After years of development in the industry, membrane technology has a good performance in water treatment. However, there are still some problems to be solved, especially membrane fouling and membrane life. With the improvement of environmental protection standards, inorganic ceramic membrane technology has ushered in the spring of development.

The main components of oily washing wastewater from oil plant include saponin horn, oil, phospholipid, protein, colloid, pigment, etc. It usually comes from the production process of oil refining, fatty acid, margarine, mayonnaise and so on. It causes serious environmental pollution and can only be discharged after reaching the standard. The traditional process adopts "oil separation, flotation and biochemical treatment" to treat almost emulsified refining wastewater, which is difficult, complex operation and high cost. The application of membrane separation technology for fine pretreatment of wastewater will greatly reduce COD and oil content, not only reduce the burden of subsequent biochemical treatment, but also recover a large amount of waste oil and saponin, save operation cost and ensure that the discharge meets the standard.

NanoMem ceramic membrane filtration technology can be used to filter the solution before ion exchange in Tungsten Hydrometallurgy. Practice has proved that the use of ceramic membrane elements can obtain better filtration effect, and the turbidity of tungsten after treatment can be reduced to less than 1ntu. In addition, the ceramic membrane has good regeneration. After cleaning with acid and alkali, the flux can be restored to more than 98%. It can greatly shorten the production process and realize full automatic production.

Compared with many organic membranes, inorganic ceramic membranes have the advantages of high temperature resistance, stable structure, uniform pore size distribution, good chemical stability, not easy to be eroded by microorganisms, high mechanical strength and easy regeneration. This characteristic determines its wide application in water treatment.

In the process of wet process phosphoric acid production, the filter cloth is easy to wear due to calcium sulfate crystallization, iron aluminum salt precipitation, small fluosilicate particles and so on.