成果報告書詳細
管理番号20130000000886
タイトル*平成24年度中間年報 バイオマスエネルギー技術研究開発 戦略的次世代バイオマスエネルギー利用技術開発事業(実用化技術開発)「馬鈴薯澱粉製造時に発生する廃水・廃棄物をモデル原料とする水熱可溶化技術を組み合わせたコンパクトメタン発酵システムの研究開発」
公開日2014/6/21
報告書年度2012 - 2012
委託先名株式会社竹中土木 株式会社竹中工務店
プロジェクト番号P10010
部署名新エネルギー部
和文要約
英文要約Title: Research and development of a compact methane fermentation system combining hydrothermal solubilization technologies and utilizing wastewater and solid waste generated during potato starch manufacturing as model materials (FY2011-FY2012) FY2012 annual report

We developed a compact system capable of efficient methane fermentation of hydrocyclone wastewater and potato starch residue, which are generated in large volumes from potato starch production, by combining organic matter condensation by membrane separation and molecular size reduction by hydrothermal solubilization. The system process consists of the separation and condensation of hydrocyclone wastewater by use of submerged membrane, mixing with potato starch residue, molecular size reduction by hydrothermal treatment, and further condensation of the obtained liquid by using a multi-stage membrane system, and methane fermentation. The development of submerged membrane and multi-stage membrane systems was done by Takenaka Civil Engineering and Construction Co., Ltd.; the development of hydrothermal solubilization and compact methane fermentation systems and system integration and evaluation by Takenaka Corporation; and the field test at the Bihoro potato starch factory by the two companies. (1) Submerged membrane separation system: This system was completed by laying submerged membrane tank piping and fabricating the control unit. The system was tested independently from September to mid-November, 2012, for performance verification. (2) Hydrothermal solubilization system: This system mixes the solid condensed by the submerged membrane system with starch residue and treats the mixture by letting it flow continuously. The system was run independently from September to mid-November, 2012, by using water, simulated slurry and starch residue to verify feed rate constancy. (3) Multi-stage separation system: On the basis of separation test results obtained by using simple apparatus last year, the design and fabrication of the multi-stage membrane system was completed in FY2012. The system was tested independently from September to mid-November, and the liquid separated from the solid by hydrothermal solubilization (upstream process) was fed to the system. Both first-stage NF membrane and second-stage RO membrane made treatment possible without causing any problem with the water intake or washing mechanisms. (4) Compact methane fermentation system: On the basis of basic test results obtained last year, the design and fabrication of the methane fermentation system was completed. The independent test conducted from September to mid-November did not indicate any problem in system operation but revealed some problems associated with the heating method and heating capacity. (5) System integration and evaluation: The fabrication of the four systems for process integration was completed in the first half of FY2012. Independent tests revealed some system-specific and overall integration problems. (6) Field test and follow-up: System installation for field testing was completed. From September to mid-November, 2012, performance verification tests involving a total of seven operators were conducted over a period of 80 days.
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