Pulsed forward flushes as a novel method for cleaning spent grains‐loaded filter cloth

Summary This paper presents a novel method to remove spent grains efficiently from filter cloths via pulsed forward flushes. In breweries, mash filters separate liquid wort from solid spent grains, a by‐product. These mash filters use woven fabrics made from synthetic materials as filter media. Howe...

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Bibliographic Details
Published inInternational journal of food science & technology Vol. 57; no. 7; pp. 4575 - 4585
Main Authors Werner, Roman Alejandro, Schappals, Lukas, Geier, Dominik Ulrich, Becker, Thomas
Format Journal Article
LanguageEnglish
Published Oxford Wiley Subscription Services, Inc 01.07.2022
Subjects
Adhesive strength
Breweries
Cleaning
Cleaning process
cleaning sensory
filter cloth cleaning
Filter media
Filters
forward flush
Hygiene
mash filter cleaning
pulsed cleaning
spent grains removal
wash jet
Wort
Worts
Woven fabrics
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Summary:Summary This paper presents a novel method to remove spent grains efficiently from filter cloths via pulsed forward flushes. In breweries, mash filters separate liquid wort from solid spent grains, a by‐product. These mash filters use woven fabrics made from synthetic materials as filter media. However, rough filter surfaces often hinder the cleaning process. Concerning modern hygienic design principles, filter cloths are only designed for efficient filtration performances, in which cleanability is not considered. Hence, in combination with strongly adhesive spent grains, brewers often reject mash filters. The paper illustrates an experimental parameter variation and a comparison of pulsed with continuous cleaning in respect to their cleaning performance. The results showed that the proposed method is suitable, reaching up to 30% higher cleaning degrees than conventional methods. Furthermore, the technique required up to 50% fewer cleaning fluids and shorter cleaning times, indicating economic and ecological advantages. Pulsed forward flushes were identified as a promising cleaning concept for mash filters of a brewery. From an economical and ecological point of view, cleaning becomes more efficient when using pulsed jets. This paper combines a parameter variation with a novel technique to detect spent grains on a contaminated filter cloth surface.
ISSN:0950-5423
1365-2621
DOI:10.1111/ijfs.15795