光催化陶瓷平板膜反应器临界通量运行膜分离性能

发布时间：2018-10-24 19:46

【摘要】：针对光催化膜反应器中膜污染特性,采用通量阶式递增法测定了不同催化剂浓度及光照强度下光催化陶瓷平板膜反应器中临界膜通量的大小,对比了临界和超临界通量运行中膜分离性能.研究结果表明:当催化剂浓度为0.3g/L时,光照强度越高,临界通量越高.在临界通量为75L/(m~2·h)下运行相比超临界通量而言,其稳定运行周期更长,渗透出的滤液体积更多.临界通量运行过程中膜污染首先经历缓慢增长过程,随后变为加速膜污染过程.临界及超临界通量运行对UV254及UV436污染物总去除率均可以达到92%及98%以上,对DOC总去除率分别为72%及76.2%.临界通量运行时的总阻力、可逆污染阻力及不可逆污染阻力都低于超临界通量下对应的阻力,临界通量运行可有效提高光催化膜反应器中膜分离性能.
[Abstract]:According to the characteristics of membrane fouling in photocatalytic membrane reactor, the critical membrane flux in photocatalytic ceramic plate membrane reactor was determined by flux step increasing method under different catalyst concentration and light intensity. The performance of membrane separation during critical and supercritical flux operation was compared. The results show that the higher the light intensity, the higher the critical flux when the catalyst concentration is 0.3g/L. When the critical flux is 75L/ (2 h), the stable operation period is longer and the volume of filtrate permeated is more than that of supercritical flux. Membrane fouling experienced a slow growth process and then accelerated membrane fouling process during critical flux operation. The total removal rates of UV254 and UV436 by critical and supercritical fluxes were both 92% and 98% respectively, and the total removal rates of DOC were 72% and 76. 2%, respectively. The total resistance, reversible fouling resistance and irreversible fouling resistance of critical flux are lower than those of supercritical flux. Critical flux operation can effectively improve membrane separation performance in photocatalytic membrane reactor.
【作者单位】：九江学院化学与环境工程学院;江西省生态化工工程技术研究中心;
【基金】：国家自然科学基金项目(21566013)
【分类号】：X703.1

【相似文献】