Treatment of Fermentation Stillage of Traditional Liquor SHOCHU by Low-temperature Catalytic Gasification

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  • 低温ガス化による焼酎廃液の処理
  • テイオン ガスカ ニ ヨル ショウチュウ ハイエキ ノ ショリ

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Abstract

Fermentation stillage (moisture 92.7wt%, SS 2.45wt%, TOC 37, 186mg/l, pH3.1) of the traditional liquor SHOCHU was treated by low-temperature catalytic gasification using a metal nickel catalyst at 350°C and 19.3 MPa. The treated water had no color, its TOC was 337mg/l and pH7.1. The TOC removal reached to higher than 99%, and CH4and H2 rich fuel gas was produced. Nitrogen in the stillage was almost converted into NH4, dissolved in the treated water. The estimation of chemical equilibrium suggests that nitrogen can be nitrogen gas (N2), not NH3, at the reaction conditions.

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