| 摘要 |
PURPOSE:To obtain ethanol useful as a fuel, etc., from a fine alga in a high yield by separating the ethanol from the culture slurry, treating the residual cells of the fine alga under specific conditions, and subsequently again supplying the treated cells to the ethanol-producing process for the reduction in the discharging volume of the solution containing organic components in high concentrations. CONSTITUTION:The method for producing the ethanol from the fine alga comprising culturing a fine alga accumulating starch in its cell, concentrating the culture slurry containing the cultured alga cells, holding the concentrated slurry in a dark and anaerobic atmosphere at a pH of 6.0-9.0 for producing the ethanol, separating the produced ethanol, returning the residual fine alga cells into the culture device, reaccumulating the starch by the photosynthesis reaction, and subsequently supplying the cells to the ethanol-producing process. |
