Choosing When to Clean and How to Clean Biofilms in Heat Exchangers

Pogiatzis, Thomas; Vassiliadis, Vassilis S.; Mergulhão, Filipe; Wilson, D.I.

doi:10.1080/01457632.2015.954940

Cited by 7 publications

(2 citation statements)

References 34 publications

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“…Heat-treated foods may be contaminated by many types of bacteria mainly spore-forming bacteria because of its ability to live with high temperatures and biofilm forming on a living or abiotic surfaces [9]. Formation of microbial biofilms on the internal surface of thermal equipment such as sterilizers and pasteurizers may lead to corrosion of the material and to reduced efficiency of heat exchangers, these causing huge losses for the food industry [10].…”

Section: Interaction Of Biofilm In Food Industrymentioning

confidence: 99%

Biofilms Formation by Pathogenic Bacteria. Review

Felifel,

Reda,

Hassanien

2024

Bulletin of Faculty of Science, Zagazig University

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Biofilm is a complex structure specific for microbial communities formed on biotic and nonliving surfaces such as prosthetic or artificial teeth ; increase their resistance to stressed conditions and protect themselves. Biofilm surrounding bacterial cell colony had increased their resistance to antibiotics. Several microorganisms able to form biofilms on adherent surface such as Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli and Bacillus cereus. Bacillus cereus is a Gram positive, rod-shaped bacteria, found in soil but it is also isolated from plant roots and food products. Some B. cereus strains are foodborne pathogens responsible for two types of gastrointestinal diseases, diarrhea and emesis, caused by distinct toxins. Disruption of biofilm forming may be better than removing them after formation. Several strategies were used to overcome biofilm such as nanoparticles, antibiotics and chemical treatment. In this review, microbial biofilms in several fields as food industry and medicine are highlighted and illustrate the methods which are used to break down biofilm.

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Section: Interaction Of Biofilm In Food Industrymentioning

confidence: 99%

Biofilms Formation by Pathogenic Bacteria. Review

Felifel,

Reda,

Hassanien

2024

Bulletin of Faculty of Science, Zagazig University

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“…Biofilm growth on surfaces in the food processing environment can also result in economic losses [1,4,19] since they often require the suspension of manufacturing steps and additional labor for effective removal of biofilms by stringent cleaning and disinfection procedures [19,21]. Furthermore, the formation of microbial biofilms on the internal surface of thermal equipment such as pasteurizers and sterilizers may lead to corrosion of the material and to reduced efficiency of heat exchangers, thus causing huge losses for the food industry especially in smaller scale processing units [45,46].…”

Section: Surface Cleaning and Disinfection Strategies For Prevention Of Microbial Biofilmsmentioning

confidence: 99%

Biofilms from Pathogenic Bacteria in Food Processing Environments: Formation and Preventive Disinfection Procedures

Lee

Portinari

Corassin

et al. 2021

Food Science and Engineering

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The ability of some pathogenic bacterial species to form biofilms on surfaces of equipment and utensils is of great concern to the food industry since they represent a continuous source of contamination in food processing environments. In this review, the factors involved in the formation of microbial biofilms are highlighted, along with a discussion on the preventive disinfection procedures recommended to avoid the attachment of microbial cells on surfaces of equipment and utensils in food processing areas. Relevant articles published in the last 10 years (2012-present) were selected in PubMed, Science Direct, and Google Scholar. Methods for assessing the adhesion and biofilm formation ability of strains isolated from surfaces in the food industry environment are also presented.

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Quantifying the ‘implementation gap’ for antifouling coatings

Magens

Ishiyama²,

Wilson

2016

Applied Thermal Engineering

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Fouling is a chronic problem in many heat transfer systems and leads to regular cleaning of heat exchangers. Antifouling coatings are one mitigation option: the financial attractiveness of installing a coated exchanger depends on trade-offs between capital and operating costs over the lifetime of the unit. Such considerations effectively set bounds on the price of coatings, bounded by manufacturing costs and the maximum saving that can be achieved from fouling mitigation, in a 'value pricing' calculation. The 'value pricing' concept is considered here, for the first time, for heat exchangers subject to asymptotic fouling. An explicit solution to the cleaning scheduling optimisation problem is presented for the case of equal heat capacity flow rates in a co-or counter-current single phase exchanger. A case study is used to illustrate the concepts and key learnings. A sensitivity analysis identifies scenarios where the use of antifouling coatings may be attractive, and also where there is no financial benefit in cleaning a fouled exchanger.

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Choosing When to Clean and How to Clean Biofilms in Heat Exchangers

Cited by 7 publications

References 34 publications

Biofilms Formation by Pathogenic Bacteria. Review

Biofilms Formation by Pathogenic Bacteria. Review

Biofilms from Pathogenic Bacteria in Food Processing Environments: Formation and Preventive Disinfection Procedures

Quantifying the ‘implementation gap’ for antifouling coatings

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