BioWin 6.33 is the mid-2025 minor update to the flagship wastewater treatment process simulation software developed by EnviroSim Associates Ltd. (Canada). Released around July 2025, this version builds on BioWin 6.2 but aligned with ongoing enhancements) with refined calibration tools, improved respirometry integration, and better handling of anaerobic processes. BioWin enables engineers, operators, and researchers to model biological, chemical, and physical processes in wastewater treatment plants (WWTPs), supporting design, optimization, and operational decisions for municipal, industrial, and specialized systems.
Official Name: BioWin® Wastewater Process Simulator Version: 6.33 (minor release; core features from 6.x series) Developer: EnviroSim Associates Ltd. Primary Use: Activated sludge, SBRs, anaerobic digestion, nutrient removal, and whole-plant modeling
BioWin is trusted globally by agencies like EPA, utilities, and consultancies (e.g., for projects in North America, Europe, and Asia) to reduce capital/operating costs by 10–30% through scenario testing.
Key Capabilities of BioWin 6.33
| Domain | Core Functionality |
|---|---|
| Biological Modeling | Activated sludge (ASM1/2/2d/3), nitrification/denitrification, EBPR, fermentation, and hydrolysis |
| Chemical/Physical | pH calculations, oxygen transfer, settling (1D/2D clarifiers), gas-liquid mass transfer |
| Advanced Processes | Anaerobic baffled reactors (ABR), MBRs, SBRs, sidestream treatment, biogas production |
| Optimization | Energy audits, control strategies (e.g., DO, nitrate control), sensitivity/scenario analysis |
| Integration | SCADA real-time data via BioTwin (EnviroSim’s OT platform), respirometry-based calibration |
What’s New in BioWin 6.33 (and 6.x Series)
| Feature | Description |
|---|---|
| Enhanced Respirometry Integration | Improved calibration using OUR/AUR/NUR data for accurate kinetic parameter tuning; supports automation via Bio2Py scripting for petrochemical/industrial WWTPs |
| Anaerobic Modeling Refinements | Better ABR/anaerobic sludge blanket simulation (e.g., COD/TSS prediction within 13% of real data); expanded biogas flow and pH modeling |
| Visualization & Reporting | Upgraded Album tool for dynamic tables/charts; Excel/Word exports with scenario comparisons; graphical flowsheet editor for interactive unit connections |
| Control Simulation | BW Controller add-on for advanced strategies (e.g., aeration control, chemical dosing); evaluates online sensors for sustainable ops |
| Performance Tweaks | Faster large-scale simulations; reduced dependency on input data quality via default presets; minor bug fixes for MBR and urban WWTP scenarios |
| Academic/Commercial Modes | Strict licensing: Academic for education only; commercial for consulting/operation |