Nanofiltration membrane separation technology is a physical method of separating and removing pollutants and harmful substances from wastewater through the excellent filtration ability of nanofiltration membranes. Traditional wastewater treatment technology requires high equipment requirements, occupies a large area, has long process flows and complex operations, and incurs high investment costs. The use of nanofiltration membrane separation technology can not only reduce the energy consumption of wastewater treatment, but also significantly improve the quality of wastewater treatment.

Nanofiltration membranes have advantages such as high pressure resistance, high temperature resistance, acid and alkali resistance, and stable chemical properties, making them suitable for various types of wastewater treatment. It has a small pore size, dense distribution, high filtration accuracy, and strong ion selectivity. It can effectively intercept divalent and high valent ions by passing through monovalent ions. At the same time, it can also fully separate soluble organic compounds, non-metallic compounds, metal compounds, salts, bacteria, and microorganisms, with stable performance.

The nanofiltration membrane achieves filtration without the need for cumbersome operating procedures. It can start filtration with pressure as the driving force and does not require chemical reactions. There is no phase change during the treatment process and no new pollutants are generated, making it highly safe. It also has strong anti pollution ability, is not easily blocked by pollutants, is easy to clean and regenerate, has strong automation operation ability, and a long service life.

List the following industrial wastewater that can be treated using nanofiltration membrane separation technology:

1. Pesticide production wastewater: Pesticide production wastewater usually contains high concentrations of organic matter, ammonia nitrogen, phosphorus, heavy metals, as well as unreacted pesticide raw materials and other by-products. It has the characteristics of complex composition, high toxicity, and difficult degradation. Nanofiltration membrane separation technology can be used for harmless treatment;

2. Dairy production wastewater: sourced from the cleaning, disinfection, and cooling processes of dairy processing, it contains components such as milk protein, lactose, fat, detergents, acid-base substances, microorganisms, and some nutrients. It has the characteristics of high organic matter concentration and good biodegradability. Nanofiltration membrane separation technology can fully filter these substances, resulting in good effluent quality;

3. Pharmaceutical wastewater: This type of wastewater has the characteristics of complex composition, high concentration of organic matter and ammonia nitrogen, and high biological toxicity. Nanofiltration membrane separation technology can separate and filter intermediates, by-products, solvents, acid-base, etc. contained in the wastewater, reducing the biological toxicity of the wastewater.