development of a generalist, integrative and predictive ......tankid specie occupation grow absorb...

Development of a generalist, integrative

and predictive model for aquaponics

Benoît Stalport 20/11/2019

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NUMERICAL

MODEL

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What are models ?

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« All models are wrong, but some are useful » - George Box

Model VS Measurements

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• Balance equations are based on two fundamental principles of

thermodynamics : the mass conservation and the energy conservation

• « Nothing is created, nothing is lost, all is transformed »

𝑑𝑚

𝑑𝑡= 𝑄𝐼𝑁 - 𝑄𝑂𝑈𝑇 + 𝑄𝑁𝑃

SYSTEM

𝑄𝐼𝑁 𝑄𝑂𝑈𝑇𝑚𝑆𝑌𝑆

𝑄𝑁𝑃𝑊ℎ𝑒𝑟𝑒:

Q =dm

dt

𝑑𝑡 → 0

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Fish

Plants

Water

Water

Atmosphere

Bacteria

Aquaponic system =

= any object with a mass

= Q = dm/dt

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Individual-Based

Plants species

Fish species

Predictive

Accurate

Compatible with the app

Modular and generalist

Methods

Attributes

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Methods

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PlantObject

ID

TankID

Age

FruitMass

PlantMass

LeafArea

LightIntensity

Specie

Introduce

Sell

Grow

Absorb

Transpirate

PumpObject

ID

FromTankID

ToTankID

MaxFlowRate

Configuration

Consumption

State

Activate

Deactivate

+ Feedings, Chemicals, Electrics,

etc.

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BactPopObject

ID

TankID

Specie

Occupation

Grow

Absorb

Excrete

TankObject

ID

RoomID

Capacity

Volume

FreeSurface

InsideSurfaces

UnitLiterPrice

ChemicalsConc.

pH

DO

EC

Temperature

LiterPrice

RoomObject

ID

Temperature

RH

CO2

WindSpeed

FishObject

ID

TankID

Age

Mass

Length

Specie

Introduce

Sell

Eat

Grow

Excrete

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Plants growth Evapotranspiration Fish growth

Economics EnergyMicrobiology Nutrients

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Modelled nutrients concentrations in the fish tank

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We need DATA !

Interested in beta-testing ? pierre.raulier@uliege.be

CALIBRATION VALIDATION

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- Thank you -

Benoît Stalport

b.stalport@uliege.be