Examinando por Autor "Murillo-Araya, Luis C."

Mostrando 1 - 2 de 2

Dual-Route Nanocellulose Production from Pineapple Waste: A Comparative Environmental and Process Evaluation of Acid Hydrolysis and Bacterial Biosynthesis
(Multidisciplinary Digital Publishing Institute (MDPI) (Suiza), 2025) Murillo-Araya, Luis C.; Camacho-Elizondo, Melissa; Batista Meneses, Diego; Jose-Roberto, Vega-Baudrit; Lopretti, Mary; Lecot, Nicole; Montes de Oca-Vásquez, Gabriela
Abstract. This study compares two methods for extracting nanocellulose from pineapple agro-waste: chemical hydrolysis using sulfuric acid, and bacterial biosynthesis via Rhizobium leguminosarum biovar trifolii. SEM, FTIR, and AFM characterized nanocellulose produced by both routes. A multi-criteria decision matrix was used to evaluate process efficiency, environmental impact, and operational complexity. The bacterial route showed advantages in water footprint (0.3 L vs. 14 L), purification simplicity (~2 steps vs. ~5), and waste safety (non-hazardous vs. highly corrosive). AFM analysis revealed thinner fibers in bacterial nanocellulose (~37 nm) compared to the chemical route (~70 nm). Radar chart visualization reinforced these findings. Results support bacterial biosynthesis as a more sustainable and scalable alternative for nanocellulose production from lignocellulosic residues.
Pretreatment methods of lignocellulosic wastes into value-added products: recent advances and possibilities
(Springer (Alemania), 2022) Batista Meneses, Diego; Montes de Oca-Vásquez, Gabriela; Jose-Roberto, Vega-Baudrit; Rojas-Álvarez, Mauricio; Corrales-Castillo, Joshua; Murillo-Araya, Luis C.
Abstract. A number of industries currently produce many tons of agroindustrial wastes with significant consequences on the environment and human and animal health. In recent years, increasing emphasis has been placed on reducing this negative impact. This review article aims to investigate the use of pretreatmentmethods that can be applied as an alternative to the usage of residual biomass. In addition, we seek to highlight the efficiency of the processes as well as possible weaknesses, which are associated with high energy and reagent consumption, low yields, and possible secondary impacts. Generally, the waste chemical composition consists mainly of cellulose, hemicellulose, and lignin; these can be fractionated, extracted, and purified to produce different value-added products, such as biofuels, organic acids, enzymes, biopolymers, and chemical additives. Despite the multiple possibilities to produce different products from lignocellulosic biomass, further research is still required to enhance the efficiency of the methods used nowadays and find new procedures.