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AN OPTICAL METHOD TO STUDY THE KINETICS OF CLEANING MILK DEPOSITS BY SODIUM HYDROXIDE
Author(s) -
GALLOTLAVALLEE THIERRY,
LALANDE MARC,
CORRIEU GEORGES
Publication year - 1982
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1982.tb00267.x
Subject(s) - kinetics , sodium hydroxide , chemistry , suspension (topology) , materials science , analytical chemistry (journal) , chemical engineering , chromatography , mathematics , physics , quantum mechanics , homotopy , pure mathematics , engineering
An optical sensor was devised to observe cleaning kinetics of heat exchange surfaces fouled by milk and to study the influence of some parameters on them. The sensor works by sensing the attenuation of incident light by the suspension of deposits which are removed by the cleaning solution. The cleaning is carried out without recycling the cleaning solution. The on‐line collected numerical data are converted into concentration values by the use of an empirical correlation based on samples of freeze dried deposits diluted with soda solutions. The cleaning kinetics and the weight of removed fouled material are computed for each experiment by integrating the concentration versus time curve. Over 20 experiments, carried out on a plate milk pasteurizer have established the validity of the method. The kinetics are interpreted as initially zero order, but first order at the end of the process.