TECHNOLOGY FOCUS - BIOLOGY - Preferred Components: The alcohol-producing microorganism is: Clostridium, preferably Clostridium pasteurianum; and obtained from genetic modification. The biomass is sugar biomass, lignocellulose biomass, seaweed biomass or organic waste.    TECHNOLOGY FOCUS - BIOTECHNOLOGY - Preferred Method: The method comprises preparing the waste fermented solution medium prior to the culturing, by: fermenting biomass in medium containing yeast; and distilling the fermented solution and obtaining the resulting distillate. The step of preparing the waste fermented solution medium further comprises: adding the distillate to the medium for the fermenting and circulating again at least once and then obtaining the resulting distillate; centrifuging or filtering the distillate to obtain a filtrate with the yeast removed; adding the filtrate again to the medium for the fermenting and circulating again at least once and then obtaining the resulting distillate or filtrate. The pH of the waste fermented solution medium is adjusted using an alkaline agent in the culturing. The method comprises removing lactic acid for the concentration of less than 10 g/l in the culturing.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Components: The alkaline agent is sodium hydroxide, potassium hydroxide, calcium hydroxide or ammonia water.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Components: The waste fermented solution medium comprises: glycerol or lactic acid; at least one organic matter including hexose, pentose, disaccharide, polysaccharide, and/or hydrolyzed protein; or at least one acetic acid and/or ethanol, which are used in the culturing. The concentration of glycerol is 10-40 g/l. The concentration of lactic acid, acetic acid or ethanol is less than or equal to 10 g/l. EXAMPLE - Glucose (220 g), monopotassium phosphate (3 g), ammonium sulfate (7.5 g), disodium hydrogen phosphate (1.19 g), L-glutamic acid (2.18 g), D-/L-lactic acid (5 g), magnesium sulfate (0.5 g), zinc sulfate (0.04 g), manganese sulfate (0.0052 g), cobalt chloride (0.0005 g), copper sulfate (0.0009 g), sodium molybdate (0.00006 g), calcium chloride (0.023 g), ammonium ferrous sulfate (0.023 g), boric acid (0.003 g), calcium pantothenate (0.0108 g), nicotinic acid (0.0108 g), myo-inositol (0.2688 g), thiamine (0.0108 g), pyridoxine (0.0108 g) para-aminobenzoic acid (0.00022 g) and D-biotin (0.00003 g) were dissolved in distilled water (1 l), and the pH was adjusted to 5 using potassium hydroxide. After placing the medium (250 ml) in a 500-ml Erlenmeyer flask, the flask was sealed by capping. After sterilizing under high pressure and inoculating Saccharomyces cerevisiae cultured for 1-2 days at 10 vol/vol.%, then the yeast was cultured at 30 degrees C for 4 days while shaking at 130 rpm to give ethanol (106.4 g/l).