Engineering Tool · Water Treatment

Water Treatment Residuals & Sludge Designer

Estimate captured raw solids, chemical solids yield, optional backwash and other residuals, and wet-slurry volume.

Status: Available

PROJECT · OPTIONAL

Project metadata

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01 · USER INPUT

Design basis and inputs

Plant flow *m³/d · user-entered flow used for raw-solids and product-mass loading; must be positiveRaw-water TSS *mg/L · measured or declared raw-water solids concentrationRaw-solids capture fraction *fraction · user-entered clarifier or process capture basisCoagulant product dose *mg/L · commercial product mass basisSolids yield factor basis *basis · select commercial product mass or active chemical massUser-entered solids yield factor *kg dry solids/kg selected chemical basis · no universal coagulant yield is embeddedSludge solids mass fraction *fraction · enter 0.02 for 2% by massSlurry density *kg/m³ · explicit slurry density inputFilter backwash volumem³/d · enter together with backwash TSS, or leave both blankBackwash TSSmg/L · paired with filter backwash volume

Add each additional solids source as a separate row.

No additional residual sources.

Engineering calculations run locally in this browser after assets load.

02 · CALCULATED RESULT

Results at a glance

Load or enter inputs, then calculate to create an authoritative result.

03 · REPORTING

Exports and verification

CSV contains input and output detail. PDF uses the current calculation and report metadata.

Verification suite

Calculation revision 6d66d6fb

63 focused fixtures: raw solids conversion/capture, conditional chemical yield, optional paired backwash, named residual rows and contribution shares, wet-sludge conversion, and active-input reporting. Tests are deterministic and run without network access.

Engineering Basis

Methodology

Calculates captured raw solids, entered chemical-solids yield, optional paired backwash solids, and named residual streams, then converts dry solids to wet slurry using entered solids fraction and density. The yield factor is project/user specific; no universal coagulant yield is embedded.

Raw dry solids = plant flow (m³/d) × raw-water TSS (mg/L) × 0.001; captured raw solids = raw dry solids × capture fraction.

Chemical product mass = flow × product dose × 0.001. Chemical dry solids = product mass × the selected product or active-mass basis × the user-entered yield factor.

Backwash solids are included only when both backwash volume and TSS are entered. Other residual sources are entered as named dry-solids rows.

Combined dry solids are the sum of the entered sources. Source contribution = source dry solids ÷ combined dry solids × 100%; percentages are unavailable when the combined total is zero.

Wet sludge mass = combined dry solids ÷ sludge solids mass fraction. Wet volume = wet mass ÷ entered slurry density.

Scope / Limitations

Choose product-mass or active-mass yield basis and declare sludge solids fraction and density. Optional backwash inputs must be paired.
Does not select dewatering equipment, predict cake solids, or estimate polymer dose.
No explicit return/recycle streams, dewatering, cake export, or disposal quantity is calculated; wet volume uses the entered density and mass-solids fraction. No US-unit conversion path is implemented; inputs and outputs use SI units.
No universal coagulant yield is embedded. The yield factor must be entered for the selected mass basis and supported by project or supplier data.

Engineering Path

Upstream Context

Whole-plant configuration and design cases Use the declared process arrangement, flow cases, and operating assumptions as context; this tool supports plant-wide design and is not a sequential stage.

Current Tool Decision

Water Treatment Residuals & Sludge Designer Estimate captured raw solids, chemical solids yield, optional backwash and other residuals, and wet-slurry volume.

Downstream Engineering Step

Unit-process and integrated project review Coordinate this plant-wide result with unit-process design and project review; it does not imply a Stage 07 or a fixed process dependency.

Workflow

Municipal Drinking Water Coordinate this plant-wide result with unit-process design and project review; it does not imply a Stage 07 or a fixed process dependency.