陶瓷膜技术过滤0^#柴油废水的试验

Test of Ceramic Membrane Treatment of Diesel Oil 0^# Wastewater

在胶束技术基础上,结合一种由简单金属盐和NaOH通过错流过滤方式形成的氢氧化物动态陶瓷膜,对0#柴油废水进行去除试验。结果表明,在1 g/L MgCl2和1 g/L FeCl3分别作为成膜盐的试验中MgCl2处理效果更佳。在表面活性剂十二烷基苯磺酸钠(SDBS)处于临界胶束浓度1.2 mmol/L条件时,当MgCl2溶液质量浓度为0.2 g/L,pH=10.3时柴油去除效果最好可达92.3%,此时渗透通量也较大。还发现在上述条件下,若加入纳米SiO20.5 g/L,不仅能使柴油拦截率快速增加到99.3%,成膜和废水处理时稳定通量分别提高为5.25×10-3L/(m2.h.Pa)和3.17×10-3L/(m2.h.Pa)。

The removal of diesel oil 0# in wastowater through micellar technology combined with dynamic ceramic membrane of metal hydroxide which is easily made by a simple salt and sodium hydroxide is studied in this paper. This now membrane is formed by cross - flow filtration proceas.The results show that to magnesium chloride and high - speed rail,whan all the two salts＇ concentration were 1 g/L, magnesium chloride is the more suitable salt for dynamic membrane formation on the ceramic support. When surfactant （SDBS） is at the critical micelle concentration of 1.2 mmol/L, concentration of maoaesium chloride is 0.2 g/L and pH = 10.3,the removal of the diesel oil can reach 92.3% and the permneation flux also keeps in a higher level. On this basis, if adding nano SiO2 of 0. 5 g/L, the diesel oil interception rate would rise to more than99% in a short time and also the permeation flux can reach to5.25× 10^-3L/（m^2.h.Pa） and 3.17× 10^-3L/（m^2.h. Pa） in formation and treatment processes.