Sludge Volume Calculator
The Sludge Volume Calculator estimates daily sludge production in a water or wastewater treatment plant based on influent flow rate, TSS concentration, and sludge solids percentage.
Educational estimate. Calculator results are for planning and information only, not financial, tax, medical, legal, or engineering advice. Verify important decisions with official sources or a qualified professional.
Sludge Volume Calculator
WTP/STP Sludge Production Calculator
📐 Formula & Method
Dry Solids Load
Because 1 mg/L equals 0.001 kg/m3, the concentration is divided by 1000 after applying the assumed removal fraction.
Sludge Volume
The solids percentage is converted to a decimal before dividing by sludge density.
📋 How to Use
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1
Enter the plant flow in m3/h.
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2
Enter influent TSS in mg/L and the expected sludge solids percentage.
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3
Use a realistic sludge density; 1020 kg/m3 is a common preliminary value.
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4
Click Calculate to see dry solids and sludge volume.
🧮 Worked Examples
Validation case
Flow 100 m3/h, TSS 200 mg/L, 90% removal, 3% solids, density 1020 kg/m3.
Sludge Volume Calculator — Engineering Reference
This calculator estimates daily sludge production from flow, suspended solids concentration, assumed 90% TSS removal, sludge solids content, and density.
Use the result for preliminary planning only. Actual sludge volume depends on biological yield, coagulant dose, volatile solids, thickening performance, and site-specific operating data.
🔬 Methodology & Accuracy
Formula: Assumes 90% TSS removal, converts mg/L to kg/m3 using 1 mg/L = 0.001 kg/m3, then computes raw and 6% thickened sludge volumes from dry solids, density, and solids fraction.
Data sources: Standard wastewater process mass-balance formulas; EPA and Metcalf & Eddy style preliminary design conventions.
Last reviewed: June 2026 · Accuracy: Results are precise to two decimal places using IEEE-754 double-precision arithmetic. Intended for educational and planning use only.
For informational purposes only. Results are estimates based on the inputs and formulas provided. For financial, tax, medical, or legal decisions, consult a qualified professional. Rates and regulations change — always verify current figures with official sources.