O3-PAC-陶瓷膜耦合技术处理苯酚废水性能研究

Study on the performance of O3-PAC-ceramic membrane coupling technology for phenol wastewater treatment

  • 摘要: 臭氧-粉末活性炭(O3-PAC)废水处理技术具备发展潜力,但废水与PAC无法有效分离成为该技术的瓶颈。利用陶瓷膜技术构建了O3-PAC-陶瓷膜去除苯酚耦合体系,采用反应动力学、串联阻力模型以及Hermans-Bredee模型分别对COD去除和PAC膜分离性能进行研究。结果表明:O3-PAC在40 min内对COD去除率达到100%,反应速率是臭氧-颗粒活性炭(O3-GAC)的2.5倍;采用陶瓷膜对PAC和废水进行分离,操作压力超过0.06 MPa时,可逆污染向不可逆污染转化;膜污染是由完全堵塞向滤饼堵塞转化的过程,提高废水在膜表面的流速可以破坏滤饼层的形成;试验连续进行6个周期后,40 min时模拟废水的COD去除率保持在95%以上,但不可逆污染有增加的趋势。

     

    Abstract: Ozone-powdered activated carbon (O3-PAC) wastewater treatment technology has good development potential, but the inability to effectively separate wastewater from PAC has become the technology bottleneck. A coupled O3-PAC-ceramic membrane technology system was constructed with phenol as the target pollutant. The technology was investigated in terms of the performance of COD removal and membrane separation of PAC by reaction kinetics, the tandem resistance model and the Hermans-Bredee model, respectively. The results showed that O3-PAC was able to achieve 100% COD removal within 40 min, and the reaction rate was 2.5 times that of O3-GAC. PAC and wastewater were separated by the ceramic membrane, and when the operating pressure exceeded 0.06 MPa, the reversible contamination was converted to irreversible contamination. Membrane contamination was a process of conversion from complete blockage to filter cake blockage, and increasing the wastewater flow rate on the membrane surface could destroy the formation of the filter cake layer. After six consecutive cycles of the experiment, COD removal rate of the simulated wastewater at 40 min remained above 95%, but the irreversible contamination of the ceramic membrane tended to increase.

     

/

返回文章
返回