Application of acid hydrolysis and fermentation to barley hulls for the production of bioethanol (#1938)

Authors

López Castro, Carmen Zoila

Alfaro Rodríguez, Carlos Humberto

Mendoza Nolorbe, Juan Neil

Ramos Torres, Ernesto

Ramirez Acuña, Jhony Hermenegildo

Moscoso Sanchez, Jorge Elías

Rubiños Jimenez, Santiago Linder

Abstract

In the Peruvian brewing industry, approximately 60% of the barley grain is used for beer production, while the other 40% is lost in the husk. In order to make the most of the lignocellulosic residue contained in the barley husk in a different way, the main objective of this research is to obtain bioethanol through acid hydrolysis and fermentation using yeast as a microorganism capable of decomposing the substrate. The result was obtained after making changes in temperature, acid and yeast concentration that the highest concentration of ethanol was 33.58%, the color of the solution was light brown and that the boiling temperature is 84.43°C. It is concluded that temperature and acid concentration have a positive effect on the hydrolysis of the compound but there is a point where additional increases may not be as beneficial. To optimize the process, the cost-benefit of using higher acid concentrations and temperatures must be evaluated.