粒子・液体系分離における膜濾過工学の展開

概要

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One of the critical issues limiting the successful application of membrane filtration for treatment of drinking water and wastewater is typically membrane fouling of contaminants caused by pore clogging of the membrane and cake layer formation on the membrane surface during filtration. The present article delineates the importance of the electrostatic interactions of charged particles on the properties of a filter cake formed in membrane filtration. Additionally, a method is introduced for determining the compressibility of the filter cake based on a single constant pressure filtration test. This article describes theoretical derivation of a generalized characteristic form of classical blocking law, which had been most extensively used in the analysis of pore clogging of the membrane. In addition, the combined model of pore blocking and cake formation is discussed. Moreover, the development of an accurate model to explain the behavior of the irreversible pore clogging of the membrane, which will not fully recover by the simple physical backwashing, will become increasingly important, in order to establish efficient membrane-based water treatment technologies. It is finally shown that hybrid membrane filtration combined with the other separation methods proves to be useful in water treatment.
日本膜学会の論文