ADM1 to ASM1 Translator

Introduction

A link is required to translate between biological and physically- or chemically-mediated processes to develop whole-plant modeling of wastewater treatment. This model mediates the interaction between the Anaerobic Digester Model 1 (ADM1) and the Activated Sludge Model 1 (ASM1).

The model relies on the following key assumptions:

• supports only liquid phase

• supports only ADM1 to ASM1 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	\(j\)	[‘H2O’, ‘S_su’, ‘S_aa’, ‘S_fa’, ‘S_va’, ‘S_bu’, ‘S_pro’, ‘S_ac’, ‘S_h2’, ‘S_ch4’, ‘S_IC’, ‘S_IN’, ‘S_I’, ‘X_c’, ‘X_ch’, ‘X_pr’, ‘X_li’, ‘X_su’, ‘X_aa’, ‘X_fa’, ‘X_c4’, ‘X_pro’, ‘X_ac’, ‘X_h2’, ‘X_I’, ‘S_cat’, ‘S_an’, ‘S_co2’]
Ion	\(j\)	[‘S_cat’, ‘S_an’] *
Outlet Components	\(j\)	[‘H2O’, ‘S_I’, ‘S_S’, ‘X_I’, ‘X_S’, ‘X_BH’, ‘X_BA’, ‘X_P’, ‘S_O’, ‘S_NO’, ‘S_NH’, ‘S_ND’, ‘X_ND’, ‘S_ALK’]
Readily Biodegradable COD	\(k\)	[‘S_su’, ‘S_aa’, ‘S_fa’, ‘S_va’, ‘S_bu’, ‘S_pro’, ‘S_ac’]
Slowly Biodegradable COD	\(m\)	[‘X_c’,’X_ch’, ‘X_pr’, ‘X_li’, ‘X_su’, ‘X_aa’, ‘X_fa’, ‘X_c4’, ‘X_pro’, ‘X_ac’, ‘X_h2’]

Notes

^* Ion” is a subset of “Component” and uses the same symbol j.

ADM1 Components

Additional documentation on the ADM1 property model can be found here: Anaerobic Digestion Model 1 Documentation

Description	Symbol	Variable
Monosaccharides, S_su	\(S_{su}\)	S_su
Amino acids, S_aa	\(S_{aa}\)	S_aa
Long chain fatty acids, S_fa	\(S_{fa}\)	S_fa
Total valerate, S_va	\(S_{va}\)	S_va
Total butyrate, S_bu	\(S_{bu}\)	S_bu
Total propionate, S_pro	\(S_{pro}\)	S_pro
Total acetate, S_ac	\(S_{ac}\)	S_ac
Hydrogen gas, S_h2	\(S_{h2}\)	S_h2
Methane gas, S_ch4	\(S_{ch4}\)	S_ch4
Inorganic carbon, S_IC	\(S_{IC}\)	S_IC
Inorganic nitrogen, S_IN	\(S_{IN}\)	S_IN
Soluble inerts, S_I	\(S_I\)	S_I
Composites, X_c	\(X_c\)	X_c
Carbohydrates, X_ch	\(X_{ch}\)	X_ch
Proteins, X_pr	\(X_{pr}\)	X_pr
Lipids, X_li	\(X_{li}\)	X_li
Sugar degraders, X_su	\(X_{su}\)	X_su
Amino acid degraders, X_aa	\(X_{aa}\)	X_aa
Long chain fatty acid (LCFA) degraders, X_fa	\(X_{fa}\)	X_fa
Valerate and butyrate degraders, X_c4	\(X_{c4}\)	X_c4
Propionate degraders, X_pro	\(X_{pro}\)	X_pro
Acetate degraders, X_ac	\(X_{ac}\)	X_ac
Hydrogen degraders, X_h2	\(X_{h2}\)	X_h2
Particulate inerts, X_I	\(X_I\)	X_I
Total cation equivalents concentration, S_cat	\(S_{cat}\)	S_cat
Total anion equivalents concentration, S_an	\(S_{an}\)	S_an
Carbon dioxide, S_co2	\(S_{co2}\)	S_co2

NOTE: S_h2 and S_ch4 have vapor phase and liquid phase, S_co2 only has vapor phase, and the other components only have liquid phase. The amount of CO2 dissolved in the liquid phase is equivalent to S_IC - S_HCO3-.

ASM1 Components

Additional documentation on the ASM1 property model can be found here: Activated Sludge Model 1 Documentation

Description	Symbol	Variable
Soluble inert organic matter, S_I	\(S_I\)	S_I
Readily biodegradable substrate S_S	\(S_S\)	S_S
Particulate inert organic matter, X_I	\(X_I\)	X_I
Slowly biodegradable substrate X_S	\(X_S\)	X_S
Active heterotrophic biomass X_B,H	\(X_{B,H}\)	X_BH
Active autotrophic biomass X_B,A	\(X_{B,A}\)	X_BA
Particulate products arising from biomass decay, X_P	\(X_P\)	X_P
Oxygen, S_O	\(S_O\)	S_O
Nitrate and nitrite nitrogen, S_NO	\(S_{NO}\)	S_NO
NH4 \(^{+}\) + NH \(_{3}\) Nitrogen, S_NH	\(S_{NH}\)	S_NH
Soluble biodegradable organic nitrogen, S_ND	\(S_{ND}\)	S_ND
Particulate biodegradable organic nitrogen, X_ND	\(X_{ND}\)	X_ND
Alkalinity, S_ALK	\(S_{ALK}\)	S_ALK

Equations and Relationships

Description	Equation
Pressure balance	\(P_{out} = P_{in}\)
Temperature balance	\(T_{out} = T_{in}\)
Volumetric flow equality	\(F_{out} = F_{in}\)
Inert soluble COD balance	\(S_{I, out} = S_{I, in}\)
Inert particulate COD balance	\(X_{I, out} = X_{I, in}\)
Soluble biodegradable COD balance	\(S_{S, out} = S_{su, in} + S_{aa, in} + S_{fa, in} + S_{va, in} + S_{bu, in} + S_{pro, in} + S_{ac, in}\)
Particulate biodegradable COD balance	\(X_{S, out} = X_{c, in} + X_{ch, in} + X_{pr, in} + X_{li, in} + X_{su, in} + X_{aa, in} + X_{fa, in} + X_{c4, in} + X_{pro, in} + X_{ac, in} + X_{h2, in}\)
Inorganic nitrogen balance	\(S_{NH, out} = S_{IN, in}\)
Organic nitrogen balance	\(S_{ND, out} = (S_{I, in} * N_i) + (S_{aa, in} * N_{aa})\)
Particulate organic nitrogen balance	\(X_{ND, out} = N_{bac} * (X_{su, in} + X_{aa, in} + X_{fa, in} + X_{c4, in} + X_{pro, in} + X_{ac, in} + X_{h2, in}) + N_i * X_{I, in} + N_{xc} * X_{c, in} + N_{aa} * X_{pr, in} - x_{ie} * X_{I, in}\)
Alkalinity equation	\(S_{ALK, out} = S_{IC, in}\)

Classes

class watertap.unit_models.translators.translator_adm1_asm1.TranslatorDataADM1ASM1(component)

Translator block representing the ADM1/ASM1 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] Copp J. and Jeppsson, U., Rosen, C., 2006. Towards an ASM1 - ADM1 State Variable Interface for Plant-Wide Wastewater Treatment Modeling. Proceedings of the Water Environment Federation, 2003, pp 498-510. https://www.accesswater.org/publications/proceedings/-290550/towards-an-asm1—adm1-state-variable-interface-for-plant-wide-wastewater-treatment-modeling