Upstream BOD Removal
Remove the majority of incoming biodegradable organic load using a dedicated carrier-media stage.
Engineering Calculation Module
MBBR System Design Calculation
Design a staged moving bed biofilm reactor system using a structured Excel workflow for upstream BOD removal, BOD polishing, two-stage nitrification, carrier-media sizing, reactor dimensions, and linked process review.
4×
Four-Stage Treatment TrainBOD removal, polishing, and two nitrification stages in series.
MEDIA
Carrier Media SizingRequired biofilm area, carrier volume, and fill fraction by stage.
NH₄
Nitrification ReviewTemperature, DO, ammonia limits, and stage-specific nitrification flux.
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Linked DashboardPhysical train dimensions, media requirement, HRT, and key checks summarized visually.
What This Module Helps You Design
Build a staged MBBR train from influent design basis through BOD removal, nitrification media sizing, and practical physical tank dimensions.
BOD Polishing
Reduce residual organic matter ahead of nitrification to limit competition for oxygen and biofilm area.
Nitrification Stage 1
Size the first nitrification reactor from ammonia load, temperature, DO, and carrier-media flux.
Nitrification Stage 2
Polish the remaining ammonia load to the selected final effluent target.
Organic Loading
Track BOD load through the upstream and polishing stages.
Biofilm Area
Calculate required carrier surface area from the selected process basis.
Media Volume
Convert required carrier area into media volume using the selected SSA.
Hydraulic Sizing
Review required and constructed liquid volume and total train HRT.
Nitrification Capacity
Evaluate DO- and NH₄-limited flux and stage-specific ammonia removal.
Engineering Workflow
A connected sequence from influent design basis to a practical four-tank MBBR system.
Define Inputs
Flow, BOD, TKN, solids, temperature, and target effluent NH₄-N.
Size BOD Stage
Determine biofilm area, media quantity, reactor volume, and HRT.
Size Polishing Stage
Reduce residual BOD before nitrification.
Nitrification 1
Size carrier media and reactor capacity for the first ammonia-removal stage.
Nitrification 2
Complete ammonia polishing to the final target.
Review Train
Confirm actual volume, tank dimensions, HRT, media fill, and flux checks.
Workbook Preview
Actual screenshots from the MBBR Design workbook. Public previews show the workbook structure and linked outputs without exposing the full calculation logic.
Designed for Engineering Review
MBBR design links biological loading, carrier-media requirements, nitrification capacity, and physical tank dimensions. The workbook keeps those stages tied to the same design basis.
| Design Area | Key Review Output | Engineering Purpose |
|---|---|---|
| Influent design basis | Flow, BOD₅, TKN, solids, temperature | Define the loading entering the staged biological system |
| BOD removal stages | Carrier area, media volume, reactor volume | Establish upstream organic-removal capacity |
| Nitrification | DO/NH₄-limited flux and media requirement | Confirm ammonia-removal capacity under the selected basis |
| Hydraulic sizing | Required vs constructed liquid volume and HRT | Translate biological demand into practical reactor volume |
| Physical train | Tank width, depth, freeboard, stage lengths | Develop a consistent four-tank arrangement |
| System review | Media fill, capacity margin, geometry and flux checks | Identify conditions that need engineering review |
No Black Box
Follow the staged process from load to physical tank train.
The public page shows the design path without publishing the complete calculation method or detailed proprietary workbook logic.
Design Basis
Flow, organic load, nitrogen load, temperature, and effluent target.
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Stage & Media Sizing
Biofilm carrier area, media volume, liquid volume, HRT, and nitrification capacity.
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Physical System
Four-tank arrangement, stage lengths, actual volume, media inventory, and linked dashboard.
What's Included
A standardized AIDIA workbook structure for staged MBBR process calculation and engineering review.
READ ME
Purpose, scope, assumptions, responsibility, and user guidance.
Cover
Project information, document identity, and revision fields.
Calculation
Stage sizing, carrier-media requirement, nitrification capacity, geometry, and checks.
Dashboard
Linked system arrangement, dimensions, key process parameters, and flux review.
Abbreviations
Engineering symbols, notation, and units used throughout the workbook.
AIDIA Helps With
- Preliminary staged MBBR system sizing
- BOD-removal and polishing-stage media sizing
- Two-stage nitrification sizing
- Carrier-media and reactor-volume calculations
- Physical tank train and design-summary documentation
AIDIA Does Not Replace
- Project-specific engineering judgement
- Pilot testing and guaranteed biological performance
- Carrier-media vendor confirmation and final selection
- Aeration, structural, piping, and mechanical detailed design
- Professional engineering approval
Related Modules
Explore other AIDIA modules for biological wastewater-treatment design.
Start with a structured MBBR system calculation.
Bring staged BOD removal, carrier-media sizing, nitrification capacity, reactor dimensions, and process review into one connected AIDIA Excel workflow.