Engineering Tool · Treatment Process Design

FluxMatrix Clarifier & Solids Separation

Screen secondary-clarifier settling, solids flux, and RAS operating windows from basin geometry and loading conditions.

WastewaterStage 05 — Secondary Solids Separation

Status: Available
Phase: Steady-state clarifier screening
Units: Metric / Imperial

FluxMatrix Studio

Steady-state secondary clarifier solids-flux and state-point analysis for activated sludge systems.

01 · Geometry

Clarifier geometry

Area / weir

Geometry type

Units in service count

Diameter m

Side water depth m · visual only

Explicit weir length override m / unit · optional For rectangular geometry, blank uses 2 × (L + W). For circular geometry, blank uses π × D.

02 · Operating loads

Hydraulic and solids loading

Flows / concentrations

Average inflow m³/d

Peak inflow m³/d

RAS flow m³/d

MLSS mg/L

SVI mL/g The selected settling correlation uses SVI in mL/g.

03 · Settling model

Vesilind correlation

v0 / k

Model type

The default SVI correlation is a screening approximation; site-specific settling test data are more reliable.

Output · Operating status

Results overview

Average case

Selected case status Safe / underloaded Waiting for calculation.

Average case Safe / underloaded

Peak case Unstable / overloaded

Limiting flux GL — kg/(m²·h)

Surface overflow rate — m/h

Solids loading SLR — kg/(m²·h)

Theoretical RAS concentration — mg/L

Smallest selected-case margin — Minimum of clarification / thickening margin

Primary visualization · SPA

State-point / flux plot

Gg / Gt / GL

Hover or focus a plotted marker for a numeric readout.

The active case is shown with solid curves and markers. The inactive case remains as a reference marker so average versus peak behavior can be compared without changing the input basis.

Condition view · Illustrative

Clarifier condition visualizer

—

Illustrative condition view based on current solids-loading and flux margins. Not a CFD model or a field blanket measurement replacement.

Load-ratio mapping pending. Clarification condition: pending. Blanket accumulation risk: pending.

The blanket fill is a deterministic visual mapping from Ga / GL only. V1 does not report a numeric sludge blanket depth.

Sensitivity scan · RAS

RAS operating window

0.20 → 1.50 Qr/Q

Deterministic scan for the selected operating case. Every point recomputes underflow velocity, total-flux limiting capacity, demand, margins, and status.

RAS operating window scan results
Qr / Q	Qr (m³/h)	Load ratio	Minimum margin	Status

Review · Deterministic diagnostics

Diagnostics and recommendations

Screening flags

Warnings

No warnings yet.

Recommendations

No recommendations yet.

Traceability · Calculation record

Verification

A concise record of the current validated calculation basis.

Calculation statusPending

Selected caseAverage

Model / correlationDaigger-Roper (1985)

Verification availabilityAwaiting current result

Engineering Basis

Methodology

The workbench presents the accepted calculation response and preserves the declared average and peak operating cases.

Preliminary solids-separation screening covering settling velocity, gravity and total flux, state-point behavior, dense limiting flux, clarification/thickening status, and diagnostics.

Standards / Reference Basis

Secondary clarifier screeningSolids fluxPreliminary screening

Assumptions

Use declared basin geometry and operating loads for preliminary process evaluation.
Units and engineering identifiers retain their canonical meaning.

Scope / Limitations

Confirm final design against project data, applicable standards, and engineer-of-record review.

Engineering Path

Application

Municipal Water Source water, purification, and utility decisions.

Scenario

Municipal Wastewater Treatment & Reuse Engineering circular water economies through Membrane Bioreactors and advanced nutrient recovery.

Workflow

Wastewater Eight decision stages from influent acceptance through preliminary and primary treatment, alternative biological paths, secondary solids separation, optional polishing, disinfection, and effluent/reuse/discharge review.
Stage 05 — Secondary Solids SeparationReturn to Stage 05