Method for reinforced ultrafiltration treatment of phenol-containing waste-water by ultrafiltration membrane

Abstract

The invention discloses a method for ultra-filtration membrane strengthened ultra-filtration treatment of phenol-containing sewage. The method comprises: first adding cetylpyridinium chloride which is a cationic surfactant, and sodium carbonate into the phenol-containing sewage, stirring uniformly and standing for reaction where cetylpyridinium chloride monomer molecules produce micelles by self-assembly and then solubilize the phenol contained in the water; pumping the water to an ultra-filtration component for filtration where the cetylpyridinium chloride micelles with being solubilized the phenol contained in the water are intercepted by the ultra-filtration membrane so that the phenol contained in the water is removed. The phenol concentration in the sewage is 5mg / L-200mg / L; the addition of cetylpyridinium chloride is 20*10<-3>mol / L-30*10<-3>mol / L; the addition of sodium carbonate is 1*10<-3>mol / L-20*10<-3>mol / L; the weight of molecules intercepted by the ultra-filtration membrane is 6000-10000Dalton; the membrane operation pressure is 0.05MPa-0.20MPa. The method is carried out in an intermittent type, and the standing reaction time is 0.5-10h. In treating the phenol-containing sewage, the invention has excellent phenol removal performance, low energy consumption, simple operation, low surfactant consumption and low cost. In addition, the surfactant and the phenol can be recycled.

Description

technical field [0001] The invention belongs to a membrane treatment method for organic wastewater, and in particular relates to a method for using an ultrafiltration membrane to strengthen ultrafiltration to treat phenol-containing wastewater. Background technique [0002] Phenol is an important basic organic synthetic raw material. This industry has developed rapidly in my country in recent years, and its output has increased rapidly. However, at the same time, the discharge of phenol-containing wastewater has also increased day by day, causing serious pollution. At present, the traditional treatment methods of phenol-containing wastewater include extraction method, adsorption method, chemical agent method, ultraviolet oxidation method and biological treatment method. The advantage of the extraction method is that the process is simple, the extractant can be reused, and it is suitable for wastewater with high phenol content; the disadvantage is that the energy consumption ...

AI Technical Summary

Problems solved by technology

However, the conditions are strictly controlled, the oxidant cannot be reused and the price is expensive, and the operation cost is high

The advantage of the ultraviolet oxidation method is that the removal efficiency of phenol is high; the disadvantage is that the treatment effect of phenol-containing wastewater with high COD value is poor

The advantage of biological treatment is high treatment efficiency and simple equipment; the disadvantage is that it occupies a large area and is only suitable for the treatment of phenol-containing wastewater with low COD value

Although the above methods have their own advantages and disadvantages, from the perspective of comprehensive treatment of phenol-containing wastewater, it is difficult to meet the requirements of stability, reliability and safety.