ADM1 to ASM2d Translator

Introduction

A link is required to translate between biological based and physical or chemical mediated processes to develop plant-wide modeling of wastewater treatment. This model mediates the interaction between the Modified Anaerobic Digester Model 1 (ADM1) and the Modified Activated Sludge Model 2d (ASM2d).

The model relies on the following key assumptions:

• supports only liquid phase

• supports only Modified ADM1 to Modified ASM2d translations

Degrees of Freedom

The translator degrees of freedom are the inlet feed state variables:

• temperature

• pressure

• volumetric flowrate

• solute compositions

• cations

• anions

Ports

This model provides two ports:

• inlet

• outlet

Sets

Description	Symbol	Indices
Time	\(t\)	[0]
Inlet/outlet	\(x\)	[‘in’, ‘out’]
Phases	\(p\)	[‘Liq’]
Inlet Components	\(j_{in}\)	[‘H2O’, ‘S_su’, ‘S_aa’, ‘S_fa’, ‘S_va’, ‘S_bu’, ‘S_pro’, ‘S_ac’, ‘S_h2’, ‘S_ch4’, ‘S_IC’, ‘S_IN’, ‘S_IP’, ‘S_I’, ‘X_ch’, ‘X_pr’, ‘X_li’, ‘X_su’, ‘X_aa’, ‘X_fa’, ‘X_c4’, ‘X_pro’, ‘X_ac’, ‘X_h2’, ‘X_I’, ‘X_PHA’, ‘X_PP’, ‘X_PAO’, ‘S_K’, ‘S_Mg’]
Ion	\(j_{in}\)	[‘S_cat’, ‘S_an’] 1
Outlet Components	\(j_{out}\)	[‘H2O’, ‘S_A’, ‘S_F’, ‘S_I’, ‘S_N2’, ‘S_NH4’, ‘S_NO3’, ‘S_O2’, ‘S_PO4’, ‘S_K’, ‘S_Mg’, ‘S_IC’, ‘X_AUT’, ‘X_H’, ‘X_I’, ‘X_PAO’, ‘X_PHA’, ‘X_PP’, ‘X_S’]
Readily Biodegradable COD	\(r1\)	[‘S_su’, ‘S_aa’, ‘S_fa’]
Readily Biodegradable COD	\(r2\)	[‘S_va’, ‘S_bu’, ‘S_pro’, ‘S_ac’]
Slowly Biodegradable COD	\(s\)	[‘X_ch’, ‘X_pr’, ‘X_li’]
Unchanged Components	\(u\)	[‘S_I’, ‘X_I’, ‘X_PP’, ‘X_PHA’, ‘S_K’, ‘S_Mg’, ‘S_IC’]
Zero Flow Components	\(z\)	[‘S_N2’, ‘S_NO3’, ‘S_O2’, ‘X_AUT’, ‘X_H’, ‘X_PAO’]

Notes

¹ “Ion” is a subset of “Inlet Components” and uses the same symbol j_in.

Equations and Relationships

Description	Equation
Volumetric flow equality	\(F_{out} = F_{in}\)
Temperature balance	\(T_{out} = T_{in}\)
Pressure balance	\(P_{out} = P_{in}\)
Fermentable substrate conversion	\(S_{F, out} = Σ_{r1} C_{r1, in}\)
Acetic acid conversion	\(S_{A, out} = Σ_{r2} C_{r2, in}\)
Unchanged component conversions	\(C_{u, out} = C_{u, in}\)
Ammonium conversion	\(S_{NH4, out} = S_{IN, in}\)
Phosphate conversion	\(S_{PO4, out} = S_{IP, in}\)
Biodegradable particulate organics conversion	\(X_{S, out} = Σ_{s} C_{s, in}\)
Zero-flow component conversions	\(C_{z, out} = 0\)

Classes

class watertap.unit_models.translators.translator_adm1_asm2d.TranslatorDataADM1ASM2D(component)

Translator block representing the ADM1/ASM2D interface

build()

Begin building model. :param None:

Returns:

None

initialize_build(state_args_in=None, state_args_out=None, outlvl=0, solver=None, optarg=None)

This method calls the initialization method of the state blocks.

Keyword Arguments:

• state_args_in – a dict of arguments to be passed to the inlet property package (to provide an initial state for initialization (see documentation of the specific property package) (default = None).

• state_args_out – a dict of arguments to be passed to the outlet property package (to provide an initial state for initialization (see documentation of the specific property package) (default = None).

• outlvl – sets output level of initialization routine

• optarg – solver options dictionary object (default=None, use default solver options)

• solver – str indicating which solver to use during initialization (default = None, use default solver)

Returns:

None

References

[1] Flores-Alsina, X., Solon, K., Mbamba, C.K., Tait, S., Gernaey, K.V., Jeppsson, U. and Batstone, D.J., 2016. Modelling phosphorus (P), sulfur (S) and iron (Fe) interactions for dynamic simulations of anaerobic digestion processes. Water Research, 95, pp.370-382.