Simulation and optimization of hydraulic conditions via separation mesh modification in a pilot hybrid growth membrane bioreactor using computational fluid dynamics

2020 ◽  
Vol 201 ◽  
pp. 133-149
Author(s):  
Ahmed Bakr ◽  
Bo-Wen Wang ◽  
He-Ping Liu ◽  
Xue-Song Yi ◽  
Fei Yang
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Membrane Bioreactor ◽  
Simulation And Optimization ◽  
Hydraulic Conditions ◽  
Hybrid Growth

scholarly journals Simulation and optimization of airlift external circulation membrane bioreactor using computational fluid dynamics

2014 ◽  
Vol 69 (9) ◽  
pp. 1846-1852 ◽  
Author(s):  
Zhang Qing ◽  
Xu Rongle ◽  
Zheng Xiang ◽  
Fan Yaobo
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Membrane Surface ◽  
Aeration Tank ◽  
Low Velocity ◽  
Simulation And Optimization ◽  
External Circulation ◽  
Membrane Modules

The airlift external circulation membrane bioreactor (AEC-MBR) is a new MBR consisting of a separated aeration tank and membrane tank with circulating pipes fixed between the two tanks. The circulating pipe is called a H circulating pipe (HCP) because of its shape. With the complex configuration, it was difficult but necessary to master the AEC-MBR's hydraulic characteristics. In this paper, simulation and optimization of the AEC-MBR was performed using computational fluid dynamics. The distance from diffusers to membrane modules, i.e. the height of gas–liquid mixing zone (hm), and its effect on velocity distribution at membrane surfaces were studied. Additionally, the role of HCP and the effect of HCP's diameter on circulation were simulated and analyzed. The results showed that non-uniformity of cross-flow velocity existed in the flat-plate membrane modules, and the problem could be alleviated by increasing hm to an optimum range (hm/B ≥ 0.55; B is total static depth). Also, the low velocity in the boundary layer on the membrane surface was another reason for membrane fouling. The results also suggested that HCP was necessary and it had an optimum diameter to make circulation effective in the AEC-MBR.

scholarly journals Computational fluid dynamics simulation as a tool for optimizing the hydrodynamic performance of membrane bioreactors

RSC Advances ◽  
2019 ◽  
Vol 9 (55) ◽  
pp. 32034-32046 ◽  
Author(s):  
Yan Jin ◽  
Cheng-Lin Liu ◽  
Xing-Fu Song ◽  
Jian-Guo Yu
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Membrane Bioreactors ◽  
Dynamics Simulation ◽  
Hydrodynamic Performance ◽  
Shear Stresses ◽  
Computational Fluid Dynamics Simulation ◽  
Hydrodynamic Properties

The hydrodynamic properties and shear stresses experienced by a membrane bioreactor (MBR) are directly related to its rate of membrane fouling.

Optimization of membrane unit location in a full-scale membrane bioreactor using computational fluid dynamics

2018 ◽  
Vol 249 ◽  
pp. 402-409 ◽  
Author(s):  
Qing Wu ◽  
Xiaoxu Yan ◽  
Kang Xiao ◽  
Jing Guan ◽  
Tianyu Li ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Membrane Bioreactor ◽  
Full Scale ◽  
Membrane Unit

Hydrodynamic optimization of membrane bioreactor by horizontal geometry modification using computational fluid dynamics

2016 ◽  
Vol 200 ◽  
pp. 328-334 ◽  
Author(s):  
Xiaoxu Yan ◽  
Qing Wu ◽  
Jianyu Sun ◽  
Peng Liang ◽  
Xiaoyuan Zhang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Membrane Bioreactor ◽  
Hydrodynamic Optimization

Investigating the effect of sparger configuration on the hydrodynamics of a full-scale membrane bioreactor using computational fluid dynamics

RSC Advances ◽  
2015 ◽  
Vol 5 (127) ◽  
pp. 105218-105226 ◽  
Author(s):  
Ershad Amini ◽  
Mohammad Reza Mehrnia ◽  
Seyyed Mohammad Mousavi ◽  
Hamed Azami ◽  
Navid Mostoufi
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Membrane Bioreactor ◽  
Cfd Simulation ◽  
Full Scale ◽  
Hydrodynamic Parameters ◽  
Three Phase ◽  
Computational Fluid Dynamics Cfd

A three-phase computational fluid dynamics (CFD) simulation was carried out in a full-scale membrane bioreactor to investigate the effect of sparger configuration on various hydrodynamic parameters.

The Application of Computational Fluid Dynamics (CFD) in Wastewater Biological Treatment Field

2014 ◽  
Vol 507 ◽  
pp. 711-715
Author(s):  
Si Mai Peng ◽  
Yi Di Chen ◽  
Wan Qian Guo ◽  
Shan Shan Yang ◽  
Qing Lian Wu ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Activated Sludge ◽  
Biological Treatment ◽  
Membrane Bioreactor ◽  
Flow State ◽  
Activated Sludge Reactor ◽  
Computational Fluid Dynamics Cfd ◽  
Ultimate Purpose ◽  
Wastewater Biological Treatment

Computational fluid dynamics (CFD), which is a widely used technique, has been applied to the wastewater biological treatment field recently. It can clearly reveal the inner flow state that is the hydraulic condition of a biological reactor. In engineering, it is able to guide the optimization, and even the design. This paper reviews the application of CFD in the main biological reactors, including: stabilization pond, membrane bioreactor and activated sludge reactor. In addition, the existing difficulties are thoroughly analyzed from three aspects: the current researches, the limitation of the studies and the reasons of the limitation. The ultimate purpose of this review is to point out the developing direction of the research and to inspire researchers to expand the use of CFD in this field.

Hydraulic optimization of membrane bioreactor via baffle modification using computational fluid dynamics

2015 ◽  
Vol 175 ◽  
pp. 633-637 ◽  
Author(s):  
Xiaoxu Yan ◽  
Kang Xiao ◽  
Shuai Liang ◽  
Ting Lei ◽  
Peng Liang ◽  
...  
Keyword(s):  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Membrane Bioreactor
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