This study treats an important and recent worldwide problem. It deals with the production of alternative bio-fuels from starchy restaurantsí waste in Saudi Arabia. Kingdom Saudi Arabia has many raw materials, among which the starchy wastes of the restaurants. Wasted-rice is main starchy waste, which is produced in million tons that costs millions of dollars. To achieve the main goal of this study, samples from 8 different resultants were collected and subjected for isolation of the endemic yeasts, then the samples were treated with different pretreatment. During the study, 46 yeast isolates were isolated from different types of wasted-rice. All yeast isolates were primary screened for their...