Testing micro-nanobubble generating device at different salinities
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Testing micro-nanobubble generating device at different salinities
Feb 7, 2016 - The micro-nanobubble generating device that was used in the experiment. ... There is increasing interest in fine-bubble diffusers as a means.
Testing micro-nanobubble generating device at different salinities February 7, 2016 | by Hisham A. Abdelrahman
Efficient oxygenation of saline water at up to 30 PPT Bubble size is a critical parameter in diffused bubble, aquaculture aeration systems. A study conducted to determine the influence of water with different salinities on performance of nanobubble generating technology (NBT) showed that by using the same amount of power and air flow, the amount of oxygen transferred by NBT into water at a salinity of 30 ppt is 8.5 times that transferred into city (fresh) water.
Aeration in aquaculture Natural oxygenation by diffusion from the air and photosynthesis by aquatic plants will not meet the combined oxygen demand of the cultured species and the other biota in intensive aquaculture. The The micro-nanobubble generating device that was used in the experiment. efforts to increase dissolved oxygen (DO) concentrations in ponds include partial water exchange to replace the oxygen-deficient water with oxygenated water from the source, addition of fertilizer to stimulate photosynthesis by aquatic plants, applications of compounds such as hydrogen peroxide that release oxygen through chemical reactions, adding pure oxygen gas into pond waters, and use of mechanical aerators. Water exchange and aeration are the most widely used and effective techniques. In semi-intensive and intensive aquaculture, aerators are necessary to satisfy the oxygen requirements for respiration of the cultured organisms. Sufficient aeration also is essential for ammonia management by promoting nitrification. Different types of aeration are used in aquaculture. Aeration is performed through two methods: splashing water into air with devices such as vertical pumps, pump sprayers and paddle wheels; or releasing bubbles of air into water with propeller-aspirator-pumps and diffused-air systems. There is increasing interest in fine-bubble diffusers as a means of aerating aquaculture system─ particularly in highly-intensive grow-out or holding units.
Micro-nanobubbles Microbubbles (MBs) and nanobubbles (NBs) are tiny bubbles with a respective diameter of 10–50 µm and
