Biofilms and Microbial Fouling

Characklis, William G.; Cooksey, Keith E.

doi:10.1016/s0065-2164(08)70355-1

Cited by 347 publications

(209 citation statements)

References 90 publications

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“…Microbiologically influenced corrosion (MIC) usually occurs with various types of corrosion and with scaling (Little et al 1996;Valdez et al 2009). Studies focusing on biofilms in several industrial water systems reported extensive biofouling and associated mineral precipitation leading to reduced efficiency of heat exchangers and reduced flow rates in the piping (Characklis 1990;Flemming 2002;Demadis 2003;Coetser and Cloete 2005).…”

Section: Introductionmentioning

confidence: 99%

Thermal effects on microbial composition and microbiologically induced corrosion and mineral precipitation affecting operation of a geothermal plant in a deep saline aquifer

et al. 2013

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The microbial diversity of a deep saline aquifer used for geothermal heat storage in the North German Basin was investigated. Genetic fingerprinting analyses revealed distinct microbial communities in fluids produced from the cold and warm side of the aquifer. Direct cell counting and quantification of 16S rRNA genes and dissimilatory sulfite reductase (dsrA) genes by real-time PCR proved different population sizes in fluids, showing higher abundance of bacteria and sulfate reducing bacteria (SRB) in cold fluids compared with warm fluids. The operation-dependent temperature increase at the warm well probably enhanced organic matter availability, favoring the growth of fermentative bacteria and SRB in the topside facility after the reduction of fluid temperature. In the cold well, SRB predominated and probably accounted for corrosion damage to the submersible well pump, and iron sulfide precipitates in the near wellbore area and topside facility filters. This corresponded to lower sulfate content in fluids produced from the cold well as well as higher content of hydrogen gas that was probably released from corrosion, and maybe favored growth of hydrogenotrophic SRB. This study reflects the high influence of microbial populations for geothermal plant operation, because microbiologically induced precipitative and corrosive processes adversely affect plant reliability.2

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Section: Introductionmentioning

confidence: 99%

Thermal effects on microbial composition and microbiologically induced corrosion and mineral precipitation affecting operation of a geothermal plant in a deep saline aquifer

et al. 2013

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“…The flow velocity determines the hydrodynamic shear and the mass transfer characteristics of a system. It has been established that (steady state) biofilm thickness increases with nutrient concentration when shear is held constant (Characklis 1990) but decreases with shear when the substrate loading rate is constant . The relationship order between thickness and shear is proportional to substrate loading rate and approaches zero order for low substrate loading .…”

Section: Introductionmentioning

confidence: 99%

Influence of hydrodynamics and nutrients on biofilm structure

Stoodley¹,

Dodds

Boyle

et al. 1998

Journal of Applied Microbiology

326

252

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“…Although several characteristics are important in the attachment process, evidence suggests that microbial colonization appears to increase with surface roughness (Characklis, 1990) as a result of lower shear forces and greater surface area on rougher surfaces. Studies have confirmed that microorganisms attach more rapidly to hydrophobic, nonpolar surfaces such as Teflon and other plastics than to hydrophilic materials such as glass or metals (Bendinger et al, 1993).…”

Section: Nature Of Surfacementioning

confidence: 99%

“…For example, an increase in the number of attached bacterial cells was observed as a result of an increase in nutrient concentration in medium (Cowan et al, 1991) and an increase in the concentration of several cations (Fletcher, 1988). Additionally, hydrodynamic properties of the aqueous medium such as velocity characteristics of the liquid influence the rate and extent of attachment (Characklis, 1990).…”

Section: Properties Of Mediummentioning

confidence: 99%

Review on biofilm formation and its control options

2017

Int. J. Adv. Res. Biol. Sci

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The generalized idea that bacteria have a unicellular way of life is not entirely accurate, given that pure planktonic growth is uncommon. Biofilms are defined as an organized group of microorganisms living within a self-produced matrix of polymeric substances which gets attached to several surfaces. This review was done with the objective to give an overview on the mechanism of biofilm formation and highlight its veterinary and public health implications and control options. The formation of a biofilm occurs in five stages, stage of cell attachment, stage securely affixing of cells, stage of micro-colonies formation and beginning to mature, Stage of more maturation, and stage of dispersal of cells from the biofilm. Factors controlling cell attachment include nature of surface, properties of medium and properties of the microbial cell surface. Formation of a biofilm is dependent on the interaction between the environmental stimuli and the reciprocation of the corresponding signalling events by the microorganisms. Biofilms are composed primarily of microbial cells and EPS. The importance of biofilm in disease processes in humans and animals is now widely recognized. In animal species, the risk of infection is probably greater than the risk in humans. In human infections associated with biofilm formation were medical device-related infections including Pacemakers, electrical dialysers, joint prosthetics, intravenous catheters, urinary catheter. As food is identified to be a very efficient vehicle for bringing a large number of people into contact with a potential hazard, food processing equipments can be persistent source of spoilage and pathogenic bacteria if microorganisms form biofilm on them. Ideally, preventing biofilm formation would be a more logical option than treating it. The main strategy to prevent biofilm formation is to clean and disinfect regularly before bacteria attach firmly to surfaces. This process can remove 90% or more of microorganisms associated with the surface. Biofilm detectors, acid shock treatment and recently using bacteriophages have been tried. The prevention and control of biofilm formation is somewhat difficult but prevention is the ideal approach even if there are control methods too. The development of better control and prevention methods with better effect need to be given special emphasis.

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Biofilms and Microbial Fouling

Cited by 347 publications

References 90 publications

Thermal effects on microbial composition and microbiologically induced corrosion and mineral precipitation affecting operation of a geothermal plant in a deep saline aquifer

Thermal effects on microbial composition and microbiologically induced corrosion and mineral precipitation affecting operation of a geothermal plant in a deep saline aquifer

Influence of hydrodynamics and nutrients on biofilm structure

Review on biofilm formation and its control options

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