Optimization of MBR hydrodynamics for cake layer fouling control through CFD simulation and RSM design.

There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

Abstract

Membrane fouling is an important issue for membrane bioreactor (MBR) operation. This paper aims at the investigation and the controlling of reversible membrane fouling due to cake layer formation and foulants deposition by optimizing MBR hydrodynamics through the combination of computational fluid dynamics (CFD) and design of experiment (DOE). The model was validated by comparing simulations with measurements of liquid velocity and dissolved oxygen (DO) concentration in a lab-scale submerged MBR. The results demonstrated that the sludge concentration is the most influencing for responses including shear stress, particle deposition propensity (PDP), sludge viscosity and strain rate. A medium sludge concentration of 8820mgL-1 is optimal for the reduction of reversible fouling in this submerged MBR. The bubble diameter is more decisive than air flowrate for membrane shear stress due to its role in sludge viscosity. The optimal bubble diameter was at around 4.8mm for both of shear stress and PDP.

Related collections

Author and article information

Journal

Journal ID (iso-abbrev): Bioresour Technol

Title: Bioresource technology

Publisher: Elsevier BV

ISSN (Electronic): 1873-2976

ISSN (Print): 0960-8524

Publication date (Electronic): Mar 2017

Volume: 227

Affiliations

[1 ] State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085 Beijing, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China.

[2 ] School of Environment and Nature Resources, Renmin University of China, Beijing 100872, China.

[3 ] School of Energy and Power Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China.

[4 ] State Key Joint Laboratory of Environmental Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 100085 Beijing, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China. Electronic address: ybfan@rcees.ac.cn.

Article

Publisher Item ID: S0960-8524(16)31686-8

DOI: 10.1016/j.biortech.2016.12.027

PubMed ID: 28013126

SO-VID: ae98b06c-4739-4ffc-8bc3-e7f0e37c9924

History

Keywords: MBR,Hydrodynamics,Fouling,Cake layer,CFD

Data availability:

Keywords: MBR, Hydrodynamics, Fouling, Cake layer, CFD

Comments

Comment on this article

scite_

Cited by 11

See all cited by