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Learn About Aquafeed

Learn About Aquafeed
The aquaculture industry is the fastest growing food production industry in the world and approximately 50% of all fish consumed by humans is from aquaculture. According to different fish species and feeding method, aquafeed is classified into Floating feeds and Sinking feeds.Floating feeds are more digestible as a result of cooking process and the heat and pressure deactivate destructive enzymes as well. Raw materials are propelled by screws along the barrel of the extruder machine to cook the materials at 120-175ºC for about 30 seconds. The homogenous cooked mixture is forced through a die at high pressure. The material expands because of the pressure difference. Floating feed are produced when manufacturing conditions are not optimal and can occur when feed is produced by extrusion. Sinking feeds are solid feed pellets that submerged during application. Bottom feeder shrimp, for example, prefer sinking pellets (density greater than that of water, 1 g/cm3) and will not accept a floating feed . The farmer cannot always estimate feeding rates properly in relation to the biomass present in his pond and feeding whether too low or too high than the actual requirement. aquafeed formation process.

fish feed

In the production of fish feed, it can be produced by two major methods, pelleting or extrusion. For majority of the markets, pelleting solutions are still highly recommended. Below a pelleting process description will be proposed.Pulverizer grinding:is a size reduction process for raw materials by hammer mills.
mixing system: followed for even material blend for balance forward process. Other sources like pre-mix, liquid, oil and fat are now added and mixed with raw material by batches
Pelleting: the mixer feeds down through a feed hopper into the feed screws which meter the ingredients into differential diameter conditioner and a double single-shaft conditioner are followed. Direct and indirect steam are added in this step. Retention time can be controlled by frequency controller. Sizes of feeds are controlled by hole diameters of pellet dies.
Drying: a dryer is followed to evaporate the additional water added earlier.
Cooling:cooler lowers the hot pellets temperature to + 2 °C of room temperature with ambient air.
Bagging and sealing system: weighing cell and bagging machines put pellets into bags and seal the bags for storage.