Microscopic analysis and microstructural characterization of the organic and inorganic components of dairy fouling during the cleaning process
Visualitza/Obre
Autor/a
Guerrero-Navarro, Alfons Eduard
Ríos-Castillo, Abel Guillermo
Ripolles-Avila, Carolina
Rodríguez-Jerez, José Juan
Data de publicació
2020-01-13ISSN
0022-0302
Resum
This study evaluated the organic residues of milk fouling using fluorescence and confocal laser scanning microscopy. The inorganic content was analyzed with energy-dispersive X-ray spectroscopy, complemented with inductively coupled plasma optical emission spectrometry. These techniques were applied to evaluate milk fouling cleanliness using an alkaline product and an enzymatic formulation based on protease and amylase. The results showed that the efficiency of enzymatic cleaning was 87.1% when it was evaluated at 55°C for 30 min, and with a medium of pH 8.5. No difference was found from the efficacy in eliminating dairy fouling observed for the chemical cleaning (86.9%). The fluorescence microscopy proved useful for determining the organic solid components in the outer layer of the dairy fouling. The fouling spatial disposition in 3 dimensions, obtained by confocal laser scanning microscopy, showed that it was formed of 51.3% sugars, 9.3% fats, and 39.4% proteins, with the enzymatic cleaning of these compounds being homogeneous, compared with chemical cleaning. The protein and lipid contents were in the surface layer, whereas sugars were located in the innermost part that contributes to the Maillard reaction during fouling formation. After enzymatic cleaning, the reduction in the concentration of Ca and P was 71.61 and 74.67%, respectively, compared with fouling intact. Thus, enzymatic cleaning, without the accumulation of Na from chemical cleaning, leaves 1.5 times less mineral than chemical cleaning. Knowing the content and structure of fouling in the industry helps to formulate better products to achieve proper levels of cleanliness. Additionally, studying the cleaning residues helps to avoid problems of cross-contamination between batches or subsequent microbial growths (biofilms) on surfaces with residues
Tipus de document
Article
Versió del document
Versió acceptada
Llengua
English
Matèries (CDU)
663/664 - Aliments i nutrició. Enologia. Olis. Greixos
Pàgines
22
Publicat per
American Dairy Science Association
Publicat a
Journal of Dairy Science
Citació
Guerrero-Navarro, Alfons Eduard, Abel Guillermo Ríos-Castillo, Carolina Ripolles-Avila, Xavier Felipe, and José Juan Rodríguez-Jerez. 2020. "Microscopic Analysis And Microstructural Characterization Of The Organic And Inorganic Components Of Dairy Fouling During The Cleaning Process". Journal Of Dairy Science 103 (3): 2117-2127. American Dairy Science Association. doi:10.3168/jds.2019-16957.
Programa
Qualitat i Tecnologia Alimentària
Aquest element apareix en la col·lecció o col·leccions següent(s)
- ARTICLES CIENTÍFICS [2850]
Excepte que s'indiqui una altra cosa, la llicència de l'ítem es descriu com http://creativecommons.org/licenses/by-nc-nd/4.0/