研究论文
黄肖容,黄仲涛.不对称氧化铝膜管的微滤性能研究[J].环境科学学报,1998,18(5):466-470
不对称氧化铝膜管的微滤性能研究
- STUDY ON THE MICROFILTRATION OF THE ASYMMETRIC ALUMINA TUBULAR MEMBRANE
- 摘要：采用熔模离心法制备的不对称氧化铝微滤膜管的孔径沿径向呈梯度分布,控制层孔径均匀。最可几孔径为0.05μm、最大孔径为0.1μm的管能滤除原液中全部的细菌,获得完全无菌的水,但过滤速率太慢。最可几孔径为0.1μm、最大孔径为0.2μm的管能基本滤除原液中的全部细菌,获得无菌的水,过滤速率为0.45m3/(m2·h).最可几孔径为0.2μm、最大孔径0.3μm的氧化铝膜管能完全滤除水中的大肠杆菌、霉菌和酵母,细菌总滤除率大于95%, 水的错流微滤通量可稳定在1.59m3/(m2·h).这种孔径梯度分布的不对称氧化铝膜管能有效防止膜深层孔的堵塞,延长微滤膜管的寿命,细菌滤除性能、渗透性能恢复率良好,分别为100%和大于90%.可用作食品和饮料工业(水果汁)的液体过滤、水的微滤,除去0.1-10μm的微生物和微粒子,生产无菌液体、澄清液体和无菌水。
- Abstract：The alumina tubular membrane prepared by the meltable moulding centrifugal technique has gradient pore size distribution in cross section with the narrow pore size distribution of top layers(controlled layers). With the most pore size of 0.05μm, the largest pore size of 0.1μm alumina tubular membrane, very bright and entire sterile water is obtained. Using the tubular membrane of the most pore size of 0.1μm and the largest pore size of 0.2μm, the bacterium in the feed can be removed with stable microfiltration flux of 0.45m3/(m2·h). Near sterilizing filtration can be achieved using membranes of the most pore size of 0.2μm and the largest pore size of 0.3μm, escherichia coli, mold and yeast in water can be removed entirely, more than 95% of total bacteria contained in the water can be removed. The crossflow microfiltration flux starts at a high level and drops rapidly, approaching a steady state value of 1.59m3/(m2·h) for water. This kind of asymmetric tubular membrane minimizes deep pore fouling and plugging efficiently, easy cleaning, with 100% recovery of trapping efficiency and more than 90% recovery of flux efficiency. This kind of alumina tubular membrane can be used in the food and beverage industries and in water filtration to produced a clear sterile liquid and water by removing the contaminants such as microparticles of 0.1—10μm is diameter or bacterium.
摘要点击次数： 1819 全文下载次数： 3076
