充气膜吸收技术回收废水中挥发性污染物研究

Recovery of volatile pollutants from wastewater with gas filled membrane absorption

介绍了充气膜吸收技术的基本原理,讨论了应用该技术分离和回收废水中挥发性污染物的影响因素。研究结果表明,挥发性污染物的传质速率与吸收液的浓度和流量无关;化学吸收比真空抽吸和压缩空气吹扫对挥发性污染物具有更高的去除率;挥发性污染物的传质速率与膜性能有关;随着废水中共存的其他挥发物比例的增加,所分离和回收的挥发性污染物的传质速率也相应降低。

The basic theory of Gas Filled Membrane Absorption (GFMA) was introduced briefly. The influencing factors were discussed in detail for the separation and recovery of volatile pollutants from wastewater with GF-MA. The experimental results showed that the mass transfer rate of volatile pollutants was independent on concentration and absorption solution,but dependent on membrane property;compared to vaccum and air blowing,chemical absorption had the higher removal efficiency of volatile pollutants;the mass transfer rate of volatile pollutants decreased correspondingly with the increase of other volatile components co-existing in wastewater.