Aquaponic research at University Rostock

21 Pages·2016·4.21 MB·English

Europäischer Fischereifonds
Projekt:
Aquaponic research at University Rostock
(Fac. Agricultural and Environmental Sciences)
Harry W. Palm
U.Knaus & S. Strauch
23.03.2016 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN
Background
Rostock
 Lowest populated state in Germany
 Dominated by farmers, less industry
 Tourist destination No. 1
 540 biogas plants (warm water available)
 Commercial African catfish production since 7
years, appr. 1000 to mainly by farmers
 State policy to increase aquaculture production
 BUT: No access to surface water
 Prevention of effluent water
Nitrate in ground water and into the Baltic Sea
 Knowledge based combination of commercial
aquaculture and plant cultivation (aquaponics)
23.03.2016 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN 2
The problem
 Aquaponic literature scarce
 Mainly from small scale experimental
systems
 Data not comparable
 Not originating from „commercial farms“
 Access to commercial farms very limited
 Literature not public domain
 General statement „Aquaponics in Germany
economical NOT sustainable“ (HOW DO
THEY KNOW ?)
 How to give recommendations concernring
aquaponics to investors/farmers ?
23.03.2016 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN 3
Cucumber after 70 days
23.03.2016 © 2014 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN
O. niloticus – C. carpio
Spring - Summer
Cucumber, Tomato, Salat
nitrate [mg l-1]
25
20
1] 15 Effects:
-l g
m
[ e 10
ta
r
tiN ● Consumption of nitrate in both
5
cycles
0
0 10 20 30 40 50 60 70
Day [d]
● Cleaning the process water in
cycle I cycle II
both species
Knaus, U. & Palm, H.W. (submitted): Effects of the fish biology on aquaponical cultured
vegetables under optimal conditions.
27.11.2015 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN 5
The Aquaponic factor (AF)
● Fish species decides onto plant growth under identical cultivation conditions
● Plant growth performed best with O. niloticus
● Plant growth in Kombination with Cyprinus carpio was less than combined with O. niloticus
● Growth of C. gariepinus was better than carp and tilapia
experiments
) Experiment I Experiment II Experiment III Experiment IV
“
0„ (Palm et al., 2014b) (Knaus & Palm, 2015) (Knaus & Palm, 2015) (Knaus & Palm, 2015) independent
(
r
o
t
k
a
fs
m
u
t
s
h
c
a
W
n Mint 2 x
e
la Better growth
e
di m with Tilapia
o compared with carp
v
g
n
u
h
c
ie
w
b
A
Basil better, not
Aquaponical cultivatedspecies significant growth
with carp compared
Berechnung: AF = (Biomasse Fisch 1 / Biomasse Fisch 2)-1 und vice versa with Tilapia
Fisch
bzw. AF = (Biomasse Pflanze 1 / Biomasse Pflanze 2)-1 und vice versa
Pflanze
2273..1013..22001156 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN 66
Pilot project: Commercial aquaponics possible in MV ?
Palm et al. (2014a)
23.03.2016 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN 7
Frequently asked questions
 Can we combine commercial African
catfish production with commercial
plant cultivation ?
 Which plant species can be used ?
 Investment costs ?
 Labor costs reasonable ?
 Technical adjustments neccessary ?
 Nutrient flows ?
 Education level of labor force ?
 Product quality ? Does a cucumber
smells fishy ??
 Scientific support in the case of an
investment ?
23.03.2016 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN 8
The FishGlassHouse (Aquaculture & Hydroponics)
 3 aquaculture units
 6 hydroponic units
 construction as coupled & decoupled systems
23.03.2016 © 2009 UNIVERSITÄT ROSTOCK| FAKULTÄT AGRAR-UND UMWELTWISSENSCHAFTEN 9
The FishGlassHouse
Fish stocked (50, 100, 200
kg staggered) in Juli 2015,
opened in 27.11.2015
23.03.2016 © 2009 UNIVERSITÄT ROSTOCK 10