With the rapid development of aquaculture industry, a variety of advanced water treatment technologies are widely used, such as sand filtration, microbial purification, ultraviolet sterilization and disinfection, foam separation. However, with the application of industrialized closed loop aquaculture equipment in the actual production of the promotion of high-density, small water body production conditions on the water quality requirements have become more stringent. Therefore, the application of ozone with high efficiency and rapid characteristics of water quality treatment technology also came into being.
I. Factors restricting aquaculture:
(1) The water quality is too poor, the water microbial ammonia and nitrogen exceeds the standard;
(2) aquaculture water plankton too much, the water body aerobic high oxygen content is low;
(3) Aquaculture drugs are put in large quantities, and there are residues;
(4) Feeding rotten bait;
(5) Frequent occurrence of fish disease, a large number of deaths.
II. The role of ozone in aquaculture:
1, the application of ozone can degrade organic matter, ammonia nitrogen, nitrite and other substances in the water, and kill pathogenic bacteria and plankton in the 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 production.
4、Avoid water pollution, such as red tide, industrial wastewater, domestic sewage. 5、Avoid cross-infection caused by pollution and viruses in the neighboring breeding pools.
6、Avoid water quality deterioration and pool bottom pollution.
7. Reduce consumption and production cost.
III. Factors affecting the effect of ozone
1, the concentration of ozone any permissible concentration, generally the higher the concentration of ozone, the faster the speed of killing bacteria, etc., the better the effect, but should be careful not to make it too much!
2, the water temperature of the same concentration of ozone, in different water temperatures, the amount dissolved in water is different. The lower the water temperature, the higher the solubility of water such as 30, the solubility of 22%, lO when 54%. 0cc for 69%.
3, inorganic ions in the water when the presence of more inorganic ions in the water, will accelerate the decomposition of ozone, thereby reducing the concentration of ozone, hindering the efficiency of sterilization.
4, the turbidity of the water has been reported, when the turbidity of the water in the 5mg / L or less, the effect of ozone sterilization is not significant, but when the turbidity in the 5mg / L or more, it has an impact. Because at this time a large part of the ozone for the oxidative decomposition of organic and inorganic substances
