After adding surfactants to the culture water

2019-11-29 21:47:11

Oxygenation principle of surfactant: the saturated solubility of oxygen in aquaculture water can be increased by adding surfactant. According to hydrate formation theory and bimembrane theory, due to the low solubility of oxygen in water, water oxygenates in water generally form at the gas-liquid interface first, and then slowly diffuse from the gas phase to the liquid phase. Due to the solubilization of surfactants, a large amount of oxygen is dissolved in the surfactant micelles formed in the aqueous solution, so that the formation of water oxygenate in the surfactant aqueous solution can not only occur at the gas-liquid interface, but also in the water body, reducing the formation time of water oxygenate, and improving the oxygen in the water body Solubility in.

In the process of modern culture, it is necessary to detoxify the water regularly, that is to say, to eliminate the toxic components in the water and the bottom, such as heavy metal ions, the residual toxin of disinfection, insecticidal and algaecide drugs, and the toxin of biological metabolites. Choosing proper surfactant can solve this problem well. For example, the use of antidote alkyl amino acids (3-4 mu / kg, diluted with water for 100 times) has a good degradation effect on residual drugs or other harmful substances. Chinese style

In the process of water quality test, there are often problems such as low dissolved oxygen, excessive ammonia nitrogen and nitrite, and abnormal pH value. When the dissolved oxygen is low, sugar ester surfactant can be added; when the pH is lower than 7, palm quaternary ammonium salt can be used to stimulate the rapid fission growth of spores or use algal auxin magnesium laurate to benefit algae to improve the pH of pool water; when the hydrogen sulfide or nitrite is over standard, Gemini coconut oil betaine type oxygen enhancer can be used to increase the dissolved oxygen in water, especially at the bottom Dissolved oxygen to facilitate the oxidation and decomposition of organic matter.

In the conventional water quality improver, we often use a large number of flocculants, such as aluminum potassium sulfate, aluminum sulfate, polyaluminium chloride (PAC) and polyferric sulfate (PFS), which have the disadvantages of large amount, unstable effect and secondary pollution. At present, polyethylenedimethylammonium chloride, polyammonium, sodium polyacrylate and acrylamide are gradually replacing the traditional water purification agent.

The polymer flocculant widely used in China is mainly the product of polyacrylamide series. Polyacrylamide is a kind of linear water-soluble copolymer. The modified cationic polyacrylamide is a solid powder, easy to dissolve in water, with strong moisture absorption and flocculation. It is a linear polymer surfactant with positive charge, which can make the suspended organic colloids and organic compounds Effective flocculation.