With the rapid development of my country's aquaculture industry, various advanced water treatment technologies have been widely used, such as sand filtration, microbial purification, ultraviolet sterilization, and foam separation. However, with the popularization and application of industrialized closed recirculating aquaculture equipment in actual production, the production conditions of high density and small water bodies have stricter requirements on water quality. Therefore, the application of high-efficiency and fast ozone technology for water quality treatment has emerged as the times require.
1. Factors restricting aquaculture:
(1) The water quality is too poor, and the microbial ammonia nitrogen in the water exceeds the standard;
(2) There are too many floats in the aquaculture water, and the water body has high aerobic and low oxygen content;
(3) A large number of aquatic medicines are added and there are residues;
(4) Feeding corrupt bait;
(5) Frequent fish diseases and a large number of deaths.
2. Aquaculture water treatment :
Using the principle of ozone oxidation, it can purify thoroughly, sterilize quickly, inhibit algae, and finally divide it into oxygen. There is no residue in the water, and it can also supplement oxygen in the water.
(1) The ozone concentration in freshwater aquaculture is (amount of ozone added: 1 gram per cubic meter of water)
(2) Treatment of ozone sterilization feeding water in mariculture: (Ozone dosage: 2 grams per cubic meter of water)
3. Description of aquaculture water treatment process:
The closed-circulating water treatment aquaculture system process is to process the sea water in stages to improve the sea water quality and provide an excellent growth environment for fish. The process includes:
(1) Seawater filtration
Mainly by microfiltration, activated carbon filtration, sand filtration, to update the water quality.
(2) Seawater disinfection
Ozone technology is used to kill bacteria and algae in seawater, degrade viruses in water, and prevent diseases.
(3) Seawater oxygenation
Use pure oxygen to form fine air bubbles through high-efficiency ejectors to increase the dissolved oxygen in seawater.
(4) Sea water is warming
The heat exchanger is used to adjust the temperature of circulating water to provide suitable temperature for fish growth.
4. Ozone function in aquaculture:
(1) The application of ozone can degrade organic matter, ammonia nitrogen, nitrite and other substances in water, and kill pathogenic bacteria and plankton in water.
(2) Greatly improve the survival rate of fish, shrimp, shellfish nursery and breeding.
(3) Significantly improve the conversion rate of feed, promote growth and increase yield.
(4)Avoid water pollution, such as red tide, industrial wastewater, domestic sewage, etc.
(5) Avoid cross-infection caused by pollution and viruses in the surrounding breeding ponds.
(6) Avoid water quality deterioration and bottom pollution.
(7) Reduce consumption and production cost.
5. Factors affecting the effect of ozone
(1) The concentration of ozone is within the allowable concentration. Generally, the higher the concentration of ozone, the faster the speed of killing bacteria, the better the effect, but care should be taken not to make it excessive.
(2) For the same ozone concentration at the same water temperature, the amount of ozone dissolved in water is different at different water temperatures. The lower the water temperature, the higher the solubility in water. For example, when it is 30, the solubility is 22%, and when it is 10, it is 54%. 0cc is 69%
(3) Inorganic ions in water When there are many inorganic ions in the water, it will accelerate the decomposition of ozone, thereby reducing the concentration of ozone and hindering the efficiency of sterilization.
(4) Turbidity in water It is reported that when the turbidity of water is below 5mg/L, it has little effect on the sterilization effect of ozone, but when the turbidity is above 5mg/L, it has an impact. Because a large part of ozone is used for the oxidative decomposition of organic and inorganic substances at this time
6. Customer case
