Theoretical modeling and experimental validation of hydrodynamic cavitation reactor with a Venturi tube for sugarcane bagasse pretreatment. (September 2020)

• Record Type: Journal Article
• Authors: Bimestre, Thiago Averaldo; Júnior, José Antonio Mantovani; Botura, César Augusto; Canettieri, ElianaVieira; Tuna, Celso Eduardo
• Is Part Of: Bioresource technology. Volume 311(2020)
• Publication Date: 2020-09
• Subjects: Hydrodynamic cavitation -- Alkaline pretreatment -- Response surface methodology (RSM) -- Venturi tube -- Sugarcane bagasse; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2020.123540
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Theoretical modeling of a hydrodynamic cavitation (HC) reactor with Venturi tube. HC assisted alkaline pretreatment was employed for lignin removal. Pretreatment was statistically optimized and experimentally verified. Under the optimal condition, the maximum lignin removal was 56.01%. Abstract: A hydrodynamic cavitation reactor with a Venturi tube was modeled through a computational fluid dynamics approach in order to evaluate the influence of pressure ratio, diameter and length of the throat zone. A cavitation reactor equipped with a Venturi tube was built in accordance with the computational modeling results. Hydrodynamic cavitation assisted alkaline pretreatment was performed to evaluate the influence of NaOH concentration (1–5%), the weight to volume percentage of solid in liquid (1–5%) and the reaction time (20–60 min.) in the lignin removal. The response surface methodology was used to optimize pretreatment parameters for maximum lignin removal. The optimal condition was 4.90% of NaOH and a solid weight percentage in liquid of 2.03% in 58.33 min, resulting in a maximum removal of 56.01% of lignin. Hydrodynamic cavitation can be easy to employ, an efficient and promissory pretreatment tool.