Chemistry and Energy Department, Guaratinguetá Engineering Faculty, São Paulo State University UNESP, CEP: 12516-410, Guaratinguetá, SP, Brazil; Mechanical Engineering Department, Lorena Campus, São Paulo Salesian University Center UNISAL, CEP: 12600-100, Lorena, SP, Brazil.
Mechanical Engineering Department, Lorena Campus, São Paulo Salesian University Center UNISAL, CEP: 12600-100, Lorena, SP, Brazil.
Bioresour Technol. 2020 Sep;311:123540. doi: 10.1016/j.biortech.2020.123540. Epub 2020 May 16.
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.
为了评估压力比、喉道直径和长度的影响，采用计算流体动力学方法对带有文丘里管的水力空化反应器进行了建模。根据计算建模结果，建造了配备文丘里管的水力空化反应器。为了评估 NaOH 浓度（1-5%）、固液比（1-5%）和反应时间（20-60 min）对木质素去除的影响，进行了水力空化辅助碱性预处理。采用响应面法对预处理参数进行优化，以获得最大木质素去除率。最佳条件为 4.90%的 NaOH 和 2.03%的固液比，在 58.33 min 内，木质素的最大去除率为 56.01%。水力空化可以作为一种易于使用、高效且有前途的预处理工具。
