成果報告書詳細
管理番号20110000000913
タイトル*平成22年度中間年報 省水型・環境調和型水循環プロジェクト 水循環要素技術研究開発 革新的膜分離技術の開発 うちNF膜の開発(H21-H24)
公開日2011/7/28
報告書年度2010 - 2010
委託先名日東電工株式会社
プロジェクト番号P09011
部署名環境部
和文要約和文要約等以下本編抜粋:1.研究開発の内容及び成果等 (1)はじめに 本研究開発は、平成22年度から平成23年度の期間において、安全な水を継続的に確保するための目標として主にNF膜の透過性能を向上させて既存システムの消費エネルギーに対して20%削減することであり、(1)極超低圧NF膜開発、(2)膜構造解析、(3)モジュール設計およびシステム設計、(4)フィールドのグループで検証を行いの研究開発を行った。
英文要約Research and Development Item 1:Development of Elemental Technology for Water Circulation 1) Development of Innovative Separation Membrane Technology 」 (FY2010-FY2011)FY2010 Annual Report (a)-1 Development of High-flux NF/RO Membrane through Organic-Inorganic Hybridization:Using various inorganic solutes and characterizing permeation-performance related with conditions of membrane preparation, we demonstratemembranepermeation-mechanism affected by inorganic additives through conducting Microstructure characterization. (a)-2 Development of Organic/Inorganic Hybrid NF Membranes Preparation Technology:Based on the results of patent survey & literature research on noble technology and materials in FY-2008, we suggested concepts how to make high-flux membrane. We conducted a trial manufacturing-scale production using our production equipment at SHIGA Plant and completed a development of high-flux NF membrane. We confirmed these elements satisfying the energy-saving by 20% versus conventional NF membrane which is our midterm target of this national project.(b)-1 Simulation Analysis of NF Membrane Permeability:We measured the pore size of the NF membrane by using widths and solute permeability of low-molecules consisting of various organic solvents, the size of which indicated the same size level as the space (of a 0.6nm radius ) calculated from PALS method.We will conduct to design the high-flux membrane with keeping rejection performance with measuring a tendency of inter-molecule-vacancy for designing conditions of membrane development based on the analyzed results.(c)-1 Manufacturing, Evaluation and Verification of Innovative Ultra-Ultra-Low Pressure NF (UULP-NF) Membrane Spiral Module:Testing various candidates of feed spacers in a flat-sheet cell, we evaluated the effect on delta-P, membrane-fouling, cleaning recovery and membrane performance.By respectively comparing performances with testing items, we found characteristics of feed spacers. In the evaluation of membrane fouling especially, we confirmed that the results applying fluid analysis (CFD calculation) corresponds to actual phenomenon. (d)-1 Analysis of Water Quality in Long-Term NF Membrane Operation of MBR Purification System: we started field test using the flat-sheet membrane cells with actual sewage effluent. The initial permeate performance of new NF membrane maintained the same level as the initial membrane product performance, and it was confirmed that the field test performance with actual sewage maintained the high permeability.(d)-2 Demonstration of Long-Term NF Membrane Operation in MBR Purification System:As the effect of membrane-fouling on membrane permeability, results of verifying the membrane of after-field-test showed that deposited cake on the membrane surface existed very little. It became clear that the organic substance (originated in the microorganism metabolic product) and silica as an inorganic substance have a big influence on decreasing the permeability by examining the relationship between the material extracted by the cleaning and the permeability recovered by chemicals cleaning for the RO membrane.
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