Ce diaporama a bien été signalé.
Nous utilisons votre profil LinkedIn et vos données d’activité pour vous proposer des publicités personnalisées et pertinentes. Vous pouvez changer vos préférences de publicités à tout moment.

Double recirculation aquaponics system

586 vues

Publié le


Publié dans : Technologie
  • Soyez le premier à commenter

Double recirculation aquaponics system

  1. 1. Double Recirculation Aquaponics System Sangita Aba Khatal Roll No. 20642 Division of Agricultural Engineering, Indian Agricultural Research Institute, New Delhi.
  2. 2. Population Soil degradation Food security Water scarcity Source – (Simon et al., 2015) By 2050 global population is expected to reach 9.6 billion with more than 75% living in urban areas
  3. 3. Degraded land in lakh hectare 204.25 144.05 140.95 97.26 91.94 80.93 Total geographical area is 328.7 million hectare Degraded land area is 120.4 million hectare Source- Department of Agriculture and Cooperation, Ministry of Agriculture By 2030 almost half of the world will live under high water stress condition (FAO, 2014)
  4. 4. Protected cultivation Soilless cultivation Hydroponics Aquaponics
  5. 5. Aquaculture Hydroponics Aquaponics Source – (David et al., 2015)
  6. 6. Indian scenario in aquaculture Current fish production of India – 9.58 mtonnes Second largest in fish production Average annual growth – 5.96% (marine-3.67 and inland-7.29) Contributes 0.83% to national GDP and 4.75% to agricultural GDP Source-The handbook of fisheries statistics, 2014
  7. 7. Current status of protected cultivation Country Total Greenhouse Area (Ha) China 27,60,000 Korea 57,444 Spain 52,170 Japan 49,049 Turkey 33,515 Italy 26,500 Mexico 11,759 Netherlands 10,370 France 9,620 United States 8,425 Crop Area (mha) 1. Total Area under Horticultural Crops 19.24 2. Total area under Vegetables 7.49 3. 4. Area under Floriculture Crops Area under Fruit Crops 0.15 5.5 5. Area under Protected Cultivation <.02 India Source –Kacira, (2011) Kacira (2011)
  8. 8. Hydroponics Growing plants either on a substrate or in an aqueous medium with bare roots Source - Food and Agriculture Organization of United Nations, 2014 No soil-borne diseases and pathogens because of sterile conditions We can give optimal plant requirements leading to increased yields  Increased water- and fertilizer-use efficiency  Area efficient technology Why hydroponics ?
  9. 9. Captive rearing and production of fish and other aquatic animal and plant species under controlled conditions Methods: open water systems pond culture flow-through raceways  Recirculation Aquaculture System (RAS) Aquaculture Source – FAO,2014
  10. 10. Recirculating Aquaculture System (RAS) The most efficient and water-saving technology in fish farming Source – FAO,2014
  11. 11. Expensive waste -water treatment It can lead to eutrophication and hypoxia in the watershed and localized coastal areas Overgrowth of coral reefs and other ecological and economical disturbances Problems of RAS Source – FAO,2014
  12. 12. An effluent from aquaculture system is a sustainable, cost-effective and non-chemical source of fertilizer for plants  Organic food production Sustainable agricultural practice Why hydroponics should integrate with aquaculture ?
  13. 13. Aquaponics (Single Recirculation) Source – FAO,2014
  14. 14. Source – FAO,2014
  15. 15. Current Status and Challenges Lower productivity Fish and plant requirements do not always match perfectly Restricted to grow plants with less nutrient requirement Source– (Werner et al., 2015)
  16. 16. Double Recirculation Aquaponic System (DRAS) Source – (Werner et al., 2015)
  17. 17. Material and methods They selected combination of Nile tilapia fish and Tomato plant Used 1280 tilapia with total weight of 202kg Stocking density ranging from 32.5-65.1 kg/cu.m 116 tomato plants were introduced after 3 days latter Used nutrient film technology of hydroponics Whole testing duration lasted from 6 march to 26 november
  18. 18. Fish production 243.3 kg 234.1 kg
  19. 19. Tomato production Average tomato yield =8.89 kg/plant 1005.62 kg
  20. 20. Water use 220.6 l of water is used for 1 kg of Tilapia and 1.67 kg of tomatoes Total fresh water added = 132400 l (tap water = 94000 l and condensate gained water=38400 l) Daily water used = 3.83 % of the total volume Thus the net introduction of tap water = 2.72 % Cumulative water use is 34059 l Daily water use is more in the month of june
  21. 21. Total nutrient load from RAS to hydroponic system = 25.66 kg To optimize growth conditions some mineral fertilizers were introduced to hydroponic unit Fertilizer Quantity (kg) Kristalon Spezial 0.80 CalciNit 0.75 KHCO3 0.08 K2HPO4 2.80
  22. 22. Optimum standardized fertilizer
  23. 23. All the CO2 released by the metabolism of fish is fixed by the tomato plants Overall CO2 released = 778.4 kg  Tomato plant can fix 1339 Kg CO2  Net sink of 560.6 Kg CO2 Hence fostering sustainability CO2 Balance
  24. 24. Findings Total weight gain=600.1kg using 736.2 kg feed
  25. 25. Benefits Fish feed provides most of the nutrients for plant grow Two agricultural products (fish and vegetables) are produced from one nitrogen source (fish food) Optimum use of fertilizers or chemical pesticides Labour-saving Area efficient technology Sustainable and intensive food production system
  26. 26. Limitations Expensive initial start-up.  Knowledge of fish, bacteria and plant production is needed. Mistakes or accidents can cause collapse of system.  Daily management is mandatory. Requires reliable access to electricity, fish seed and plant seeds.
  27. 27. Conclusion Aquaponics is a new , rapidly emerging, ecofriendly agricultura technology that can integrate RAS with hydroponics This technology is efficient because it uses fish waste to feed the plants providing symbiotic environment for producing fish and plants The DRAS allows integration of value added chains for water, nutrients, and carbon dioxide in a sustainable way DRAS might provide the potential to increase not only sustainability but also the productivities of fish and plants