NOVELTY - A wastewater obtained from production of saponin from yellow ginger is treated and recycled, by adding quicklime powder to waste mother liquor of yellow ginger; settling the lime; heating supernatant fluid with sugar content of over 95%; fermenting with activated wine yeast, pectinase, cellulase and nitrogen-containing compound; distilling 95% alcohol from treated waste mother liquor; discharging remaining wastewater into the settling tank; filtering and separating; delivering the water at 50-60 degrees C into an evaporator to save 30% of fuel; and delivering vapor into the production process.    USE - Treating and recycling wastewater obtained from production of saponin from yellow ginger (claimed).    DETAILED DESCRIPTION - Treating and recycling wastewater obtained from production of saponin from yellow ginger, comprises:    (A) filling waste mother liquor of yellow ginger after acid hydrolysis in a neutralizing tank, adding quicklime powder (1-7 wt.%), stirring until pH value is 5, and feeding the mixture to a settling tank;    (B) filling supernatant fluid with sugar content of over 95% in a fermenting tank after the lime is settled to the bottom, heating to 38 degrees C, feeding 0.7%o activated wine yeast, 0.2%o pectinase, 0.3%o cellulase and 1.4%o nitrogen-containing compound into the fermenting liquid, and fermenting at 32-38 degrees C for 3 days;    (C) filling the treated waste mother liquor in an alcohol column for distillation, distilling out 95% alcohol (3.0-3.6 wt.%) until chemical oxygen demand (COD) of residual wastewater in the column is 1000 and pH value remains at 5-6 with light color, and discharging remaining wastewater into the settling tank from the column to settle; and    (D) filtering via a sand pump and separating via a macromolecular film to obtain a treated water, delivering the water at 50-60 degrees C into an evaporator to save 30% of fuel, and delivering vapor into the production process so that no wastewater is discharged.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic flow diagram of a method for treating and recycling wastewater obtained from production of saponin from yellow ginger. (Drawing includes non-English language text)