Configure a wastewater Fluid Type

These Fluid Types use Wastewater as their Thermo Type.

Waterwater Fluid Types use the Electrolyte NRTL (eNRTL) method to calculate the vapor-liquid equilibrium. You currently cannot change the thermodynamic method for a wastewater Fluid Type.

Important: Currently, the Component Browser does not display any components for wastewater Fluid Types. Therefore, you cannot add components to a wastewater Fluid Type unless you know the exact name of the component in the default System:SIMSCI pure component data bank. We recommend that you create a copy of a wastewater Fluid Type from the Wastewater Library instead of creating a wastewater Fluid Type from scratch. The Fluid Types in the Wastewater Library should contain all the components that you need to simulate municipal wastewater fluids.

Configure a wastewater Fluid Type

1. Open the Fluid Type in the Fluid Editor.

2. Expand the System section.

3. (Optional) Select the Use Henry's Law checkbox to calculate the fugacity of supercritical gasses by using Henry's Law. Otherwise, clear the checkbox.

   The Henry column appears in the Component List section when you select the Use Henry's Law checkbox. You must select the checkbox in this column for each component that you want to use as a solute component. AVEVA Process Simulation automatically designates components with critical temperatures less than 400 K as solute components. Please see the AVEVA Process Simulation Thermodynamics Reference Guide for more information on Henry's Law.

4. (Optional) Select the Include non-equilibrium solid components checkbox to include any solid components in the composition calculations of the liquid phase. See Specify components as solids in a compositional Fluid Type for more information.

5. (Optional) Add components to the Fluid Type as needed and specify any required data.

   Because the Component Browser currently does not display any components, we recommend that you create a copy of a wastewater Fluid Type from the Wastewater Library instead of creating a wastewater Fluid Type from scratch. In this case, the Fluid Type should already contain the components needed to simulate the desired municipal wastewater fluid. However, you can add additional components if you know the exact name of the component in the default System:SIMSCI pure component data bank.

6. Expand the Models section.

7. In the Fractionation box, enter the full name of the submodel that you want to use for the fractionation calculations in the Fluid Type.

   The default submodel is Wasterwater.DefFractionation.

8. In the Aeration box, enter the full name of the submodel that you want to use for the aeration calculations in the Fluid Type.

   The default submodel is Wastewater.DefAeration.

9. In the Stream pH box, enter the full name of the submodel that you want to use for the pH calculations in the Fluid Type.

   This box is blank by default.

10. In the Reaction box, enter the full name of the reaction submodel that you want to use to calculate changes in biomass and substrates in any wastewater reactors (such as an AerationTank or AnoxicTank) that use this Fluid Type.

    If you enter the Wastewater.ASM3Modular submodel in the Reaction box, you can also specify individual reaction submodels for the base reactions, N2O production reactions, phosphorous removal reactions, and CO2 production reactions.

11. If you entered the Wastewater.ASM3Modular submodel in the Reaction box, do the following:

    1. In the Base reaction box, enter the full name of the reaction submodel that you want to use to calculate basic changes in biomass and substrates.

       Typically, this reaction submodel does not account for any N2O production, phosphorous removal, or CO2 production. You can use the standard Wastewater.ASM3Base submodel or your own customized reaction submodel.

       You can set this value to Wastewater.NoRxn to turn off biomass and substrate changes in a wastewater reactor.

    2. In the N2O production reaction extension box, enter the full name of the reaction submodel that includes calculations for N2O production from the biological reactions.

       You can use the standard Wastewater.ASM3N2OExt submodel or your own customized reaction submodel. You can also use the Wastewater.ASM3GHG submodel, which includes calculations for both N2O production and CO2 production. If you use the Wastewater.ASM3GHG submodel, then you do not need to specify a reaction submodel in the CO2 production reaction extension box.

       You can set this value to Wastewater.NoRxn to turn off N2O production reactions in a wastewater reactor.

    3. In the Phosphorous removal reaction extension box, enter the full name of the reaction submodel that includes calculations for phosphorous (typically ortho-phosphate) removal from the biological reactions.

       You can use the standard Wastewater.ASM3PExt submodel or your own customized reaction submodel.

       You can set this value to Wastewater.NoRxn to turn off phosphorous removal reactions in a wastewater reactor.

    4. In the CO2 production reaction extension box, enter the full name of the reaction submodel that includes calculations for CO2 production from the biological reactions.

       You can use the standard Wastewater.ASM3CO2Ext submodel or your own customized reaction submodel. You can also use the Wastewater.ASM3GHG submodel, which includes calculations for both N2O production and CO2 production. If you use the Wastewater.ASM3GHG submodel, then you do not need to specify a reaction submodel in the N2O production reaction extension box.

       You can set this value to Wastewater.NoRxn to turn off CO2 production reactions in a wastewater reactor.