In-situ cleaning process of chamber filter presses with sensor-controlled and demand-oriented automation

Cleaning avoids cross‐contamination and sustains production safety and efficiency. While there have been discoveries for technical surfaces, data on activities for filter cloth are still in the early stages. In the food industry, there is a lack of knowledge and innovative ideas on how to clean cloths efficiently. This study combined high‐speed recordings with cleaning experiments. Cleaning of eleven filters was captured, enabling time‐resolved analysis of the cleaning degree, the cleaning homogeneity, and insights into the mechanisms. The findings divide cloth cleaning into three phases, each significantly influenced by the properties of the cloth. Exemplarily, close‐mesh cloths have smoother surfaces that facilitate cleaning. Coarse structures with flow channels on the cloth surface can complicate cleaning.

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“…This value originated from previous publications of Morsch et al. 13, 14, where this distance demonstrated high suitability.…”

Section: Methodsmentioning

confidence: 66%

“…Necessary cleaning parameters of wash jet cleaning for model and food‐related contaminations were studied by Morsch et al. 13, 14. Other publications focused on alternative cleaning procedures like pulsatile jet cleaning 15–18.…”

Section: Introductionmentioning

confidence: 99%

Jet Cleaning of Filter Cloths Used in Solid‐Liquid Separation: A High‐Speed Video Evaluation

et al. 2023

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“…The W number can also help up-scaling small-scale experiments to a technical scale. First experimental trials focussed on spent grains-loaded cloths were recently published by Morsch et al, (2020Morsch et al, ( ), (2021.…”

Section: Introductionmentioning

confidence: 99%

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

Werner

Lukas

Geier

et al. 2022

Int J of Food Sci Tech

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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.

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“…Due to increased ecological and economic awareness over the last decades, the beverage and food industries (especially breweries) have also highlighted the necessity to enhance cleaning concepts. Modern cleaning research has recognized the high potential in more optimized mechanical cleaning concepts and simultaneous chemical agent reduction [ 5 , 9 , 10 , 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

“…The first studies on cleaning spent grains loaded filter cloth with forward flushes were conducted by Morsch et al [ 11 , 12 , 29 ] and Werner et al [ 30 ]. Their conclusions were a promising starting point for investigating the industry applications of pulsed backflushes and breaking down decisive mechanisms in filter cloth cleaning.…”

Section: Introductionmentioning

confidence: 99%

Investigations on Backflush Cleaning of Spent Grain-Contaminated Filter Cloths Using Continuous and Pulsed Jets

Werner

Hummel

Geier

et al. 2022

Foods

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This study investigated the continuous and pulsed backflush cleaning of woven fabrics that act as filter media in the food and beverage industry. Especially in breweries, they are commonly used in mash filters to separate solid spent grains from liquid wort. After filtration, the removal of such cereal residues via self-discharge is necessary. However, this filter cake discharge is typically incomplete, and various spots remain contaminated. In addition to the reduced filter performance of subsequent batches, cross-contamination risk increases significantly. A reproducible contamination method focusing on the use case of a mash filter was developed for this study. Additionally, a residue analysis based on microscopical image processing helped to assess cleaning efficiency. The experimental part compared two backflushing procedures for mash filters and demonstrated fluid dynamical, procedural, and economic differences in cleaning. Specifically, pulsed jets show higher efficiency in reaching cleanliness faster, with fewer cleaning agents and less time. According to the experimental results, the fluid flow conditions depended highly on cloth geometry and mesh sizes. Larger mesh sizes significantly favored the cloth’s cleanability as a larger backflush volume can reach contamination. With these results, cloth cleaning can be improved, enabling the realization of demand-oriented cleaning concepts.

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In-situ cleaning process of chamber filter presses with sensor-controlled and demand-oriented automation

Cited by 6 publications

References 3 publications

Jet Cleaning of Filter Cloths Used in Solid‐Liquid Separation: A High‐Speed Video Evaluation

Jet Cleaning of Filter Cloths Used in Solid‐Liquid Separation: A High‐Speed Video Evaluation

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

Investigations on Backflush Cleaning of Spent Grain-Contaminated Filter Cloths Using Continuous and Pulsed Jets

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