Identification of bacterial contaminants from calcium carbonate filler production lines and an evaluation of biocide based decontamination procedures

The aim of this study was to analyze the bacterial community in the production line of a calcium carbonate filler production company and to investigate possible causes for bacterial presence. Throughout 2012, 24 carbonate slurry and six groundwater samples were analyzed. Pseudomonas and Microbacteri...

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Bibliographic Details
Published in:Biofouling (Chur, Switzerland) Switzerland), 2017-04, Vol.33 (4), p.327-335
Main Authors: Odić, Duško, Prah, Jana, Avguštin, Gorazd
Format: Article
Language:English
Subjects:
Adsorption
antimicrobials
Bacteria
bacterial contamination
Biocides
Brevundimonas
Calcium
Calcium carbonate
Calcium Carbonate - chemistry
Calcium carbonates
carbonate products
Carbonates
Consortia
Construction Materials - analysis
Construction Materials - microbiology
Contaminants
Contamination
Decontamination
Decontamination - methods
Disinfectants - pharmacology
Effectiveness
Evaluation
Formulations
Groundwater
Groundwater - analysis
Groundwater - microbiology
Industrial microbiology
Microbacterium
Microbial Sensitivity Tests
Microbiological strains
Particulates
Procedures
Production lines
Pseudomonas
Pseudomonas - drug effects
Pseudomonas - isolation & purification
Slurries
Sporogenesis
Water samples
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Summary:The aim of this study was to analyze the bacterial community in the production line of a calcium carbonate filler production company and to investigate possible causes for bacterial presence. Throughout 2012, 24 carbonate slurry and six groundwater samples were analyzed. Pseudomonas and Microbacterium were the most frequent contaminants in the slurry, whereas Pseudomonas and Brevundimonas dominated the groundwater samples. Of the 43 different bacterial strains isolated, only five were found both in the slurry and the groundwater, indicating that the latter was not a major source of contamination. The efficacy of 54 commercial biocidal formulations was tested against an artificial bacterial consortium composed of selected slurry isolates. A formulation containing 7.5-15% (v v -1 ) bronopol and 1.0-2.5% (v v -1 ) [chloroisothiazolinone (CIT) + methylisothiazolinone (MIT)] exhibited the highest efficacy. Of the possible causes for bacterial presence, sporogenesis and biocide adsorption to carbonate particles were found to be less probable compared to bacterial adsorption to particles, and the acquisition of resistance to biocides.
ISSN:0892-7014
1029-2454
DOI:10.1080/08927014.2017.1310848