Upgrading of submerged membrane bioreactor operation with regard to soluble microbial products and mathematical modeling for optimisation of critical flux

2012 ◽  
Vol 39 ◽  
pp. 199
Author(s):  
Gagik Badalians Gholikandi ◽  
Mahdi Khosravi
Keyword(s):  
Mathematical Modeling ◽  
Membrane Bioreactor ◽  
Soluble Microbial Products ◽  
Critical Flux ◽  
Submerged Membrane Bioreactor ◽  
Bioreactor Operation ◽  
Microbial Products

Modification of ASM No.1 for a submerged membrane bioreactor system: including the effects of soluble microbial products on membrane fouling

2003 ◽  
Vol 47 (12) ◽  
pp. 177-181 ◽  
Author(s):  
J. Cho ◽  
K.-H. Ahn ◽  
Y. Seo ◽  
Y. Lee
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Membrane Resistance ◽  
Soluble Microbial Products ◽  
Submerged Membrane Bioreactor ◽  
Operation Conditions ◽  
In Series ◽  
Bioreactor System ◽  
Microbial Products ◽  
Major Factors

In this study, a mathematical model for the submerged membrane bioreactor (SMBR) was developed by combining the activated sludge model (ASM) with a membrane resistance-in-series model. Some modifications were introduced to make ASM to be suitable for describing the characteristics of SMBR. A set of the 1st-order differential equations was established for 13 dependent variables relevant to particles and soluble matters. Performing model simulations for various conditions, the time when a membrane would be fouled could be predicted as well as the effluent quality. From simulation results, F/M ratio and SRT can be considered as major factors of the soluble microbial products (SMP) concentration in a reactor and it is clear that SMP can play an important role in membrane fouling and water quality simultaneously. The model would be very helpful in optimizing operation conditions as well as in designing an optimal SMBR system.

Critical flux determination by the flux-step method in a submerged membrane bioreactor

2003 ◽  
Vol 227 (1-2) ◽  
pp. 81-93 ◽  
Author(s):  
Pierre Le Clech ◽  
Bruce Jefferson ◽  
In Soung Chang ◽  
Simon J. Judd
Keyword(s):  
Membrane Bioreactor ◽  
Step Method ◽  
Critical Flux ◽  
Submerged Membrane Bioreactor ◽  
Flux Determination

scholarly journals Biomass Characteristics and Their Effect on Membrane Bioreactor Fouling

Molecules ◽  
2019 ◽  
Vol 24 (16) ◽  
pp. 2867 ◽  
Author(s):  
Petros K. Gkotsis ◽  
Anastasios I. Zouboulis
Keyword(s):  
Membrane Fouling ◽  
Membrane Bioreactor ◽  
Suspended Solids ◽  
Extracellular Polymeric Substances ◽  
Membrane Surface ◽  
Membrane Resistance ◽  
Soluble Microbial Products ◽  
Gelling Properties ◽  
Microbial Products ◽  
Soluble Part

Biomass characteristics are regarded as particularly influential for fouling in Membrane Bio-Reactors (MBRs). They primarily include the Mixed Liquor Suspended Solids (MLSS), the colloids and the Extracellular Polymeric Substances (EPS). Among them, the soluble part of EPS, which is also known as Soluble Microbial Products (SMP), is the most significant foulant, i.e., it is principally responsible for membrane fouling and affects all fundamental fouling indices, such as the Trans-Membrane Pressure (TMP) and the membrane resistance and permeability. Recent research in the field of MBRs, tends to consider the carbohydrate fraction of SMP (SMPc) the most important characteristic for fouling, mainly due to the hydrophilic and gelling properties, which are exhibited by polysaccharides and allow them to be easily attached on the membrane surface. Other wastewater and biomass characteristics, which affect indirectly membrane fouling, include temperature, viscosity, dissolved oxygen (DO), foaming, hydrophobicity and surface charge. The main methods employed for the characterization and assessment of biomass quality, in terms of filterability and fouling potential, can be divided into direct (such as FDT, SFI, TTF100, MFI, DFCM) or indirect (such as CST, TOC, PSA, RH) methods, and they are shortly presented in this review.

Characterization of soluble microbial products (SMPs) in a membrane bioreactor (MBR) treating synthetic wastewater containing pharmaceutical compounds

2016 ◽  
Vol 102 ◽  
pp. 594-606 ◽  
Author(s):  
Dongqing Zhang ◽  
Antoine Prandota Trzcinski ◽  
Chinagarn Kunacheva ◽  
David C. Stuckey ◽  
Yu Liu ◽  
...  
Keyword(s):  
Membrane Bioreactor ◽  
Pharmaceutical Compounds ◽  
Synthetic Wastewater ◽  
Soluble Microbial Products ◽  
Microbial Products
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