Can Nanofiltration Membrane Technology Enable Acid-Base Recovery?

Acid and alkali wastewater mainly comes from industries such as metallurgy, petrochemicals, and chemical fibers. If these acid and alkali wastewater are not treated and discharged, it will not only cause waste of resources but also lead to serious environmental pollution problems. Therefore, in response to this pollution problem, we begin to use membrane technology for deep treatment.

Understanding nanofiltration membrane technology

When dealing with acid and alkali wastewater, we usually use nanofiltration membrane technology, which can effectively provide deep treatment and resource recycling compared with traditional treatment methods in the past. Nanofiltration membrane is a new type of separation membrane that appeared in the late 1980s. Its molecular weight cut-off is between reverse osmosis membrane and ultrafiltration membrane, about 100-2000Da. It is speculated that the nanofiltration membrane may have a pore structure of about 1 nm, hence the name "nanofiltration". Most nanofiltration membranes are composite membranes, and their surface separation layers are composed of polyelectrolytes, thus having a certain retention rate for inorganic salts. So, what are the advantages of using nanofiltration membrane technology for acid and alkali wastewater recycling?

Advantages of using nanofiltration membrane technology for acid and alkali wastewater recycling

Nanofiltration membranes can reduce the total amount of sewage discharged and reduce the degree of environmental pollution when conducting deep treatment and recycling of acid and alkali wastewater.

Useful acids and alkalis can be effectively recovered, reducing resource waste and production costs.

When purifying waste acid and alkali solutions, it effectively improves the quality of acids and alkalis, thereby achieving resource optimization.

All of the three points above indicate that nanofiltration membrane technology can effectively recover the acid and alkali components in acid and alkali wastewater. The transmittance of the mixed solution of alkali liquid after treatment using nanofiltration membrane technology is about 90%, and the alkali concentration is between 3% and 4%. After being adjusted, it can be effectively reused in production. Moreover, using nanofiltration membrane technology for direct treatment does not require pretreatment settings, and the produced water also meets the national standard.

In conclusion, the application of nanofiltration membrane technology in the treatment of acid and alkali wastewater can not only achieve pollution-free discharge but also achieve acid and alkali recycling and reuse. Overall, the development of nanofiltration membrane technology can be described as bright.

Jiangsu Jiuwu Hi-tech Co., LTD was established in 1997 and is one of the most professional and trustworthy ceramic membrane manufacturers in China. Jiuwu Hi-Tech has more than 50 ceramic membrane patents and provides a range of high-quality microfiltration, ultrafiltration, nanofiltration ceramic membranes, ceramic membrane components, membrane testing machines, and industrial professional ceramic membrane filtration systems. These are used for liquid separation in the fields of solid-food and beverage, biotechnology, water treatment, chemical industry, and more. Jiuwu Hi-Tech is committed to providing customers with the best quality ceramic membrane products and services.