Study On The Treatment Process Of Aniline From Waste Water Using Micellar-enhanced Ultrafiltration

Chemical industry has entered a rapid development period In the past few years in China. Chemical industry produce large amounts of waste water containing aniline, because aniline was widely used. And it endangers the environment and human health. Since the Conventional techniques to treat aniline wastewater had limitations, they cannot be used widely. Micellar-enhanced ultrafiltration (MEUF) was widespread concern, because of its features in energy saving, high degree of automation, simple operation and good effect in removing pollution. This study focused on aniline wastewater with MEUF. Rhamnolipid was applied as the surfactant. This will have a broad prospect.First, the article described the nature of aniline, explosive and other hazardous, revealed the advantages and disadvantages of aniline conventional processing technology, introduced the technology of MEUF.MEUF composed of ultrafiltration membrane, surfactant, pollutants and ultrafiltration equipment. The article discussed the factor including the surfactant concentration, the concentration of pollutants, pressure, pH, electrolyte, temperature and surfactant complex, which affect the treatment effect. Experiment was divided into two parts. The first part chose SDS as surfactant. Experiment studied four factors of SDS concentration, pH, salinity and temperature on the effect of retention and membrane permeation flux, primary and secondary order and mechanism of MEUF removing aniline. The second part blend rhamnolipid and SDS. Experiment studied five factors of mixed proportion, pH, salinity, operating pressure and concentration of aniline on the effect of retention and membrane permeation flux, primary and secondary order and mechanism of MEUF removing aniline using combinational surfactant.The study found that aniline rejection increased with increasing of SDS concentration; decreased with increasing of temperature, pH and electrolytes concentration. Permeate flux increased with the rise of temperature, decreased with increasing of SDS concentration and electrolytes concentration, remained the same with pH changing. The importance of the factors on aniline rejection was pH>SDS concentration>electrolytes concentration>temperature. The importance of the factors on permeate flux was temperature>SDS concentration>electrolytes concentration>pH. Aniline rejection increased with increasing of mixed proportion; slowly rose and then decreased with increasing of pH value and aniline concentration; along with the increase of salinity first increased then decreased; decreased with increasing of pressure. Permeate flux decreased with the rise of the mixed proportion; increased with increasing of pH and pressure; remained the same with aniline concentration changing. The importance of the factors on aniline rejection was pH> mixed proportion>pressure>aniline concentration>electrolytes concentration. The importance of the factors on permeate flux was mixed proportion>operating pressure>electrolytes concentration>pH>aniline concentration.