hydrodynamic evaluation
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Water ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3141
Author(s):  
Juan F. Cisneros ◽  
Fabiola Cobos ◽  
Manuel Raul Pelaez-Samaniego ◽  
Usman Rehman ◽  
Ingmar Nopens ◽  
...  

UASB reactors are a promising option for environmentally friendly wastewater treatment due to their reduced carbon footprint and their capacity to treat a variety of wastewater strengths, among other recognized advantages over alternative wastewater treatment systems. The Influent Distribution System (IDS) is a critical structure for generating granules in a UASB reactor since it provides the required flow hydrodynamics for their formation. Thus, the objective of this study was to evaluate and compare the efficiency of five IDS configurations to generate ideal granulation conditions using Computational Fluid Dynamics (CFD) simulations. The IDS configurations were as follows: (C1) single radial inflow, (C2) upward axial inflow, (C3) downward distributed axial inflow, and two novel configurations in the form of (C4) double opposite radial inflow and (C5) downward tangential inflow. The hydrodynamic response of configuration C1 was validated in a physical model with dynamic Froude similitude. The granulation measurement was velocity-based in the reactor reaction zone using steady-state CFD simulations. The novel IDS configuration C4 was the one that resulted in the highest granulation volume, with up to 45.5% of the potential granulation volume of the UASB reactor, in contrast to the IDS C2 that obtained the lowest granulation with only 10.8%. Results confirm that the IDS directly impacts the hydrodynamics of the reactor and that model-based design can be used to ascertain IDS configurations that better promote granulation in UASB reactors.


Author(s):  
Chengliang Sun ◽  
Xiaojun Xu ◽  
Lei Zhang ◽  
Yuanjiang Tang

2021 ◽  
pp. 108005
Author(s):  
Marina Celant De Prá ◽  
Gabriela Bonassa ◽  
Marcelo Bortoli ◽  
Hugo M. Soares ◽  
Airton Kunz

Author(s):  
Constanza Fernandez Gorostidi ◽  
Jorge Daniel Bacchiega ◽  
Federico Romero ◽  
Claudio Antonio Fattor

Author(s):  
Philip LaMothe ◽  
Mali Christian ◽  
Peter Brodsky ◽  
Sarah E. Webster ◽  
Chanelle Cadot ◽  
...  

2019 ◽  
Vol 187 ◽  
pp. 106221 ◽  
Author(s):  
Reza Khazaee ◽  
Mohammad Amin Rahmansetayesh ◽  
Sajad Hajizadeh

2019 ◽  
Vol 290 ◽  
pp. 598-606 ◽  
Author(s):  
Fatima-Ezahra Annanouch ◽  
Gilles Bouchet ◽  
Pierre Perrier ◽  
Nicolas Morati ◽  
Christelle Reynard-Carette ◽  
...  

2018 ◽  
Vol 43 (2) ◽  
pp. 195-198 ◽  
Author(s):  
Ovandir Bazan ◽  
Márcia M. O. Simbara ◽  
Jayme P. Ortiz ◽  
Sonia M. Malmonge ◽  
Aron Andrade ◽  
...  

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