亜臨界水処理による未利用バイオマスの資源・エネルギー化(<特集>RGB三部会[リサイクル・ガス化・バイオマス]合同シンポジウム-廃棄物,バイオマス,石炭等利用技術の最新動向-)

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We proposed conversion of organic wastes to useful resources and/or energy using sub-critical water treatment. Sub-critical water hydrolyzed organic matters to peptides, amino acids, lactic acid and other organic acids, sugars, and so on in short reaction time such as 1 to 20min. When oil existed in an organic matter, almost all the oil was instantly extracted by sub-critical water. After separating valuable matters from the matters produced by sub-critical water treatment of organic wastes, residues were treated by methane fermentation. Conventional methane fermentation takes one to two months, but after sub-critical water treatment, the fermentation time reduced to 3 to 14 days. Digestibility in the conventional methane fermentation is less than 50% but sub-critical water treatment enables it to increase to more than 80%. Experimental results of conversion of fish wastes to valuable materials by sub-criticalwater treatment were shown. The effect of sub-critical water treatment of sewage sludge on the methane fermentation was shown. After sub-critical water pretreatment of the sewage sludge, production of methane gas increased about two times larger than the conventional methane fermentation. A new belt-type continuous and complete separation method of phosphate from the matters produced by sub-critical water treatment of sewage sludge was shown. Finally continuous sub-critical water treatment plants of pilot scale and industrial scale constructed in Japan were introduced.
2011-03-20

亜臨界水処理による未利用バイオマスの資源・エネルギー化(<特集>RGB三部会[リサイクル・ガス化・バイオマス]合同シンポジウム-廃棄物,バイオマス,石炭等利用技術の最新動向-)

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