BioWin3® – An Introduction

Michael D. Doran, P. E. DEEAdjunct Professor of Civil & Environmental Engineering

CEE 426

Presentation Outline• What is BioWin3®?• What can BioWin3® be used for?• How does BioWin3® work?• Some Examples• Cautions Using BioWin3® • Class Exercise

BioWin3® is Powerful WWTP Process Simulation Software

BioWin3® is microcomputer-based wastewater treatment plant process software that allows integrated steady state or dynamic unit process simulations.

According to EnviroSim Associates, Ltd., BioWin3® is the world-wide leader in WWTP simulator software.

BioWin3® Is Useful for:• Integrated “Mass Balance” Approach, Including

Sidestream Impacts• Preliminary Analysis of Various Processes for

Planning Purposes• Detailed Analysis of Unit Process Sizing and

Configuration during Design• Analysis of Diurnal Loads, Peak Wet Weather, Solids

Processing, etc., on Treatment Performance• Evaluating SRT, Temperature, Other Factors• Estimating Raw Solids Generation, Biosolids Process

Loadings, Stabilized Biosolids Generation

BioWin3® Includes Robust Models

• IAWQ Extended (for BNR) Activated Sludge• Fermentation• Poly P Organisms• Anaerobic Autotrophic (methane formers)• Clarifier Hindered Settling-Thickening• Clarifier Biological Activity• Oxygen Transfer

e.g.

Model Documentation can be Found in Literature

• General Model for Biological Nutrient Removal Activated Sludge Systems: Model Presentation, P.S. Barker and P.L. Dold, Water Environment Research, vol. 59, no. 5. 1997, p. 969.

• General Model for Biological Nutrient Removal Activated Sludge Systems: Model Application, P.S. Barker and P.L. Dold, Water Environment Research, vol. 59, no. 5. 1997, p. 985.

• COD and Nitrogen Mass Balances in Activated Sludge Systems, P.S. Barker and P.L. Dold, Water Research, vol. 29, no. 2, 1995, p. 633.

• An Introduction to Process Modeling for Designers, Water Environment Federation MOP 31, 2009.

e.g.

BioWin3® Uses an Effective Human Interface

Interface

Modeling Engine

Simulator Output ManagementGraphsTables

Configuration

Kinetic Parameters

Influent Characteristics

Performance Factors

The Configuration Screen is Used to Describe the Modeled System

BioWin3® Simulation Configured From ElementsInfluent Element

Clarifier Elements

Reactor Elements

Effluent Elements

Mixer Element

Anaerobic Digester Element

Splitter Element

Primary Clarifier Element

Pipe Element (typ)

BioWin3® Contains Useful Controls and Tools

• SRT Wasting Control For Act Sldg• Can Consider (or not) Clarifier Sludge Blanket,

Non-Aerated MLSS, etc., in Biomass Inventory for F/M or SRT

• Global Temperature (or can be set “locally”)• Simulation (Monitoring) and Tabular or Graphical

Output Formats; Export Utility• “Point and See” Information• Documentation Output Report to “WORD” or

PDF

Simulations Can Be Simple

Simulations Can Be Complex

Example – How Does the Model Predict Real Plant Performance?

Beloit WI WWTP Activated Sludge System

~3.0 hr HRT ~23 hr HRT

~ 8 d SRT

Example – 2008 Monthly Avg Beloit Data Used

Beloit WI WWTPInfluent Concentrations

0

100

200

300

400

500

600

700

0 2 4 6 8 10 12

Month (2008)

COD

and

TSS

(mg/

L)

0

10

20

30

40

50

60

70

TKN

and

P (m

g/L)

PRE COD

PRE TSS

PRE TKN

PI P

Example – BioWin3 Model Predicts Beloit Effluent Pretty Well

Default BioWin3 Coefficients Used for Model.

Beloit WI WWTPEffluent CBOD Concentrations

0123456789

0 2 4 6 8 10 12 14

Months (2008)

CBO

D (m

g/L)

PE CBOD Data

PE CBOD Model

Example – BioWin3 Model Predicts Beloit Effluent Pretty Well

Default BioWin3 Coefficients Used for Model.

Beloit WI WWTPEffluent TSS Concentrations

0123456789

0 2 4 6 8 10 12 14

Months (2008)

TSS

(mg/

L)

PE TSS Data

PE TSS Model

Example – BioWin3 Model Predicts Beloit Effluent Pretty Well

Beloit WI WWTPEffluent NH3N Concentrations

0.000.200.400.600.801.001.201.401.601.802.00

0 2 4 6 8 10 12 14

Months (2008)

NH3N

(m

g/L)

PE NH3N Data

PE NH3N Model

Default BioWIn3 Coefficients Used for Model.

Example – BioWin3 Model Predicts Beloit Effluent Pretty Well

Beloit WI WWTPEffluent P Concentrations

0.00.20.40.60.81.01.21.41.61.8

0 2 4 6 8 10 12 14

Months (2008)

Tota

l P (m

g/L)

PE P Data

PE P Model

Default BioWin3 Coefficients Used for Model.

Example 2 – Final Clarifier Performance vs. Loading Rate

Variable Infl Flowrate

500 gpd/sq ft800 gpd/sq ft

1,000 gpd/sq ft1,200 gpd/sq ft

Average OFR Values:

Example 2 – Flow Input of Typical Diurnal Pattern Used

Example 2 - TSS from Clarifiers

Example 2 - Effluent TSS Deteriorates at OFR above ~1,000 gpd/sq ft

Sludge Blanket “Blooms” at SLR above ~26 lb/d/sq ft

Close-up of Blanket Height Output from Simulation

Example 3 – Plant Mass Balance

Recycle Quantities (% of Infl):

Q=8.4% CBOD=5.6% TSS=18.3% TKN=19.2% TP=121%

Simulator Can Help Answer Key Design Questions

• What process, reactor sizings, recycle rates, etc. are best for my application?

• What Raw Sludge Loading to digestion can I expect During Peak Week and Peak Month Conditions?

• What Aeration Capacity is needed for Peak Conditions? What is the best Aeration tapering scheme?

• What SRT is best for different seasonal conditions?• What impact do Sidestreams have on performance of other

units?• How does my proposed design respond to seasonal

temperature variations, diurnal and peak loadings?• How does the proposed design handle wet weather I/I inputs

from severe storms?• etc., etc., etc.

BioWin3® Should Be Used with Care

• Study Workbooks and Do Tutorial Examples.• Carefully Complete All Input Screens for Element Properties.• Think About Information Needed; Construct Graphs or Tables

in “Album” for Desired Output.• Simulate Critical Cases (e.g., Peak Hr, Peak Day, Peak

Week, Critical Temperatures).• Keep Log of “Runs” and Save Files with Logical Name.• Ask Questions – I Have Found EnviroSim Staff to Be Very

Helpful!• Default Model Parameters have been Carefully Researched

by EnviroSim (for domestic wastewater), but May Not Apply to Your Case; Use Careful and Conservative Approach to Planning and Design; Calibrate model to specific wasteswater if necessary.

Questions-Discussion

Let’s Build This Simple Simulation