Control of microbes on barley grains using peroxyacetic acid and electrolysed water as antimicrobial agents
| Autor: | Roger Stanley, Mandeep Kaur, Laura Rood, Anthony Koutoulis, DE Evans, John P. Bowman |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0301 basic medicine
Electrolysed water 030106 microbiology chemistry.chemical_element Germination Bacterial growth Microbiology Electrolysis 03 medical and health sciences 0404 agricultural biotechnology Anti-Infective Agents Chlorine Peracetic Acid Food science Bacteria biology Chemistry business.industry Pseudomonas Fungi Beer Water food and beverages Hordeum 04 agricultural and veterinary sciences Antimicrobial biology.organism_classification 040401 food science Fermentation Food Microbiology Brewing Edible Grain business Food Science |
| Zdroj: | Food Microbiology. 76:103-109 |
| ISSN: | 0740-0020 |
| Popis: | The extent and type of microbial growth on barley grain is a key determinant of malt quality for beer production, as problematic microbial products can persist into the brewing process and impact beer quality. Microbial composition on malting barley grain are influenced by field growth, storage and malting conditions. The present study investigated the efficacy of electrolysed water (EW) with free chlorine concentrations of 5, 50, 100 and 500 ppm, as well as peroxyacetic acid (PAA) at 100 and 500 ppm, as pre-steep treatments to control microbes on grains during the malting process. The research determined the reduction in the load of Pseudomonas spp., heterotrophic bacteria, yeasts and filamentous fungi on weathered and on non-weathered grains. Pseudomonas spp., heterotrophic bacteria and yeasts were significantly reduced up to 4 logs when treated with 500 ppm PAA. PAA reduced filamentous fungi but 500 ppm free chlorine EW showed greater reductions. None of the treatments had detrimental effect on grain germination. The variation in antimicrobial efficacy among treatments can be attributed to variations in microbial susceptibility as well as differences in anti-microbial mechanisms specific to each antimicrobial agent. |
| Databáze: | OpenAIRE |
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