Finishing & Environmental

COD Reduction Efficiency Calculator

Removal efficiency flatters a plant fed weak effluent. Read it beside the outlet concentration.

Plant Readings Inlet and outlet
mg/L
mg/L
m3/day
Consent Regulatory limit
mg/L

COD Removal Efficiency

— %

Proportion of oxygen demand removed

Compliance Position

COD Removed
— kg/day
COD Discharged
— kg/day
Margin Below Limit
— mg/L
Minimum Reduction to Comply
— %

A negative compliance margin means the plant is discharging over consent. Check aeration, sludge age and hydraulic retention before adding chemicals.

COD Reduction Efficiency Calculator — free, with the formula and a worked example, at Textile School.