What Aspects Should Be Considered to Prolong the Service Life of Ultrafiltration Membranes?

Ultrafiltration membrane is the core component of the ultrafiltration system, bearing the important responsibilities of separation and concentration. However, no matter how high the quality of the ultrafiltration membrane is, it has a lifecycle. Extending the service life of the ultrafiltration membrane is an important measure to save operating costs. How to operate specifically?

Understand the ultrafiltration membrane

The ultrafiltration membrane is a high-molecular-weight semi-permeable membrane that can separate colloids or suspended particles of a certain size from a solution in the ultrafiltration process. It is a non-symmetrical membrane type with a pore size of 1 to 100 nm and a pore density of about 10/cm. The operating pressure differential is 100 to 1000 kPa. It is suitable for removing colloidal grade particles and large molecules and can separate solutions with a concentration of less than 10%. The ultrafiltration membrane has been widely used in the deep treatment of industrial wastewater and process water, such as the concentration, purification, and separation of macromolecular substances in the chemical, food, and pharmaceutical industries, sterilization of biological solutions, separation of dyes in dyeing and printing wastewater, recovery of glycerol in petrochemical wastewater, recovery of silver in photographic chemical wastewater, and preparation of ultra-pure water, etc. It can also be used for sludge concentration and dehydration.

Extend the service life of the ultrafiltration membrane

When the service life of the ultrafiltration membrane ends and the adsorption capacity reaches saturation, the ultrafiltration membrane will become blocked. If the ultrafiltration membrane is not replaced in time, not only the water quality is not pure enough, but also if not handled properly, it can easily become a breeding ground for bacteria.

The service life of the ultrafiltration membrane equipment generally depends on the water quality and water quantity, but daily maintenance can also extend the service life of the filter element to a certain extent. In order to play a greater role in water purification, it is necessary to regularly replace the core membrane elements in the ultrafiltration membrane equipment. If the water quality is too poor, installing a pre-filter can protect the ultrafiltration membrane, prevent large particle impurities from entering, and cause the ultrafiltration membrane to become blocked too early, thereby shortening the service life of the ultrafiltration membrane equipment.

After a long period of interrupted water supply, a large amount of sediment, rust, and other substances will deposit in the water pipes. If the ultrafiltration membrane equipment is used directly, the sediment in the water pipes will enter the machine, causing the ultrafiltration membrane to become blocked, lack of water, or have a foul odor, affecting the normal use of the ultrafiltration membrane equipment. Therefore, sewage treatment should be carried out after the water is turned off to extend the service life of the ultrafiltration membrane equipment.

The above summarizes the relevant operation regulations for extending the service life of the ultrafiltration membrane. Everyone can protect the ultrafiltration membrane system by combining with the maintenance methods of the ultrafiltration membrane equipment to reduce operating costs. We hope the above content is helpful to everyone.