Engineering Tool · Treatment Process Design

BNRMatrix Biological Nutrient Removal

A²/O process screening and preliminary design for nutrient removal, recycle, solids, hydraulics and aeration.

WastewaterStage 04 — Biological Treatment & Nutrient Removal

Status: Live Engineering Tool
Scope: Hydraulics · Streams · Aeration
Units: Metric / Imperial

1. Hydraulic & Influent Loads

Raw wastewater flow rates, temperatures and constituent loadings

Influent Stream 1

Flow Rate (Q)m³/d

Water Temp (T)°C

Carbonaceous ConstituentsBOD₅/COD = 0.50

Total CODmg/L

BOD₅mg/L

Nitrogen Species

NH₄/TKN = 78%BOD/TN = 4.4

Total TKNmg/L

Ammonia (NH₄-N)mg/L

Phosphorus, TSS & Buffer

Total TPmg/L

TSSmg/L

Alkalinitymg/L

Buffer Check:✅ Adequate raw alkalinity

2. Effluent Targets & Process Constraints

Regulatory discharge limits and biomass operating criteria

Design Criteria Set

Target Discharge LimitsAll in mg/L

TN Target≤ mg/L

NH₄-N Target≤ mg/L

TP Target≤ mg/L

BOD₅ Targetmg/L

COD Targetmg/L

TSS Targetmg/L

Reactor Biomass & Safety Constraints

MLSSmg/L

MLVSS/MLSSfraction

SF (Nitrification)2x

Aerobic DOmg/L

RAS TSSmg/L

Anaerobic HRThours

Awaiting the current result

The process flow updates automatically after the backend solve.

Engineering Basis

Methodology

Uses the declared A²/O process basis to screen reactor zones, nutrient targets, recycle, solids, hydraulics, and preliminary aeration.

The browser sends the declared request to bnrmatrix-api; the returned result carries the contract and model authority used for presentation.

Standards / Reference Basis

ASM-based activated-sludge process basisPreliminary engineering screening

Assumptions

Calculation authority, formulas, constants, validation, and feasibility logic remain in the configured Worker.
Hydraulics, streams, closure, aeration, and report values are presented only from the current accepted Worker result.

Scope / Limitations

For preliminary process evaluation; confirm final design against project data, applicable standards, and engineer-of-record review.
The workspace is English-only; units and engineering identifiers retain their canonical meaning.

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 04 — Biological Treatment & Nutrient RemovalReturn to Stage 04