Optimization of energy recovery efficiency from sweet sorghum stems by ethanol and methane fermentation processes coupling.

Taken separately, a single sweet sorghum stem bioconversion process for bioethanol and biomethane production only leads to a partial conversion of organic matter. The direct fermentation of crushed whole stem coupled with the methanization of the subsequent solid residues in a two-stage process was experimented to improve energy bioconversion yield, efficiency, and profitability. The raw stalk calorific value was 17,144.

Innovation in Tigernut ( L.) Milk Production: In Situ Hydrolysis of Starch.

Tigernut tubers () are used for the production of vegetable milk, commonly known as "Horchata de chufa" in Spain. The presence of starch in the tuber limits the yield of the milk, since this carbohydrate gelatinizes during the pasteurization of the milk and leads to the considerable solidification of this drink. The present work aims to improve the yields and extraction practice of the milk by an in situ hydrolysis of starch, using exogenous amylases of industrial or vegetable origin.