A BASIC STUDY ON ADSORPTION PROPERTIES OF SOLUTE ON MEMBRANES AND CONTROL OF MEMBRANE FOULING

溶质在膜上的吸附性能及膜污染控制的基础研究

• 批准号: 07650639
• 负责人: KISO Yoshiaki
• 金额: $ 1.47万
• 依托单位: TOYOHASHI UNIVERSITY OF TECHNOLOGY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1996
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07650639/
• 关键词: ADVANCED TREATMENT OF WASTEWATER; MEMBRANE FILTRATION; FOULING; ADSORPTION; LIQUID CHROMATOGRAPHY; OCTANOL; WATER PARTITION COEFFICIENT; MEMBRANE CLEANING; SURFACE ANALYSIS; 生物処理; 膜分離法; 高速液体クロマトグラフィー

Membrane filtration has been used for advanced treatment for wastewater treatment and especially membrane bioreactor has lately attracted attention as a new type advanced treatment process for wastewater. In membrane filtration process a common problem is control of membrane foluing. The objectives of this work were to clarify the adsorption properties of organic solutes on membrane materials and to characterize the fouling meterials on the used membranes for actual wastewater treatment.The adsorption properties were examined with high performance liquid chromatography using membrane materials, i.e.cellulose acetate (CA), alumina, and chlorinated polyethylene (PE), as a stationary phase. Although alumina did not adsorbed alcohols and benzene, organic compounds were adsorbed on CA and PE.In later case logarithm of capacity factor (log k'), which is an index of adsorption amount, were correlated linearly with octanol/water partition coefficient (log K_<o/w>). This indicated that the adso … More rption was controlled by hydrophobic interaction.Halogen as a substituent promoted the adsorption on CA at similar degree in comparison with carbonyl group. The adsorption of amino acids, nucleic base, and nucleotides were strongly influenced by pH.PE was especially adsorbed aromatic compounds and the adsorption amounts based on surface area of the stationary phase were larger at about 100 times than those for octadecil silane (ODS).The fouling materials on the membranes used for domestic wastewater treatment were analyzed by EPMA,XPS,and FTIR.It was observed that the fouling material on membrane surface was easily removed by membrane cleaning, but the results from elemental analysis for the membranes indicated that organic foulant was not removed completely. This and the results of membrane filtration experiment suggested that the removal of fouling material in membrane pore was necessary to recover the water flux. For this purpose the cleaning with sodium hypochlorite solution was effective. Less

膜过滤已被用于废水处理的深度处理，特别是膜生物反应器作为一种新型的废水深度处理工艺近年来备受关注。在膜过滤过程中，一个常见的问题是膜污染的控制。本工作的目的是阐明膜材料对有机溶质的吸附特性，并表征实际废水处理中使用的膜上的污垢物质。使用膜材料（即醋酸纤维素（CA）、氧化铝和氯化聚乙烯（PE））作为固定相，通过高效液相色谱法检测吸附特性。尽管氧化铝不吸附醇和苯，但有机化合物吸附在CA和PE上。在后来的情况下，作为吸附量指标的容量因子的对数(log k')与辛醇/水分配系数(log K_<o/w>)呈线性相关。这表明吸附作用是由疏水相互作用控制的。与羰基相比，卤素作为取代基以相似的程度促进了 CA 上的吸附。氨基酸、核酸、核苷酸的吸附受pH值影响较大。PE尤其吸附芳香族化合物，固定相表面积的吸附量比十八烷硅烷(ODS)大约100倍。通过EPMA、XPS和FTIR对生活污水处理膜上的污垢物质进行了分析。 通过膜清洗可以很容易地去除膜表面的污垢物质，但膜的元素分析结果表明有机污垢并未完全去除。这和膜过滤实验的结果表明，去除膜孔中的污垢物质对于恢复水通量是必要的。为此，使用次氯酸钠溶液进行清洁是有效的。较少的