1. Aquaponics for safe food production and
environmental sustainability
Md. Mosharraf Hossain
PhD Fellow
Roll No.: 02
Reg. No.: 48594
Session: 2017/18
Presented by:
Department of Aquaculture
Bangladesh Agricultural University
Mymensingh
2. Supervisory Committee
Dr. Md. Abdus Salam
Supervisor Professor
Department of Aquaculture, BAU, Mymensingh
Dr. Tanvir Rahman
Co-Supervisor Associate Professor
Department of Aquaculture, BAU, Mymensingh
Dr. Gias Uddin Ahmed
Member Professor
Department of Aquaculture, BAU, Mymensingh
3. Presentation Outline
Background with
Justification
Objectives
Materials and Methods
Expected Outcomes
Activity Planning
Time Schedule
4. Background with Justification
The human population worldwide currently
exceeds 7 billion, and it is projected to reach
8.5 billion by 2030, and 9.7 billion by 2050
(UN, 2016).
Fish production increased both nationally as
well as globally. Bangladesh is now in 3rd
position among the fish producing countries
in the world after China and India
(FAO, 2018);
Production of safe food for huge population
has become the burning question at the
present era;
Bangladesh is a small but highly disaster
prone country with huge population
Pond based aquaculture is being intensified
but flood and cyclones sweep away the crops
and farmers incurred huge loss in every year.
Source: The Daily Prothom Alo (14.07.2018)
5. Background with Justification (Contd..)
On the other hand, massive croplands are being
converted to other uses every day that is also
creating pressure on natural resources;
To keep pace with the growing food demand,
farmers using various chemicals to boost up
cereal production that creates human health
hazards as well as environmental problems around
the world;
For taking these chemically enriched foods,
people are suffering from various harmful
diseases;
These activities have adverse impacts on
surrounding aquatic ecosystems- such as loss of
biodiversity, habitat destruction and hampered
breeding etc;
6. Background with Justification (Contd..)
Moreover, the production cost of fish and
vegetables getting higher and higher
everyday;
In this situation we need such a climate
smart and eco-friendly and sustainable
technology for food production which can
handle current problems efficiently;
Aquaponics is such type of technology which
can produce relatively safe food (fish and
vegetables) and keep the environment
hazard-free
It is an environmental friendly, climate-
smart and sustainable food production
system which can able to handle water
scarcity, soil degradation, climate change and
environmental pollution through producing
safe food for ever increasing world
population (Salam et al., 2014).
7. What is Aquaponics?
‘Aquaponics is the art of
growing food with fish poop’,
(Anonymous)
“Essentially, all life depends upon the soil
... There can be no life without soil and no
soil without life; they have evolved
together.” Charles E. Kellogg
An integration of two systems:
Hydroponics and Aquaculture
Background with Justification (Contd..)
8. Background with Justification (Contd..)
Why aquaponics?
• Reduced labour ;
• Higher production rate in limited space;
• No chemical fertilizer or pesticidies are used;
• Zero water exchange;
• Aquacultural waste products are used;
• Provides income from two separate products;
• Year round production can be possible;
• Can be used in underground and indoors; and
• Works in draught or places with poor soil
quality.
9. Background with Justification (Contd..)
Environmental, economic and social impacts of aquaponics
Category Impacts
Environmental
(1) Use and recycling of water resources;
(2) Energy consumption & production;
(3) Recycling of organic waste ; and
(4) New landscape opportunities.
Economical
(1) Increased food production;
(2) Allows for the utilization of labor and land of elderly and
house wives; and
(3) Using the waste stream to provide total energy needs of an
aquaponics system.
Social
(1) Improving community food security;
(2) Providing a source of relatively cheap protein; and
(3) Important to low-income individuals in both developing and
developed countries.
10. Why aquaponics Considered Sustainable?
Waste from fish is used to feed the plants;
Fish and plants create a symbiotic relation;
Water is re-used in this system;
Local food production enhances the local
economy and reduces food transportation
costs; and
Continuous supply of organic fertilizer.
13. Background with Justification (Contd..)
Types of Aquaponic
System
Deep water culture (DWC)
systems
Nutrient film technique
(NFT)
Media-filled bed systems
(Flood and Drain Systems)
15. Background with Justification (Contd..)
Several research have done on design,
production performances of fish and vegetables,
feasibility of different types of aquaponics etc. at
home and abroad;
In Bangladesh, most of the research works on
aquaponics have done by Prof. Dr. M A Salam,
BAU, Mymensingh. No specific works have done
on the sustainability of aquaponics addressing
bacteriological profile of aquaponically grown
products in Bangladesh;
Therefore, this research will be undertaken for
developing a cost effective aquaponic system to
produce safe food by utilizing rooftop or
backyard and fallow land to improve human
health and reduce environmental hazards;
16. Objectives of the Study
Broad Objective
The proposed research aims to
conduct for developing a cost
effective aquaponic system to
produce fish and organic vegetables
addressing bacteriological profile that
will mitigate the increasing demand
of safe food and environmental
sustainability.
