Ozone Impact on Trout Fish

Posted by Brialle Veldman on July 17, 2017 under Aquaculture & Zoos | Be the First to Comment

Fish in general is a popular meat to the human species. Fish is extremely perishable, which often leads to spoilage. Therefore, the shelf-life of a product is a very important factor to most businesses. When looking at trout, there are many positive impacts that ozone will bring to the food processing plants that house these fish. Bacteria collect on the fish, particularly non-protein nitrogenous compounds, which are typically associated with fish decomposition. It was demonstrated that the use of slurry ice extends the shelf life of sardine and non-fat fish species, such as Farmed Sea Bream, European Hake, and shrimp. Hence, along with gaseous and dissolved ozone, ozonated ice has become a popular method because it holds the same powerful properties. Since the early 1920s, many scientists have embarked on the theory of applying the powerful properties of ozone to improve shelf-life and safety of fishery products. Not until 1997, when the US Department of Agriculture approved ozone for reconditioning the recycled poultry chilling water, did many reports expand the possibility of using ozone to disinfect food surfaces. Ozone has become an alternative method that works because it kills microorganisms by destroying the cell wall and leaves no harmful byproducts. In a specific research experiment, freshly caught trout were obtained from a local fish farm. The trout were about 25cm in size and weighed around 300 grams. Gaseous ozone was injected into the bottom of a water container by an ozone generator with an internal pump. During oxidation, the concentration that was reached in the water was .1 PPM in 20 minutes and was kept constant during this experiment. Once the .1 PPM was achieved, the fish were immersed in the treated water. After 2 hours exposure, they were put in an isolated container stored at 5 degrees C. Once the experiment was over, microbial tests were taken immediately after. For this test method, the microbial tests were performed at different dilutions. Brine 5% was used as the diluting agent. The samples were taken from the ozone treated fish specimens for biochemical tests.  Additional research has shown that ozone treatment can give fish a slightly higher weight count for profitability.

Ozone results:

  • Ozone treatment increased the shelf life of trout from 4 days to 6 days, which helps in longer preservation time.
  • Ozone treatment significantly slowed the microbial growth, resulting in lower counts of bacteria.
  • Ozone treatment had no destroying defect on the fish biochemical properties.
  • Ozone treatment removes the contaminants from the fish skin which causes higher protein number.
  • Sensory analysis displayed no change in color or taste of ozone treated trout.

Dehkordi, Behrouz M., and Neda Zokaie. “Extension of Fish Shelf Life by Ozone Treatment.” International Journal of Environmental, Chemical, Ecological, Geological and Geophysical Engineering 4.No:2 (2010): n. pag. Web. 17 July 2017.


Improving Aquaculture with Ozone

Posted by Brialle Veldman on November 16, 2016 under Aquaculture & Zoos | Read the First Comment

In aquaculture applications, ozone has the ability to increase efficiency, lower pathogen amounts, and optimize water quality of the water treatment system. In particular, fish farms can benefit by allowing higher feed rates, which allows for higher growth rates. From an investment stand-point, adding ozone has shown an impressive return. The key to utilizing ozone in a specific process is how much ozone is needed to effectively treat a system. The best way to find out is gaining information from the potential customer on how their system is currently being treated to find an accurate solution. Provided the right concentration, any water treatment for RAS will be successful. Listed below are the reasons to incorporate ozone to aquaculture:

  1. The removal of fine and colloidal solids
  2. The removal of dissolved organic compounds
  3. The removal of nitrites

               Generally, the required dosage of ozone for treatment in a RAS is formulated according to the daily feed rate. Rates of 10 to 15 grams of ozone per kilogram of feed are usually recommended to bring down the collected organics. If disinfection is the primary intention or purpose, the quantum of ozone is largely influenced by the organic contaminants in the water. In pure water, residual concentrations of 0.01-.1 PPM for periods of 15 seconds can be practical to reducing bacterial amounts. Thus, the more contaminants of bacteria, the more residual ozone is needed to provide enough disinfection. Natural waters, generally require residual concentrations between 0.1-0.2 ppm of ozone for 1-5 minutes for disinfection. Aquaculture effluent usually requires between 0.2-0.4 ppm residual ozone for 1-5 minutes for significant disinfection to take place after oxidation of organics. For most favorable outcomes, the rate of ozone for disinfection is heavily dependent on factors listed above. It also represents the total amount of ozone demand. Give us a call to improve your aquaculture today!

NSW Government. “Ozone in Recirculating Aquaculture Systems.” Ozone in Recirculating Aquaculture Systems. Department of Primary Industries, n.d. Web. 15 Nov. 2016.

fish farming picture


Ozone for Ballast Water

Posted by Kaleb Jensen on December 9, 2014 under Aquaculture & Zoos | Read the First Comment

Non-indigenous aquatic species are a threat to marine resources around the world, with new introductions occurring on every coast. The introduction of NIS into coastal marine and estuarine waters comes from a variety of sources. Due to the large volumes and frequency of possible inoculations, ballast water is currently the most frequently cited method for the worldwide transfer of NIS. Annually, 21 billion gallons of ballast water are discharged into the U.S. [1].

