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Published byAlyson Bates Modified over 9 years ago
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Grouper Farming in Recirculated Aquaculture Systems
By M.Sc. Tom Serholt
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Basic Principles of the Recirculated Grouper Farming System
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Project Presentation Mechanical Filtration Biological Filtration
Bacteriological Filtration
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Example of Recirculated Wastewater Treatment
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Recirculation Principles
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Excretion products and uneaten feed pellets
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Particular Waste Products
Dissolved Waste Products Ammonia/Ammonium
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Mechanical Filtration
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Mechanical Filters
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Filtration Principle
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Particular Waste Products
Dissolved Waste Products Ammonia/Ammonium (Removed by mechanical filtration) NH4+
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Project Presentation Mechanical Filtration Biological Filtration
Bacteriological Filtration
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CO2 Stripping and areation (O2)
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Particular Waste Products
Excrements Feedpellets Dissolved Waste Products Ammonia/Ammonium (Removed by mechanical filtration) (Removed by mechanical filtration) O2 NH4+
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Pump Sump
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Bio Filter Pumps
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Submerged Filter
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Submerged Filter Fixed Film Technology BIO-BLOK 150
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Convertion of Amonia to nitrite by Nitrosomonas bacteria sp.
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Particular Waste Products
Dissolved Waste Products Ammonia/Ammonium (Removed by mechanical filtration) (Convertion of ammonia to Nitrite) Nitrite O2 NH4+ NO2-
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Trickling Filter
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Trickling Filter Fixed Film Technology BIO-BLOK 200
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Convertion of Nitrite to Nitrate by Nitrobacter bacteria sp.
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Particular Waste Products
Excrements Feedpellets Dissolved Waste Products Ammonia/Ammonium (Removed by mechanical filtration) (Removed by mechanical filtration) (Convertion of ammonia to Nitrite) Nitrite (Convertion of Nitrite to Nitrate) Nitrate O2 O2 NH4+ NO2- NO3-
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Convertion of Nitrate to Nitrogen by anaerobic bacteria sp.
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Particular Waste Products
Excrements Feedpellets Dissolved Waste Products Ammonia/Ammonium (Removed by mechanical filtration) (Removed by mechanical filtration) (Convertion of ammonia to Nitrite) Nitrite (Convertion of Nitrite to Nitrate) Nitrate (Convertion of Nitrate to Nitrogen) Nitrogen O2 O2 Carbon source NH4+ NO2- NO N2
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Backwash System
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Overview Ammonia Nitrite Nitrate Nitrogen
Submerged- and trickling filter Denitrification filter Ammonia Nitrite Nitrate Nitrogen Aerobic conditions Anaerobic conditions O O Carbon source NH4+ NO2- NO N2
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Particular Waste Products
Particular Waste (Removed by mechanical filtration) Dissolved Waste Products Ammonia/Ammonium (converted in the submerged filter) Nitrite (converted in the trickling filter) Nitrate (converted in the denitrification filter) Nitrogen (emmission to the atmosphere) Furthermore BOD is converted into Water and CO2
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Project Presentation Mechanical Filtration Biological Filtration
Bacteriological Filtration
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Bacteriological Filtration
In order to reduce the bacteriological ”pressure”, the following technologies can be used: UV Filtration Ozone Membrane Filtration
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Propeller Pumps & UV-Filters
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Propeller Pumps
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UV-Treatment
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Principle of UV Filtration
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Project Presentation Mechanical Filtration Biological Filtration
Bacteriological Filtration
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Oxygenation
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Production Figures: 500 fish harvested per day with an average weight of 700g. Per fish. Size of fingerlings: 30g. Per fish. Size of fish at harvest: 700g. Per fish. Growth per day: kg. Fish per day. FCR (Feed Convertion Rate): 1,5 Fish Feed fed per day: 503kg. Per day Feeding Rate: 1,2%
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Production Figures: 500 fish harvested per day with an average weight of 700g. Per fish. Standing Stock kg. Fish (total) Temperature: Degrees Celcius Daily ”make up” water: 156m3 of water Circulating water Volume: m3 water per hour
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Thank You
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