SRT-based sludge wasting

Calculator to set waste sludge flow to hit target SRT, including chemical sludge from ferric dosing.

Calculation of waste activated sludge flow. Use the simple model or include mass in the system and chemical sludge from ferric sulphate dosing.

Quick estimate of waste sludge flow based on aeration volume, SRT and solids concentration.

Aeration volume [m³]

MLSS concentration [g/L]

Sludge age SRT [d]

Average plant flow [m³/d]

Effluent TSS [mg/L]

Waste sludge solids [g/L]

Waste sludge flow – simple model [m³/d]

21.25

Waste sludge flow including total mass in the system and optional chemical sludge from ferric sulphate.

Aeration volume [m³]

MLSS concentration [g/L]

Sludge age SRT [d]

Average plant flow [m³/d]

Effluent TSS [mg/L]

Waste sludge solids [g/L]

Regeneration volume [m³]

Regeneration concentration [g/L]

Secondary clarifier volume [m³]

Secondary clarifier concentration [g/L]

Ferric sulphate dose [L/h]

Solution density [kg/L]

Dry solids content [-]

Sludge production factor [-]

Waste sludge flow – extended model (bio) [m³/d]

21.25

Waste sludge flow – extended model (bio + chem) [m³/d]

21.25

Chemical sludge production [kg DS/d]

0.00

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