17. Objectives (contd..)
Specific Objectives
• To optimize stocking density of fish and vegetables in aquaponic system;
• To assess the changes of water quality parameters;
• To evaluate the growth and production performances of fish and
vegetables;
• To measure the availability of nutrients and uptake by the plants;
• To identify the presence of bacterial pathogens and their abundance;
• To evaluate the cost-benefit ratio of aquaponic system; and
• To disseminate the developed aquaponic technology through extension
materials, trainings, workshops, demonstration and utilizing mass media.
18. Materials and Methods
Study Site
The study will be conducted at BAU Aquaponics Oasis, Department of
Aquaculture, Faculty of Fisheries, Bangladesh Agricultural University
(BAU), Mymensingh.
Laboratory to be used
Water quality tests, proximate analysis for feed, fish and vegetables,
bacteriological study of tank water and vegetables and nutrient analysis will be
done at Central Lab, Aquaponics, Fish Nutrition and Fish Disease Lab of
Bangladesh Agricultural University (BAU), Mymensingh.
19. Aquaponic Components
• Fish tank (300 L)
•Plants grow bed
• submersible pump
• Air pump
• Air stone
•Irrigation tubes
•Water heater
•Filter
•Fish and plants
Materials and Methods (Contd…)
20. Materials and Methods (Contd…)
Experimental design
The experimental design will be
comprised of twelve fish tanks (300 L
each) of containing 200 L water and
twelve food grade plastic containers
(99.5×57×21 cm3) for vegetables bed.
Four treatments will be used and each
treatment containing three replications.
Culture system
Media based aquaponics system.
21. Water quality Tests
Water quality will measure every 15 days interval during
study period
Growth study
Sampling will be done fortnightly for fish growth check;
Weight gain, SGR, FCR, Condition Factor will be
recorded;
Bacteriological Studies
Bacteriological studies will be performed fortnightly;
Bacteriological analysis will be done to ensure the
presence and abundance of bacterial pathogens
particularly E. coli and Salmonella sp. in aquaponic
system.
Materials and Methods (Contd…)
22. Experiment -01: Feasibility of tilapia and strawberry
production in media based aquaponic system
Background
Strawberry (Fragaria sp.) is a sodium-free, fat-free,
cholesterol-free and low-caloric food. These can able to
protect heart, increase HDL (good) cholesterol, lowering blood
pressure, and guard against cancer;
Many people tried to cultivate strawberries in aquaponics
without success because of failing to monitor the water quality
properly. While the plants need nitrates to survive, the high levels
of ammonia that can quickly kill them off;
To ensure a good growth rate of strawberry plants demanding
for the levels of N P K are 9-2.8, 25-0.4 and 6-2.5 ppm
respectively;
Soilless culture is a new method for the cultivation of the plants
in Bangladesh. Urban peoples paying their interest to grow
strawberry at roof top;
Thus, this experiment will be conducted to determine the
production capacity of tilapia and strawberry in media based
aquaponic system
23. Objectives
To see the feasibility of tilapia and strawberry production in media based
aquaponic system;
To assess the changes of water quality parameters in aquaponic system; and
To notify the presence and abundance of bacterial pathogens in the aquaponic
systems;
Tested crops
Fish : Tilapia
Fruit Crop : Strawberry
Treatment Tilapia
fingerlings/200L
water
Replications No. of strawberry
saplings
T1 50
3 8
T2 60
T3 70
T4 80
Experimental
design
Experiment -01 (Contd…….)
25. Experiment - 1 (Contd…)
Preparation of fish tank and vegetables bed
26. Stocking of fish fry and planting
vegetable saplings
Healthy tilapia fry will purchase from local
hatchery of Mymensingh region;
Strawberry saplings will collect from Rajshahi
before stocking of fish.
Feeding
Commercial floating feed containing 30% protein
supplied twice daily at the rate of 3% for first
month, 2% for second month and 1.5% of body
weight for rest of the time.
Experiment - 1 (Contd…)
27. Parameter to be studied
Water analysis
Water temperature,
pH, DO, EC, TDS, nitrite,
nitrate, phosphate and
Ammonia
Chemical Analysis
• Availability of
nutrients, nutrients
uptake by plants,
proximate analysis of
fish, feed and
aquaponically grown
products;
Growth performance
& Survival rate
Body weight gain,
percent weight gain,
specific growth rate,
food conversion ratio,
food conversion
efficiency, protein
efficiency ratio (PER)
and percent survival
rate
Sampling
Sampling will be done fortnightly for fish growth check, water quality,
nutrient analysis and bacteriological study
28. Isolation and identification of pathogenic bacteria
The presumptive bacteria will be identified on the basis of morphology,
gram stain, KOH test, catalase and oxidase reaction and traditional
biochemical methods;
To identify up to species level, PCR techniques will be used;
Genomic DNA from the freshly cultured bacteria will be isolated by DNA
isolation kit; and
The identification of bacterial isolates will be confirmed by amplifying and
sequencing of the 16S ribosomal DNA and species-specific PCR followed by
analysis of nucleotide sequences.
