Hygienic design and Cleaning-In-Place (CIP) systems in breweries

Davies, Simon H.; Sykes, T.; Philips, Marianne Ekman; Hancock, J. C.

doi:10.1016/b978-1-78242-331-7.00010-1

Cited by 5 publications

(10 citation statements)

References 11 publications

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“…The highest turbidity of the CiP solutions was observed with NaOH (F), used in the cleaning of the mash filter (turbidity 201 NTU and solids 17.5 g/L) reflecting the soil in the filter used to remove the solids from the wort prior to boiling . Despite the disassembly of the filter, solids dump and diaphragm rinsing, the soil remained on the filter plates which was removed by CiP.…”

Section: Resultsmentioning

confidence: 99%

“…The caustic and acid detergents used to clean tanks and wort main were characterised by lower turbidity and solids with NaOH (T) (4.2 g/L solids and 44 NTU) and H 3 PO 4 + HNO 3 (1.6 g/L solids and 16 NTU). The acid solutions were ‘cleaner’ as they are used in the CiP cycle after the caustic clean (Table ) that removes most of the soil from the surfaces of the equipment . Further, the mineral impurities recovered by the acid pass into the solution, but do not result in an increase in turbidity and are easily sedimented.…”

Section: Resultsmentioning

confidence: 99%

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Impact of storage at room temperature on the properties of CiP solutions

et al. 2019

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This work reports the analysis of cleaning solutions used in cleaning in place (CiP) and the changes that occur during storage at room temperature. Tests were performed on different solutions used to clean brewhouse vessels and a mash filter in a local brewery. The solutions were collected from CiP tanks after regeneration and were stored for three months in darkness at room temperature. Over time, the physical, chemical and microbiological parameters of the cleaning solutions were analysed. At the end of the study, the solutions were evaluated in terms of surface wetting and cleaning capability. The results showed that storage of the solutions at room temperature contributed to the agglomeration of particulates into larger conglomerates that may contribute to clarification of cleaning solutions by sedimentation. However, other parameters of the stored CiP solutions did not change. © 2019 The Institute of Brewing & Distilling

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Impact of storage at room temperature on the properties of CiP solutions

et al. 2019

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“…The level of impurities in both these CiP solutions was due to the type of process equipment that was cleaned. For example, during mash filtration, mash solids are removed, and sweet wort is obtained . Thus, in the case of NaOH (F), after cleaning the mash filter the solution is rich in spent grain material .…”

Section: Resultsmentioning

confidence: 99%

“…After cleaning, the turbidity and the amount of suspended solids in the acid wash (H 3 PO 4 + HNO 3 ) solution were found to be much lower (26 NTU and 0.21 g/L) than that of the caustic solutions (Figure c). This can be explained by the fact that the CIP system's cleaning programme uses an initial alkaline wash first, where most of the soil is removed from the surface ; this is followed by an acid wash that primarily removes mineral impurities. These impurities do not significantly affect the turbidity of the acid based cleaning solution, and they sediment easily.…”

Section: Resultsmentioning

confidence: 99%

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Analysis of physical impurities in regenerated solutions used in cleaning brewing systems

Piepiórka-Stepuk

2018

J. Inst. Brew.

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This work reports the analysis of impurities found in recovered caustic and acid cleaning solutions that were regenerated postcleaning by the process of sedimentation. Samples were taken weekly for 25 weeks from a brewery cleaning-in-place (CiP) system before CiP (clean solution, free of solid particles) and after cleaning in the brewhouse and mash filter. The volume and concentration of the solid sediment was measured in addition to particle size. Accordingly, the purification of recovered CiP solutions via sedimentation was less than effective, resulting in soiling which did not settle upon sedimentation and remained in the cleaning solution as a suspension.

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