Discharges from dairies are very rich in organic matter. 900 m3/d of liquid waste is discharged daily by the milk processing unit of the City Rabat / Sal
The lactose in cheese whey is an interesting substrate for the production of bulk commodities such as bio-ethanol, due to the large amounts of whey surplus generated globally. In the present context of increasing demand for energy and biofuel, the microbial synthesis of ethanol using industry waste materials has gained recent importance. The present study deals with the ethanol production from whey-a dairy waste by using potential thermotolerant immobilized yeasts isolates in free and immobilized state. Two species of thermotolerant yeasts strains, Candida inconspicua, Candida xylopsoci and standard culture of K. marxianus were used for bioethanol production. Of the selected thermotolerant yeast species, Candida inconspicua W16 exhibited the maximum production of ethanol (3,9