According to Heilongjiang Daily News, April 13, 2019, sewage has become clear water, sea water has become fresh water, and rain has become a clean water. Scientists have been focusing on scientific research, and gravity-driven ceramic membrane filtration technology is an important technical means to achieve this goal. The mechanism of the filtration efficiency of ceramic membranes has not been clear for a long time. On the 12th, Harbin Institute of Technology carried out the latest technological achievements. The research group of the school’s environmental school, Ma Jun, first revealed the relationship between ceramic membranes and pollutants. The interaction relationship provides an important theoretical basis for ceramic membrane selection, preparation, modification and membrane filtration performance optimization, which is of great significance for water treatment.
According to reports, gravity-driven ceramic membrane is an important water treatment technology, which has attracted much attention due to its excellent characteristics such as low energy consumption, stable operation and simple maintenance. In water treatment, sewage treatment, reuse of water, separation of oil and water, Rainwater utilization, household drinking water treatment and seawater pretreatment have broad application potentials. However, the mechanism of pollutant interception and membrane fouling during the operation of gravity-driven membranes is the core issue affecting membrane filtration efficiency, and no “answer” has been found.
The spokesperson of the technical results told the reporter that the team of professors of Harbin Da Majun first revealed that the electrostatic interaction between the membrane and the contaminant under the condition of low pressure hydraulic force largely determines the filtration efficiency of the gravity driven ceramic membrane, and the electrostatic interaction of the membrane interface. The effect is significantly enhanced as the drive pressure is reduced. Therefore, by adjusting the electrical properties of the ceramic membrane interface, the filtration performance of the gravity-driven ceramic membrane will be greatly improved. This discovery will have a major impact on gravity-driven ceramic membrane technology, increasing water treatment efficiency and reducing water treatment costs.
This achievement has been published as a highlight in the internationally renowned journal Environmental Science and Technology.