Creation Date: April 2, 2001

Summary: This document outlines changes / enhancements / fixes that have been incorporated in the latest version of BioWin (version 1.2.1). This document was written in response to queries we have had from customers who have received updates to older versions (e.g. versions 1.0.1, 1.0.1a, 1.1.0, 1.1.1, 1.1.2). To see which version of BioWin you have, start BioWin and choose the About... command from the Help menu.

Feature	Comments / Notes
Reporting Features	The latest release of BioWin incorporates powerful new reporting features to help you rapidly extract important information from your simulation sessions. With a single click, BioWin can generate a detailed printed report. The type of information that appears in the report is completely customizable. The general information that can be included in a report may be: Project information (user name, plant name, project name, etc.); A picture of the project flowsheet; Global model parameter values; Global temperature setting; Album pages (charts, tables, etc.); The SRT for the system (if one is available); Any notes that have been entered in the BioWin Notes editor; The reporting can be customized to include element-specific information on an element-type basis. Users can choose whether or not they want to include information for element types (e.g. Bioreactor) in the report. The type of information included in the report for each type of element can be different and may include: Physical data (volume, area, depth, # of diffusers, etc.); Operating data (average or flow-weighted average); Local settling parameters (if available); Local biological model parameters (if available); Aeration parameters (if available); If you prefer an electronic version, BioWin also can generate your report as a Microsoft Word™ document. Like the printed report, the information contained in the electronic version is completely customizable and may include many different forms. Once BioWin has generated the document for you, you may use it as a basis for an engineering report, or cut and paste its contents into another document. Related functionality includes the ability to print out all or ranges of the album pages. You can also set the number of album pages per printed page.
New Element: Variable Volume Grey Box Reactor	This new element adds dramatically increased flexibility to BioWin. This element may have variable volume, and it also allows users to specify their own custom models. Using this element's model editor (which has its own built in equation editor), you can specify any number of stoichiometry and rate expressions for processes acting on BioWin's state variables. You may add to the existing BioWin model, or define your own. You also may define your own constants for inclusion in your stoichiometry and rate expressions. Saving your custom models to disk and/or the model library allows you to share models amongst BioWin projects.
New Element: Anaerobic Digester	BioWin users may now incorporate anaerobic digestion into their process configurations using the anaerobic digester element. Use this element to estimate methane production, solids stabilization, and to investigate the effect of digester supernatant recycle.
New Element: Activated Primary Settling Tank	This element incorporates biological reaction into a primary settling tank. Using this element you can specify percent solids removal, underflow rates (constant or time-varying), and local temperature / kinetic parameters.
New Element: BOD Influent	This influent element allows users to enter influent data in terms of BOD, TSS, and VSS if they wish.
New State Variables / Processes	To allow anaerobic digestion modeling, a number of new state variables and processes have been added to BioWin. A key feature with regard to state variables is the inclusion of 4 user-defined variables. Another important inclusion is particulate organic phosphorus (Xop) which results in improved primary settling tank modeling. Some of the other new state variables include: Propionic Acid Acetogen Biomass Acetoclastic Methanogen Biomass Hydrogenotrophic Methanogen Biomass Propionic Acid COD Dissolved Hydrogen COD Precipitated Struvite Magnesium The total number of processes modeled by BioWin has increased from 31 to 47.
New Parameters	Two new parameters are now included in simulation results: Total Nitrogen (TN) and Total inorganic Nitrogen (TIN).
COD / VSS Ratio	Users may now specify the COD / VSS ratio for Xs and Xi (i.e. particulate COD) to give increased flexibility in calibrating the model to suspended solids data.
Expanded Documentation	The manual chapter on BioWin models has been greatly expanded to document the expanded biological model. The kinetics and stoichiometry of each process modeled by BioWin are listed. This chapter will give users a better understanding of the model structure. The model description shows users which state variables are involved in the various model processes. The manual sections on influent wastewater fractions have been expanded with increased documentation on the fractionation of influent nitrogen and phosphorus. Equations have been added to illustrate how BioWin wastewater fractions are applied in calculating the various nitrogen and phosphorus components.
Custom Database Export	Users now have increased control over exporting data that has been monitored during a dynamic simulation. If the user wishes, it is now possible to export data for particular state variables and parameters only. Also, the order in which the database columns are exported may be modified.
New Table Type: Unit Group Table	Previously, you only could include data for non-element-specific parameters in tables. For example, if you had a clarifier-type element in a table, it was not possible to include data for the Solids Loading Rate parameter as this parameter is specific to clarifiers. The Aeration Details Table overcame this problem for bioreactor-type elements (e.g. OUR, SOTE data). The new Unit Group Table extends this flexibility to all element types.
New Table Type: Mass Rate Table	This new table type displays mass rates for state variables and parameters of the users choice.
New Series Type: Current Value (by type)	Previously, you only could plot current value series containing data for non-element-specific parameters. This new type of series allows you to plot current value charts for parameters such as OUR, SLR, etc. This is an ideal method for displaying steady state simulation results.
Default Chart Line Thickness	The default new chart template has been expanded to include the facility to specify a default line thickness for line series plots.
Aeration Parameter Units	Units for aeration parameters are now displayed in the dialog box used to set parameter values.
Settling Velocity Switching Function	The maximum allowable settling velocity switch KS has been increased. This allows you to decrease sludge settling velocity at higher sludge concentrations.
GFX File Export	This utility allows users to export the contents of the BioWin database in GFX file format.