The Bow Of A Big Tanker ShipBallast water has been shown to contain a number of bacterial pathogens that can impact human health. Ballast water treatment by ozonation is one of the many treatment technologies being studied for implementation on board commercial vessels. Ozone will remove algae also and will eliminate deposit corrosion caused by biofilms. Please contact Ozone Solution for using ozone to disinfect ballast water.



[1]. www.nbep.org/publications/other/ballast/BallWaterIntroSpeciesRpt.pdf

Ozone for Fish Farms

Posted by Kaleb Jensen on November 17, 2014 under Aquaculture & Zoos | Read the First Comment

Fresh water fisheryIn a fish farm and aquarium, conventional solids removal, such as sponge floss filters and sand filters, are removing coarse and filterable solids, but they are not capable of removing fine colloidal solids.  In another point of view, nitrifying bacteria in bio-filters remove dissolved ammonia and nitrite, but not all dissolved organic wastes. As an aquarium matures, the accumulation of dissolved organic colloidal solids increases. This organic buildup decreases the performance of the nitrifying bacteria which causes harmful nitrite buildup. The biochemical oxygen demand also rises, so the oxygen levels decrease over time. These shifts in water parameters stress the aquarium inhabitants and may cause fish mortality. To reduce the necessity of large water changes, there is a very efficient alternative method of breaking down these organic wastes using a strong oxidizing agent. This method is “Ozonation.” Ozonation has several benefits in fish tanks including:

  • Removal of dissolved solids (TDS and TSS) by clumping them together to bigger dimension particles that can be removed by the protein skimmer or activated carbon.
  • Ozone oxidizes Organic compounds in water (TOC) and breaks them to simple organics that are now available for degradation by heterotrophic bacteria.
  • Reduction of harmful ammonia (NH3-) and nitrite (NO2-) levels by oxidizing them to nitrate (NO3-).
  • Precipitation of metals, such as Iron and Manganese.
  • Algae and biofilm removal
  • Removing smell by destroying sulfides.
  • Degradation of pesticides, detergents, and possible trace of acetone, MTBE which will keep water healthy for inhabitants.
  • Ozone kills 99% of bacteria and viruses and dramatically reduces BOD and COD levels.
  • Increased water clarity (even if it had been very clear before ozone)

Ozone, at the end, reverts back to oxygen and increase dissolve oxygen level in water. The right ozone level is very important to keep fish healthy and the overdosing of ozone will be harmful for inhabitants.

Nano Bubble Ozone Technology

Posted by Kaleb Jensen on July 25, 2014 under Aquaculture & Zoos | 5 Comments to Read

Ozone bubbles are used these days in several applications, but Ozone nano-bubbles can be used to purify water, improve the vitality of fish, animals, and plants.  It could also contribute to solving problems associated with biology, medicine, and food in the future. The secret is behind the high surface area of the nano-bubbles, which provides high mass transfer rates compared to traditional bubbles.

For example:Oyster

Ozone nano-bubble technology can purify waste water from the polymerized toner production process by using energy derived from the bursting of fine ozone bubbles (below 300 nano-meters in diameter). Water treated through this technology can be reused in the production process, thus providing a closed water recycling system. In this case, the process will save noticeable amount of money and energy in waste water treatment of polymerized toner production.

Nano-bubble ozonation of oyster will eliminate 99 percent of the calicivirus in oyster. Ozone nano-bubbles are very effective and are a new horizon in ozone technology.  Contact us today if you think this could be a very promising solution for your operation.

Aquaculture and Ozone

Posted by Joel Leusink on July 19, 2011 under Aquaculture & Zoos | Be the First to Comment

Ozone use in Aquaculture

Ozone is increasingly used in aquaculture due to its numerous advantages over traditional water treatment methods. Supplementing or replacing an existing system, ozone implementation has the potential to boost the competitive advantage of your aquaculture application.

Aquaculture and Ozone

Ozone Advantages

  • Reduced Water Usage
  • Faster Growth Rates
  • Reduction of Waterborne Diseases
  • Higher Standard of Environmental Control
  • Supplements other Treatment Processes

To take full advantage of ozone, you have to understand the basics. Click here to learn more.

Why Ozone Use is Growing in Aquaculture

  • It effectively removes organics, pesticides, discoloration, and nitrates.
  • Typically unconsumed ozone reverts back to oxygen, leaving no harmful residuals behind.
  • Ozone oxidizes long chain molecules, which are unaffected by biofiltration.
  • Ozone involves far lower risk of accidental pollution in comparison to other water treatment methods.
  • O3 improves the effectiveness of biological and particulate filtration.