Role of extracellular polymeric substance in adsorption of quinolone antibiotics by microbial cells in excess sludge

2019 ◽  
Vol 370 ◽  
pp. 684-694 ◽  
Author(s):  
Da-Qi Cao ◽  
Wen-Yu Yang ◽  
Zhen Wang ◽  
Xiao-Di Hao
Keyword(s):  
Extracellular Polymeric Substance ◽  
Excess Sludge ◽  
Microbial Cells ◽  
Polymeric Substance ◽  
Quinolone Antibiotics

scholarly journals EXTRACELLULAR POLYMERIC SUBSTANCE OF BIOFILMS IN THE FORMATION OF ANTIMICROBIAL RESISTANCE OF MICROORGANISMS

2019 ◽  
pp. 6-12
Author(s):  
Olexandra Kovalenko ◽  
Yaroslav Kizim ◽  
Natalia Voroshylova
Keyword(s):  
Antibiotic Resistance ◽  
Antimicrobial Resistance ◽  
Building Material ◽  
Extracellular Polymeric Substance ◽  
Modern Literature ◽  
Main Form ◽  
Polymeric Substance ◽  
Resistant Strains ◽  
Permanent Formation

Abstract. The analysis of modern literature data on the mechanisms of the formation of antibiotic resistance and the role of extracellular polymeric substance in biofilms, which are the main form of microbial existence. The role of extracellular polymeric substance in limiting of the effect of unfavorable factors as well as the regularity and necessity of its formation for the community of microorganisms were discussed. The position on the permanent character of phenotype dispersion of microorganisms is postulated. This dispersion doesn’t provide the formation of more resistant strains only, but plays the prominent role in the permanent formation of various forms, that aren’t viable under given conditions but play the role of a depot of building material for extracellular polymeric substance. The mass death of low-resistant forms caused by the action of the antibiotic ensures saturation of the extracellular polymeric substance by dechromatized DNA, that increases the resistance of the microbial socium and contributes to the further formation of multiresistance.

Kinetic estimation of low excess sludge and extracellular polymeric substance accumulation in a vertical submerged membrane bioreactor (VSMBR)

2006 ◽  
Vol 1 (3) ◽  
Author(s):  
S.R. Chae ◽  
H.S. Chin
Keyword(s):  
Membrane Fouling ◽  
Extracellular Polymeric Substance ◽  
Membrane Bioreactor ◽  
Transmembrane Pressure ◽  
Yield Coefficient ◽  
Excess Sludge ◽  
Glucose Yield ◽  
Submerged Membrane Bioreactor ◽  
Polymeric Substance ◽  
Micro Organisms

The main objective of this study was to investigate reasons of mitigated membrane fouling based on a mathematical prediction of daily excess sludge (DES) and extracellular polymeric substance (EPS) accumulation in a laboratory-scale vertical submerged membrane bioreactor (VSMBR) fed with glucose. Yield coefficient, growth rate, and decay rate of autotrophic and heterotrophic micro-organisms were estimated by measuring oxygen uptake rate (OUR). From kinetic estimation, it was concluded that the DES from the VSMBR was only 4% of the total DES produced by the activated sludge process (ASP). This resulted from the lower yield biomass and the higher decay of heterotrophic biomass in the VSMBR. In part of the experiment, transmembrane pressure (TMP) was affected by a rapid increase in EPS concentration. Later, a second rapid increase of TMP was observed although EPS concentration was stable indicating that the second increase of TMP was caused by interfiber clogging other than EPS accumulation.

scholarly journals Role of Extracellular Polymeric Substance and Filamentous Appendages on Initial Bacterial Adhesion onto Solid Surface

2015 ◽  
Vol 52 (3) ◽  
pp. 132-138
Author(s):  
Akinori Yoshihara ◽  
Hisaya Narahara ◽  
Katsuhiro Sasano ◽  
Syunsuke Toyoda ◽  
Hayato Tokumoto ◽  
...  
Keyword(s):  
Solid Surface ◽  
Bacterial Adhesion ◽  
Extracellular Polymeric Substance ◽  
Polymeric Substance
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