How to Treat Industrial Wastewater by Flat Ceramic Membrane?

Industrial wastewater is generally acid-base, containing organic solvents and other special characteristics. Traditional organic membrane is usually difficult to deal with the harsh and complex waste water, while flat ceramic membrane can run stably in these extreme environments for a long time due because of its material advantages. For example, oilfield produced water, petrochemical plant wastewater, metal surface cleaning wastewater, emulsion wastewater and other oil-bearing wastewater, which are difficult to be treated by conventional methods. It need to use the hydrophilic hydrophobicity of ceramic membrane to effectively remove oil from industrial wastewater. The oil removal rate of alumina ceramic membrane can reach more than 99% in the treatment of emulsified oil wastewater. If combined with microfiltration / nanofiltration, the oil removal rate can be increased to more than 99.5%, and the advantages are very significant.

Anhui NanoMem S&T co., ltd. modified the porous ceramic membrane surface with super hydrophilic and oil repellent, forming a functional ultrafiltration ceramic membrane with strong anti pollution. It can use the surface tension to form a dynamic water membrane on the membrane surface, which can reduce the pore plugging and surface oil pollution caused by particle pollutants, and effectively prevent the growth of microorganisms on the membrane surface. This kind of ceramic membrane has higher pollution resistance and three times chemical cleaning cycle than common ceramic membrane, which is expected to break through the bottleneck of current development technology of offshore low-permeability oil field in China.

In addition to oil-bearing wastewater, papermaking pulp industrial wastewater is the main source of COD (chemical oxygen demand). Compared with the traditional treatment method, ultrafiltration ceramic membrane technology is used to intercept and filter COD and lignin, with the rejection rate of 49.4% and 90% respectively. It can realize the direct recovery and reuse of permeate.