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Dr. Elsayed Gomaa Elsayed Khater :: Theses :

Title AQUAPONICS: THE INTEGRATION OF FISH AND VEGETABLES CULTURE IN RECIRCULTING SYSTEMS
Type MSc
Supervisors Z A Elhaddad; S A Ali
Year 2006
Abstract The main objective of this research is to study the effect of source of nutrients, water flow rate and length of gully to know the possibility of producing lettuce plants depending on the nutrients existing in effluent fish farm as compared with the lettuce production using standard nutrient solutions. To achieve that was studied the effect of source of nutrients (effluent fish water and nutrient solution), flow rate (1.0, 1.5 and 2.0 L min-1) and length of gully (2, 3 and 4 m) on the following parameters: nutrient uptake, dry weight and NO3-N content in plant. The obtained results indicated that the fresh and dry weight of shoots increased in nutrient solution over those of effluent fish farm. The fresh and dry weight of shoots decreased with increasing the flow rate and the length of gully. The dry weight of roots increased in nutrient solution over those of effluent fish farm. The dry weight of roots decreased with increasing the flow rate and the length of gully. The NO3-N content significantly increased in nutrient solution over those of effluent fish farm. The NO3-N content decreased with increasing the flow rate and length of gully. The NO3/protein ratio increased in nutrient solution over those of effluent fish farm.
Keywords Aquaponics; Hydroponics; Aquaculture; Fish farm
University Benha
Country Egypt
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Title SIMULATION MODEL FOR DESIGN AND MANAGEMENT OF WATER RECIRCULATING SYSTEMS IN AQUACULTURE
Type PhD
Supervisors A H Bahnasawr; S A Ali; M A Awaad
Year 2012
Abstract A simulation model for design and management of water recirculating aquaculture systems was developed. The model was able to predict the water temperature and energy consumption at different air ambient temperature (23, 25, 27, 29 and 31 ºC) and to predict the oxygen consumption, ammonia production and nitrate production at different water temperatures (24, 26, 28, 30 and 32 ºC). Also, the model was able to predict the solids generation at different water depths (0.8, 1.0, 1.2, 1.4 and 1.6m) and different settling velocities (1.25, 1.67, 2.08, 2.5 and 2.9 m/hour). Experiment was conducted to validate the simulation model results. The results indicated that the average hourly temperature predicted by the model was in a good agreement with those measured by the system, where, it ranged 25.00 to30.90˚C experimentally, while it was from 24.20 to29.86˚C theoretically. The predicted oxygen consumption values were between 189.13 to 457.56 mg O2/kg fish per hour and the measured oxygen consumption values were from 197.42 to 467.61 mg O2/kg fish per hour. The ammonia production from the system ranged from 10.56 to 52.96 mg NH3/kg fish.hour experimentally while it was from 10.45 to 48.61 mg NH3/kg fish.hour theoretically. The nitrate production from the system ranged from 41.61 to 222.31 mg NO3/kg fish.hour experimentally while it was from 45.34 to 210.97 mg NO3/kg fish.hour theoretically. The settleabe solids removal was determined and was found to be between 0.0304 to 0.0556 kg m-3 (30.40 to 55.60 mg l-1) while it was 0.039 kg m-3 (39 mg l-1) theoretically. The suspended solids removal was determined and was found to be between 0.0123 to 0.0806 kg m-3 (12.30 to 80.60 mg l-1) while it was from 0.0124 to 0.1425 kg m-3 theoretically. The weight of individual fish from the system ranged from 4.00 to 115.79 g experimentally, while it was from 4.00 to 130.80 g theoretically. The model results were in a reasonable agreement with the experimental ones.
Keywords Aquaculture, Fish, recirculating systems
University Benha
Country Egypt
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