The two yeaststrainsYP2 and YZ13were isolated from Chinese-spirit fermenting grains and they could all grow well under the condition of pH 3.0.Strain YP2 was identified as belonging to Candida and the similarity degree of strain YP2 and Candida pseudolambica(KM384061.1)reached 98%,while strain YZ13 to Pichiaand the similarity degree with Pichia kudriavzevii(LC014798.1)reached 100%.The two strains were mixed at the ratio of 1∶1in weight and applied to the fermentation of waste fermenting grains.The process o...