CONTINENTAL MARICULTURE SYSTEMS

Bert Wecker

0

10

20

30

40

50

60

70

80

90

100

0 1 2 3 4 5 6

Wat

er e

xch

ange

rat

e [%

/ h

ou

r]

Water circulation rate [fish basin volume / hour]

Standard

Trend RAS

0,0

0,5

1,0

1,5

2,0

0 2 4 6 8 10 12 14 16 18 20 22 24

Am

mo

nia

co

nce

ntr

atio

n [

mg

TAN

/ L

]

Time [hours]

Water flow rate [Flow through] [fish basin volume / hour]

0,0

0,5

1,0

2,0

3,0

0.5 kg feed / m³ fish basin volume

TAN 0,0 mg/L

Flow through TAN

1,0 mg/L

1 m³ / h

Fish basin 1 m³

TAN ?? mg/L

Recirculation TAN

?? mg/L Fish basin 1 m³

Biofilter ?? m³

1 m³ / h

0.5 kg feed / m³ fish basin volume

TAN 0,0 mg/L

Flow through TAN 1,0 mg/L

1 m³ / h

TAN 0,6 mg/L

Recirculation TAN

2,4 mg/L

Fish basin 1 m³

Fish basin 1 m³

Biofilter 3,0 m³

1 m³ / h

0.5 kg feed / m³ fish basin volume

0

1

2

3

4

5

6

0 1 2 3 4 5

TAN

co

nce

ntr

atio

n f

ish

bas

in [

mg

/ L]

Biofilter volume [m³]

Water flow rate 1,0 [fish basin volume / hour]

0.5 kg feed / m³ fish basin volume

TAN 0,5 mg/L

Recirculation TAN

0,7 mg/L Fish basin 1 m³

Biofilter 0,3 m³

4 m³ / h

TAN 0,7 mg/L

Recirculation TAN 1,3 mg/L Fish basin

1 m³ Biofilter 1,0 m³

2 m³ / h

0.5 kg feed / m³ fish basin volume

1000 100 1 10 0.1 0.01 Particle size (µm)

Coarse screen

Sedimentation

Micro screen

Granular filtration

Foam fractionation

Cartridge filter

Swirl separator

Particle

Colloides

Dissolved substances

Membrane filtration

Process water Sludge Foam

Drum filtration Skimmer

Two step solid separation

0

1

10

100

1.000

10.000

1101001.00010.000

Nit

roge

n c

on

cen

trat

ion

[m

g/L

]

Water exchange rate [% / day]

0.5 kg feed / m³ fish basin volume

Fish ► NH3

Nitrification

NH3 ► NO2 ► NO3

Denitrification

NO3 ► N2

Thank‘s for your attention.

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