成果報告書詳細
管理番号20130000000227
タイトル*平成22年度中間年報 新エネルギーベンチャー技術革新事業 新エネルギーベンチャー技術革新事業(バイオマス) セルロース系繊維廃棄物からの省エネ型バイオエタノール製造技術開発
公開日2013/11/20
報告書年度2010 - 2010
委託先名学校法人関西大学  株式会社エコログ・リサイクリング・ジャパン  兵庫県立工業技術センター
プロジェクト番号P10020
部署名技術開発推進部
和文要約
英文要約Title: New Energy Venture Business Technology Innovation Program / New Energy Venture Business Innovation Program (Biomass) /Development of bio-ethanol manufacturing technique with energy saving from cellulosic fiber waste (FY2010-FY2011) FY2010 Annual Report.

In this project, it is a main object to produce and sell a novel plant composed of glycolyzing, fermentation and concentration apparatus. First of all, we tried to improve a membrane separation apparatus to obtain an aqueous solution of 80wt% ethanol with the permeation rate, 1kg/m2h from an aqueous solution of 5 wt% ethanol produced by fermentation. In concretely, 5 wt% fermentative ethanol solution was applied to a previously developed temperature-difference controlled evapomeation (TDEV) with commercial porous polyethylene (PE) membrane. The ethanol solution of 5 wt% could not be concentrated to 80 wt% ethanol in one step but could be achieved 80wt% ethanol with permeation rate of 1.65kg/m2h in three steps. These results suggest that an aim on our project can be achieved. Based on the above results, a new TDEV apparatus for laboratory type was designed and set up. In this new TDEV apparatus, several porous membranes could be set. On the other hand, a porous hollow fiber membrane was applied to this new TEDV apparatus to enhance the membrane performance. Ideal porous membranes applied to TDEV have small pore size and higher porosity. In order to prepare such ideal porous membranes, electrospinning technique was applied. The state of pore in commercial porous membranes is crake like but those fabricated by the electrospinning technique is smooth and they have high porosity. Their pore size could be controlled by press method. When the polyethylene terephthalate (PET) fiber membrane made by electrospinning was applied to TDEV, an aqueous solution of 10wt% ethanol was concentrated 42wt% with the permeation rate of 0.60 kg/m2h. Those were higher than those in a commercial PE membrane and furthermore a PET membrane prepared on the metal mesh showed higher permeation rate (0.68 kg/m2h) and higher ethanol concentration (47.2 wt%). In this project, the above-mentioned ethanol solution of 5 wt% was produced from waste cotton cellulose, which had been previously decomposed to glucose enzymatically and then followed by ethanol fermentation.Large amounts of waste cotton selvedges are derived from textile industry, and they are not used effectively being carried to incinerators. In NISHIWAKI textile industrial area in HYOUGO prefecture, more than 100 tons of cotton selvedges or thrums are wasted and burned up in a year. Cotton is useful biomass consisting of 90% cellulose. In our investigation,the water-insoluble cotton was washed with acidic electrolyzed water to remove attached microorganisms and then suspended in the water. The cotton suspension was enzymatically decomposed to glucose in a flask with acryl-balls under vigorous agitation. The enzyme reaction system was contrived newly by us. The obtained glucose was converted completely to ethanol with bakery dry yeasts. In this fermentation process, any fermentor for yeast cultivation is not necessary. Consequently ethanol could be produced by a small and economical apparatus, which is now being designed for commercial plant.
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