成果報告書詳細
管理番号20120000001054
タイトル*平成23年度中間年報 最先端PG(Mega-ton Water System) 資源生産型革新的下水統合膜処理システム MBR+システムの開発 
公開日2012/9/28
報告書年度2011 - 2011
委託先名国立大学法人東京大学 三菱レイヨン株式会社 日本下水道事業団 東レ株式会社 函館工業高等専門学校
プロジェクト番号P09025
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コンパクトMBR(cMBR)
超コンパクト機能性中空糸膜モジュールを組み込んだ好気バイオマス生産槽の開発を目標として検討を行った。また、超コンパクト大型膜モジュール及び革新的物理化学洗浄機能を付加した機能性膜モジュールの開発について検討した。
英文要約“MBR+ System” consists of three modules: compact MBR (cMBR), hybrid membrane system (HMS)/forward osmosis (FO), and hydrothermal gasification (HTG). 1. cMBR: The aim of this group is to develop an aerobic biomass production reactor with novel membrane modules. 1-1. Establishment of sludge management under inclined tube equipped MBR (itMBR): A practical start-up operation was simulated, leading to a stable state within 1 month. Viscosity of mixed liquor was selected as an index for sludge concentration and its effectiveness for sludge management was confirmed. Under 2 h of HRT condition, >90% of organic removal was achieved whereas NH3 removal was <50%, which indicates successful suppression of nitrification. 1-2. Novel exploitation of membrane modules: MBR reactor for evaluation of membrane module performance was fabricated and installed. In addition, examinations on prefilter structure and materials using small modules were conducted. 1-3. Micro-flow analysis at membrane surface: A new micro-flow analysis system was established using blue laser, stereomicroscope and progressive video camera. Such set-up improvements enable us to observe fluctuation flow at membrane surface caused by baffle stick attached to the membrane module. 1-4. Development of self-cleaning membrane module: Fundamental investigations on electrochemical processes for membrane fouling control were conducted. An electrode-equipped membrane module was fabricated and its performance was tested. Current density and location of electrodes were proved to have a significant effect on membrane fouling. Results also indicated that intermittent operation under relatively low current density could mitigate membrane fouling. 2. HMS/FO: The aim of this study is to develop a system which realizes high water recovery and nutrient salts fixation from MBR treated water by using NF, RO, and FO membrane. 2-1. FO membrane filtration for concentration and recovery of nutrients: Overall nutrient rejection performance was sufficient for synthetic MBR effluent. Lower nitrogen rejection ratio was observed for real itMBR effluent, suggesting the need of pretreatment to increase the nitrogen recovery. 2-2. Hybrid membrane system utilizing NF/RO membrane: Bench scale plant installed with RO element was operated using MBR treated water. For continuous filtration experiments, bench scale plant was run at 75-90% water recovery. 3. HTG: The aim of this group is to demonstrate hydrothermal gasification of sewage sludge. Bench-scale batch reactor was used for supercritical water gasification (SCWG) of sewage sludge. Experience and challenges that have arisen during the experiment were presented. Effect of operational parameters was evaluated by yield and efficiencies of gas products. Meanwhile, pre-treating process such as subcritical water liquefaction and metal removal was investigated. Finally, a calculation on energy balance of continuous sewage sludge SCWG system was conducted for process evaluation.
ダウンロード成果報告書データベース(ユーザ登録必須)から、ダウンロードしてください。

▲トップに戻る