Experiment - 1 (Contd…)
29. Quantification and comparison of bacterial contamination between
aquaponic and non-aquaponic products
Samples from the aquaponically grown strawberries and flesh of tilapia
will be tested for the quantification of pathogenic bacterial
contamination;
Similar species of soil vegetables and pond rear fish will be collected from
market places for comparative studies; and
Experiment - 1(Contd…)
30. All recorded data will compile using micrcomputer to assemble in tabular or
graphical forms;
Descriptive statistics will be done using MS-Excel and SPSS;
Analysis of Variance (ANOVA) will be used to analyze if there is any
difference in means between the treatments to determine statistical significance
(p ≤ 0.05).
Statistical analysis
Expected output
Suitability of strawberry production in media based aquaponic system will be
known;
Taste of aquaponically produced strawberry will be known; and
Pathogenic bacteria will be identified if any; and
Cost-benefit ratio will be measured.
31. Background
Aquaponics is a novel alternative method of fish and crop
production system by combining aquaculture and hydroponics;
The principle of aquaponic system is fish excrete contains
potentially toxic nitrogen compounds into nitrite and then nitrate
by nitrifying bacteria which provided in the system.
There also need to create a balance of the macro- and micro-
nutrient amount that fish can release in the water;
It is clear that the supplied feed and stocking density is directly
related to maintain the metabolites flow into the aquaponic
system; and
Thus, an experiment will be conducted to compare the effect of
stocking density on growth performance of tilapia (Oreochromis
niloticus) with bush bean in a recirculating aquaponic system.
Experiment -02: Optimizing stocking density of tilapia
in media based aquaponic technique
32. Experiment -02 (Contd…..)
Objectives
• To optimize stocking density of fish in aquaponic system;
• To assess the impact of fish biomass on vegetables growth ; and
• To identify the presence of bacterial pathogens and their
abundance in the aquaponic systems;
Tested crops
Fish : Tilapia
Vegetable : Bush bean
Treatment Total biomass of
fingerlings
Replications No. of Vegetables
saplings
T1 1.5 kg/200L
3 6
T2 2.0 kg/200L
T3 2.5 kg/200L
T4 3.0 kg/200L
Experimental
design
33. Experiment -02 (Contd…)
Methodology:
Methodology will be same as experiment -01
Expected output
Optimum stocking density of tilapia will be ensured;
Impact of total biomass of fish on vegetables growth will be
known; and
Pathogenic bacteria will be identified, if any.
34. Experiment -03: Optimizing density of tomato plant in tilapia
based aquaponic system
Objective
To find out the optimum density of tomato saplings in aquaponic system;
To assess water quality changes in various tomato density
To assess the production performance of tomato at different densities
Tested crops
Fish : Tilapia
Vegetables : Tomato
Treatment Number of
tomato
saplings/m2
Replication Fish density
T1 10
3
Best result
from
experiment
no.-2
T2 15
T3 20
T4 25
Experimental
design
35. Methodology:
Same as experiment -01
Expected output
Suitable stocking of tomato saplings in aquaponic system will be ensured;
Nutrient uptake rate by the tomato plants will be known; and
Cost-benefit ratio will be measured.
Experiment -03 (Contd…)
36. Experiment 04: Effect of different media on Production
performances of bush bean in aquaponic system
Background
A media bed in an aquaponic system that utilizes media such
as expanded clay, bricklets, gravels etc. as a foundation for root
growth. Water is pumped into a media filled grow bed and then
allowed to flow back to the fish tank.
Most grow beds are composed of heavy substrate such as clay
balls, gravels, sand, perlite, etc. These serve as support systems
for the plants and as bioremediation medias (Rakocy and
Hargreaves, 1993).
Thus it is important to find out the suitability of other media
types to support plant growth.
Therefore, an experiment will conduct to compare the
production performances of vegetables on different media based
in a recirculating aquaponic system.
37. Experiment 04 (Contd……)
Objectives:
To assess the effect of different substrates on the vegetable growth
and water filtration capacity
To measure the nutrient uptake rate of different media
To evaluate the cost-benefit ratio of different media based
aquaponic system.
Tested crops
Fish : Tilapia Vegetables : bush bean
Treatment Media Replication Fish
density
Vegetable
saplings
T1 Bricklets
3
Best
result
from
exp.-2
Best
result
from exp.-
3
T2 Gravel
T3 Bricklets and
gravel mixed
(1:1)
T4 Char coal
Experimental
design
38. Experiment 04 (Contd…)
Methodology:
Same as experiment -01
Expected output
Effects of performance of substrates on vegetable growth will be known;
and
Water filtration capability of different substrates will be identified;
Methodology may be altered based on scope of works and resources arability
during the study period
39. Sl no. Activity Duration
(month)
01 Literature review 06
02 Aquaponic unit installation 03
03
Experiments perform 18
04 Data compilation, processing and analysis 03
05 Preparation of PhD dissertation 06
Activity plan
39
