1. Apply more beneficial bacteria with nitrification-denitrification function to promote nitrification-denitrification reaction of nitrogen-containing organic matter.
2. Make the fish in different water layers have different oxygen requirements. Benthic fish adapt to low dissolved oxygen level for a long time, so when the dissolved oxygen level decreases, combined with the metabolism of nitrifying bacteria, the concentration of nitrite nitrogen in water increases, which affects the normal metabolism of fish. The upper layer fish is close to the water surface, and under the action of current and wind, it can alleviate the increase of nitrite nitrogen concentration caused by hypoxia.
3. The existence of nitrite in water indicates that the decomposition process of organic matter is still going on. If the content of nitrite is too high, it shows that the inorganic process of organic matter in water is quite strong, indicating that the harm of pollution still exists.
Units that use nitrite shall establish safety management rules and regulations for the use and storage of nitrite, formulate emergency plans for nitrite poisoning accidents, equip nitrite safety management personnel, strictly implement nitrite safety management systems and operating procedures, and carry out nitrite safety knowledge training to prevent nitrite from being mixed, misappropriated or corrupted.
Extended data
Preparation method of nitrite:
1. Nitrites of alkali metals and alkaline earth metals can be obtained by introducing equal amounts of nitric oxide and nitrogen dioxide into the hydroxide solution of metals.
2. Decomposition of nitrate can produce nitrite and oxygen.