July 16, 2017

Download Aquaculture Engineering by Odd-Ivar Lekang PDF

By Odd-Ivar Lekang

World wide, aquaculture has elevated at a typical of 9.2% for the previous 30 years, in comparison with in basic terms 2.8% annual raise for terrestrial farming. construction from fish (and shellfish and algae) farms now contains 30% of the complete of the World's foodstuff from our waters and this development is anticipated to proceed till a minimum of 2025.Aquaculture engineering is a key quarter for all aquatic construction amenities and this complete e-book covers all elements of aquaculture engineering with chapters protecting water delivery and teatment, construction devices (e.g. tanks and cages), feeding platforms, fish delivery and grading, egg dealing with, instrumentation and tracking, slaughtering, cleansing and waste dealing with, development and layout, making plans and qc.

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Extra info for Aquaculture Engineering

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To fully understand water treatments effects, a good knowledge of basic water chemistry is an advantage; this topic is not covered in this book but extensive literature is available, for example refs 11-13. 3 Outlet water All outlet water discharged from aquaculture facilities can present environmental problems which create an imbalance in the ecosystem in the recipient water body. This is especially important when the outlet water is discharged into freshwater. Freshwater recipient water bodies are of limited volume, whereas the sea represents an infinitely large water body; therefore the consequences of a discharge into a freshwater recipient, such as a small lake, will be much greater for both open and closed production units.

Even if the quality requirements vary, it is better to have good quality water than bad, if this is possible. Optimal water temperature is species specific and so general advice is impossible. Species can be defined generally as warm water species (>20°C) and cold water species (<20°C). Some species temperatures prefer below 10°C. If the water temperature falls below 0°C freezing will be a problem. The oxygen content of the water enclosure (see full saturation, p. 119) is reduced with increasing temperature.

Problems are more likely to occur when there is static suction lift into the pump. Pipeline characteristics When delivering water through a pipeline, the pressure and/or head that the pump has to deliver depends on the flow rate to be pumped through the pipe. If the pump is not running, the only resistance is the fixed static head; however, when the pump starts to work there is in addition a resistance head (manometric head) caused by friction losses in the pipe. The manometric head increases with the flow rate through the pipe.

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