In the pursuit of efficiency and environmental protection, recirculating aquaculture system (RAS) has become a hot topic in the field of aquaculture.
However, the odor problem is a troublesome problem in this system.
Why does the smell exist?
Odors are usually caused by chemicals metabolized by microorganisms such as bacteria and algae in the water, such as geosmin and 2-methylisobornyl. Once the system equipment does not keep up, it is easy to produce odor.
Does the smell matter? Yes, I have!
Although these odorous substances are harmless to fish and humans, they will be absorbed by fish through the gills and skin, which will make the fish taste earthy and affect the quality of the fish.
Normally, an ozone generator is used to solve this problem
The ozone produced by the ozone generator can chemically react with substances that produce odor such as ammonia and hydrogen sulfide in the water body to decompose it into harmless substances, so as to effectively remove odor.
But recently, Finland's Natural Resources Institute (Luke) and the VTT Technical Research Center have jointly launched an innovative technology to provide a new solution to this problem.
-- Using chemically treated fiber materials to capture odorous substances in water.
Luke and VTT researchers have worked tirelessly to develop a new type of fiber technology. This technique uses chemically treated fibrous materials to capture odorous substances in water.
In the experiment, the researchers tested 14 common odor substances, and the results showed that this fiber material has a strong adsorption capacity, can effectively capture and concentrate these odor substances, and the concentration of odor compounds accumulated in the treated fiber material is 1000 times higher than that of untreated water!
In addition to solving the odor problem, the fiber material has a bright spot
-- Solve the water mold problem!
Speaking of water mold, aquatic people are deeply disgusted. Especially in the farming of fish such as salmon, water mold can cause production losses of up to 10%.
The new fiber technology effectively traps water mold spores. This means that the technology can not only solve the odor problem, but also effectively reduce the impact of water mold on farmed fish, bringing double protection to the aquaculture industry.
In addition, it is worth reassuring that the fiber material is non-toxic and harmless, and will not cause any negative impact on the quality of aquaculture water and fish.
Luke and VTT have filed a patent for the technology and plan to test it on a commercial scale through further experiments.
We believe that in the near future, this technology will be widely used in aquaculture and inject new vitality into the sustainable development of the aquaculture industry.