubber Chemical Cost calculator, set reagent utilization efficiency to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.