一体式光催化氧化-膜分离三相流化床反应器

耦合光催化氧化和有机膜分离技术,设计了一种新型一体式光催化氧化-膜分离三相流化床反应器;并通过利用颗粒状TiO2对酸性红B废水的降解实验,研究了反应器的基本性能。结果表明:一体式反应器中的膜组件可有效地分离TiO2,使其在反应器中循环使用。反应区曝气量是TiO2发生沉积的主要影响因素,且反应区曝气量以3.6m3/h为宜,而脱色率随TiO2质量浓度的增加呈现为先增加其后保持不变的变化趋势,最佳TiO2质量浓度为2g/L。膜组件底部的曝气装置可大大减轻膜污染,但并不对TiO2的沉积产生影响。一体式反应器可实现长期、稳定地运行。

Integrative three-phase fluidized-bed reactor coupling with photocatalysis and organic membrane separation

Coupling with the technology of photocatalysis and organic membrane separation,a new type of integrative three-phase fluidized-bed reactor of photocatalysis-organic membrane separation was designed and its fundamental performance was investigated by photocatalytic degrading acid red B wastewater with granular TiO2. The results show that TiO2 can be rejected by membrane module and reused in the reactor completely. The aeration flux in the reactive area is the main influence factor for the deposit of TiO2,and the optimal value is 3.6 m3/h. The decolorized efficiency increases with increasing TiO2 mass concentration firstly,and then keeps constant,and the best mass concentration is 2 g/L. The aeration device under membrane module can decrease membrane fouling greatly,but it doesn't influence the TiO2 deposit. The integrative reactor can realize a long-term and steady operation.