Sweet potato (SP), Ipomoea batatas L., is the world’s seventh most important food crop, which has a short cultivation period of 3-4 months. Tubers of SP are rich in carbohydrates and many other nutrients (12, 13). Therefore, SP is an interesting choice of substrate for lactic acid fermentation. In this research, lactic acid production from SP was studied using SSF by lactic acid bacterial starter. Optimal conditions for a hydrolysis of SP by α-amylase and an optimum temperature for SSF step were
investigated.