Theoretical modeling and experimental validation of hydrodynamic cavitation reactor with a Venturi tube for sugarcane bagasse pretreatment

Paradigm Shift toward Developing a Zero Liquid Discharge Strategy for Dye-Contaminated Water Streams: A Green and Sustainable Approach Using Hydrodynamic Cavitation and Vacuum Membrane Distillation

“…From an engineering point of view, , the design and geometry of the cavitating device depend on (i) the effect of injection slot diameter on flow velocity and flow pressure, (ii) effect of the free area offered for the flow, and (iii) effect of thickness of orifice plate. There are several reports on the numerical simulations and validation of the same with experimental results. , In this work, the authors have initially optimized the geometry of the cavitating device by varying the flow rate and pressure intensifying the cavitation bubble generation. To understand the effect of operating parameters and % degradation of MB, experiments were carried out by varying the orifice opening from 1.4 to 5 mm.…”

Hydrodynamic cavitation for lignocellulosic biomass pretreatment: a review of recent developments and future perspectives

“…Net energy output 61 kWh/d Zieliński et al 2019 Conifer and Eucalyptus pulp ARHCR - 6000 rpm, 15.2 L/min, 98 kPa, 9 min, T = 34 °C, 3% solid loading Paper with tensile index 50.5 kN m/kg, burst index at 3 kPa.m 2 /g. Energy consumption 58.4 kWh/m 3 Kosel et al 2019 Sugarcane bagasse (< 0.250 mm) Venturi tube (1.5 mm of throat diameter, length 40 mm) Biomass slurry (Mixed with catalyst and circulated in a closed loop) 4.9% NaOH, 2.03% solid loading, 58.33 min, operating temperature 65 °C, inlet pressure 300 kPa Lignin removal 56.14%, 97.2% enzymatic hydrolysis yield at the optimal condition obtained by RSM Bimestre et al 2020 Corncob (≤ 212 μm) Orifice plate Biomass slurry (Mixed with acetate buffer and circulated in a closed loop) Laccase enzyme 6.5 U/g of biomass, 5% solid loading, 60 min, operating temperature 70 °C Lignin removal 64.1%, Hemicellulose removal 6.57%, saccharification efficiency of 55% with multifunctional cellulases at 50 °C and pH. 5.0 Ganesan et al 2020 Sugarcane bagasse (10 mesh) Vortex based cavitation device Biomass slurry (Mixed with catalyst and circulated in a closed loop) Solid loading 1% w/v, 1.2m 3 /h, 100 passes at 30 °C, 0.75 M NaOH, 60 min Lignin removal 77.4%, 75.5% ± 1.9 g/L glucose was released with 70.3% Cellulose hydrolysis, hemicellulose conversion 69.4% Nalawade et al 2020 Wheat straw (< 0.05 mm) ARHCR Biomass slurry (Mixed with catalyst and circulated in a closed loop) 3000 rpm, 50 °C, 0.4% NaOH, solid–liquid ratio 1:50, 30 min Lignin removal 24.05% Lauberte et al 2021 Miscanthus × giganteus stalks (5 mm) ARHCR Biomass slurry (Mixed with catalyst and circulated in a closed loop) 0.3 M KOH, 2200 rpm, 20 min, 7% solid loading, Room Temperature Lignin removal 41.54%.…”

“…In this path, hydrodynamic cavitation arises as a promising technological route to lignocellulosic biomass pretreatment (Wu et al 2019 ). Hydrodynamic cavitation phenomena occur through mechanical constrictions as Venturi pipes, orifice plates, and throttling valve, which cause a sufficient pressure change to form vapor microcavities that collapse releasing high energy amount, inducing physical and chemical transformations, which favor the lignin–carbohydrate matrix disruption (Bimestre et al 2020 ). Although the use of hydrodynamic cavitation as a pretreatment of lignocellulosic biomass has been studied for some time, the number of published articles is relatively small (less than 35) compared to other emerging pretreatment methods, indicating that HC did not attract much attention of researchers (Sun et al 2021a ).…”

Study on the Influence and Optimization of the Venturi Effect on the Natural Ventilation of Buildings in the Xichang Area

“…Shi et al [14] conducted experimental and numerical studies on the cavitation phenomena in venturi tubes with different geometric shapes. Bimestre et al [15], Zhu et al [16], and Long et al [17] explored the cavitation characteristics of venturi tubes. The application of the venturi effect goes far beyond this.…”