The quality of the bottom directly affects the quality of the water quality, the quality of the water quality is the manifestation of the bottom quality, usually people know the change of the bottom quality through the change of the water quality, improving the bottom quality is the basis of improving the water quality. The pathogens grow and reproduce through the organic pollution of the pond bottom, and then spread through the water body, so the pond bottom plays a key role in aquaculture.
Toxic gases such as hydrogen sulfide and ammonia produced by the deterioration of bottom material are easy to cause the deterioration of water quality. At the same time, a large amount of organic matter provided nutrients for pathogenic bacteria in the bottom mud, and the pathogenic bacteria took the opportunity to multiply and aggravate the disease of fish.
The efficacy of hypochlorous acid/slightly acidic electrolytic water/anodic solution/anolyte water in the deterioration of water quality at the bottom of the aquaculture pond is mainly reflected in its strong disinfection and purification capacity. Hypochlorous acid forms new ecological oxygen through hydrolysis, which has strong oxidation ability and can effectively kill bacteria, viruses and harmful microorganisms in water. In addition, hypochlorous acid can also decompose toxic and harmful organic substances, thereby purifying water quality.
In aquaculture, hypochlorous acid is commonly used to disinfect fish ponds, equipment, and to treat oysters and other aquatic products. For example, when fish ponds are sterilized, hypochlorous acid can be mixed with pool water to reduce the concentration of remaining chlorine in the pool water, thus ensuring the safety of fish.
However, it is important to note that hypochlorous acid/HOCL needs to be used with caution because its high concentrations may adversely affect aquatic life and may affect the growth and reproduction of aquatic animals and plants such as zooplankton, phytoplankton, shellfish and fish. Therefore, in practical applications, the dosage should be adjusted according to the specific situation, and ensure that fully mixed contact to achieve the best disinfection effect.
Hypochlorous acid has a significant effect on the deterioration of water quality at the bottom of aquaculture ponds, but the amount of hypochlorous acid should be controlled rationally to avoid negative effects on aquatic organisms.
What is the specific mechanism of hypochlorous acid disinfection in aquaculture?
Mainly through its strong oxidation to achieve. Specifically, hypochlorous acid is a strong oxidizing agent capable of hydrolysis to produce hypochlorous acid, which uses its strong oxidation properties for disinfection. Hypochlorous acid can spread to the surface of bacteria, and penetrate the cell membrane to directly oxidize the bacterial protein, thereby eliminating pathogenic microorganisms. In addition, HOCL can not only interact with the cell wall, but also because of the small molecule and no charge, it can invade the cell and oxidize the protein or destroy its phosphate dehydrogenase, so that the sugar metabolism is abnormal and lead to cell death.
In aquaculture, hypochlorous water can be used for spraying or soaking disinfection of aquaculture equipment and containers, kept completely wet for 30 seconds to a few minutes before being naturally dried or wiped dry with a sterile cleaning cloth. For the disinfection of aquatic products, the slightly acidic electrolysis water and the water body are diluted at a ratio of 1:10 to reduce the bacteria content of aquatic products and make them healthier to eat.
What is the concentration threshold for hypochlorous acid/HOCL to adversely affect aquatic organisms?
Varies by species and test conditions. For example, for algae, the lowest impact concentration is 0.005 mg/L, but its median lethal concentration (LC50) is 0.23 mg/L.
For daphnia, when the concentration is 0.11 mg/L, the IC50 of 50% is 0.008 mg/L, while at 0.11 mg/L and 0.25 mg/L, the mortality rate of daphnia reaches 40% and 50%, respectively, so the breeding NOEC is 0.03 mg/L.
For fish, when the concentration exceeds 0.79 mg/L, the hatching rate is significantly affected. The concentration of 0.36 mg/L leads to the death of fish after hatching, and the survival rate once recovered to 0.70 mg/L. The NOEC of hatching rate is 0.36 mg/L, and the NOEC of survival and survival index after hatching is 0.18 mg/L.
How to effectively control the use of hypochlorous acid to ensure water purification while protecting aquatic life?
The following measures can be taken:
Precise hypochlorous acid dosage: BLUEWAV hypochlorous acid generator is used to automatically adjust the dosage according to the flow rate of treated water, or the amount of hypochlorous acid dosage is controlled according to the feedback of the amount of chlorine remaining in the water after chlorination.
Regular testing and maintenance of appropriate chlorine surplus: For water sources such as reservoirs, regular testing and adequate chlorination are required to maintain 0.2 ppm of remaining available chlorine. For pollution caused by overflow streams, hypochlorite stations should be established upstream of the reservoir until the entire reservoir reaches a usable chlorine surplus of 0.2 ppm.
Control pH value: The proportion of hypochlorous acid and hypochlorite ions is affected by pH value, HOCL dominates at low pH value, and hypochlorite ions dominate at high pH value. Therefore, the disinfection speed and effectiveness of chlorine are affected by the pH of the treated water. Bacteria and viruses are sensitive to chlorination over a wide pH range.
How does hypochlorous acid compare with other disinfectants, such as sodium hypochlorite, in aquaculture?
Sodium hypochlorite is widely used in aquaculture, mainly for disinfection and sterilization of water bodies and aquaculture equipment, as well as prevention and control of fish, shrimp, crabs and other aquatic animals of a variety of bacterial diseases. Sodium hypochlorite is widely used in aquaculture because of its broad spectrum, stable bactericidal effect and low cost. However, the bactericidal efficacy of sodium hypochlorite is moderate and has been replaced by other quaternary ammonium disinfectants in some cases.
What are the application cases of hypochlorous acid in the deterioration of water quality at the bottom of aquaculture ponds?
Include the following aspects:
Water quality management of shrimp ponds: In shrimp ponds, calcium hypochlorite is used to thoroughly sterilize shrimp ponds with a lot of sludge. This is one of the important measures to improve water quality and prevent the spread of disease.
Disinfection in aquaculture: Hypochlorous acid is widely used to clean aquaculture ponds to address algae outbreaks and other water quality issues. For example, in sea urchin farming, hypochlorous acid and other chemicals such as chlorine dioxide are used to treat water quality problems at the bottom of the pool.
Recirculating aquaculture systems: In factory recirculating aquaculture systems (RAS), hypochlorous acid generation technology is used to improve production safety and aquatic product quality. Diseases can be effectively controlled through disinfection technology.
BLUEWAV hypochlorous acid water/anolyte generator can convert the saline electrolyte solution in water into HOCL water solution, which is used to disinfect aquaculture ponds, pipelines, equipment, etc., to prevent the occurrence and spread of aquatic diseases. Hypochlorous acid is also used to extend the freshness life of aquatic products and delay the deterioration of aquatic products by reducing microbial contamination.
Overall, the application of slightly acidic electrolytic water in aquaculture not only improves the efficiency of aquaculture, but also reduces the use of drugs, which contributes to environmental protection and sustainable development.
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