Modified stainless steel surfaces targeted to reduce fouling – Evaluation of fouling by milk components

Rosmaninho, R.; Santos, Olga; Nylander, Tommy; Paulsson, Marie; Beuf, Morgane; Bénézech, Thierry; Yiantsios, S.G.; Andritsos, N.; Karabelas, A.J.; Rizzo, Gerhard; Müller‐Steinhagen, Hans; Melo, L. F.

doi:10.1016/j.jfoodeng.2006.09.008

Cited by 124 publications

(79 citation statements)

References 28 publications

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“…For example Excalibur, a type of PTFE coating with a rough surface has been found to increase the fouling ability of a surface by 32% (Beuf et al, 2003). Rosmaninho et al (2007Rosmaninho et al ( ,2008 studied the adhesion of milk components under different flow conditions onto various surfaces and found that adhesion depended strongly on both surface and the deposit.…”

Section: Introductionmentioning

confidence: 99%

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Akhtar

Bowen

Asteriadou

et al. 2010

Food and Bioproducts Processing

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Many researchers have studied the effects of changing the surface on fouling and cleaning. In biofouling the 'Baier curve' is a well-known result which relates adhesion to surface energy, and papers on the effect of changing surface energy to food fouling can be found more than 40 years ago. Recently the use of modified surfaces, at least at a research level, has been widespread. Here two different ways of studying surface-deposit interactions have been compared. Atomic force microscopy (AFM) is a method for probing interactions at a molecular level, and can measure (for example) the interaction between substrate and surfaces at a nm-scale. At a μm-mm level, we have developed a micromanipulation tool that can measure the force required to remove the deposit; the measure incorporates both surface and bulk deformation effects. The two methods have been compared by studying a range of model soils: toothpaste, as an example of a soil that can be removed by fluid flow alone, and confectionery soils. Removal has been studied from glass, stainless steel and fluorinated surfaces as examples of the sort of surfaces that can be found in practice. AFM measurements were made by using functionalized tips in force mode. The two types of probe give similar results, although the rheology of the soil affects the measurement from the micromanipulation probe under some circumstances. The data suggests that either method could be used to test candidate surfaces. 2 INTRODUCTIONThe cleaning of process plant is a difficult multiscale problem; metre-scale plant becomes clean as a result of fluid and chemical action on surfaces of individual plant items, acting at the meso-and nano scale. A sketch of the different length scales involved in cleaning process plant is given as Figure 1. To remove deposit from surfaces is difficult both to understand scientifically and to do industrially (Wilson, 2005; Fryer et al., 2006)

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Section: Introductionmentioning

confidence: 99%

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Akhtar

Bowen

Asteriadou

et al. 2010

Food and Bioproducts Processing

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“…It has showed that the amount of fouling is determined by the type of construction material used to manufacture the exchangers. Beuf et al (2003) and Rosmaninho et al (2007) showed that the type of construction material, its finish, microstructure, charge and surface energy, as well as the presence of layers, significantly affect the rate of milk sediment accumulation. However, it has also been speculated that the limitation of the sediment layer formation can be affected by the modification of interphase interactions between the heat exchange surface and the sediment (Augustin et al 2007).…”

mentioning

confidence: 99%

“…They suggest that this is a sufficiently smooth surface that does not cause any accumulation of impurities and can be easily cleaned and maintained (Holah 2000;Lelieveld et al 2003;Tamime 2008). Many authors studied the influence of the surface type on soil contamination and cleanability (Santos et al 2003;Rosmaninho et al 2007;Gordon et al 2014). A comprehensive overview of previous research on this subject was presented by Detry et al (2010).…”

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confidence: 99%

An analysis of milk fouling formed during heat treatment on a stainless steel surface with different degrees of roughness

Piepiórka-Stepuk¹,

Tandecka²,

Jakubowski³

2016

Czech J. Food Sci.

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Results of research on the effect of stainless steel (SS) surface roughness on the amount and microscopic structure of milk impurities, formed under the influence of high-temperature milk processing are presented. Three types of plates of different roughness were used in the study: Ra = 0.028 µm; Ra = 0.174 µm; Ra = 0.445 µm. The plates were immersed in raw milk and heated at 85–90°C for 30 min, imitating pasteurisation conditions. As a result of this action, a milk sediment difficult to remove was created. The structure of impurities was determined by the Confocal Scanning Laser Microscope CSLM method. The analysis of the microscopic structure of formed milk impurities enabled their classification into three types depending on their structure and way of their bonding to the surface. The research results suggested that the roughness plays a prominent role in the level of fouling and probably in cleaning effectiveness.

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“…The fouling parameters used in the scenarios are based loosely on those reported in reference 24. Scenario B represents a process change that reduces Rf∞, such as operating at higher flow velocities to increase the shear stress acting on the biofilm [26], reducing the nutrient load [27], or manipulating surface adhesion [28]. Scenario C represents a process change that decreases the rate, such as reducing the level of nutrients present in the water or changing the temperature, which affects both oxygen solubility and bacterial growth rates [1].…”

Section: Schedulingmentioning

confidence: 99%

Choosing When to Clean and How to Clean Biofilms in Heat Exchangers

Pogiatzis

Vassiliadis

Mergulhão

et al. 2014

Heat Transfer Engineering

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Biofouling in heat exchangers can be managed by regular cleaning. A mathematical framework for the optimization problem involved in selecting the best cleaning schedules for such units is presented that considers (i) an induction period associated with conditioning and colonization, which introduces complexity to the fouling kinetics, and (ii) the existence of several outcomes from cleaning, depending on the choice of cleaning method. The problem is to decide how, when, and which exchanger to clean. A mixed integer nonlinear programming approach, based on the use of a logistic function to model fouling resistance-time dynamics, is shown to give tractable results. The methodology is illustrated with a case study involving a small network of three heat exchangers. An optimized solution based on a cost/performance analysis shows that the cleaning intervals and cleaning methods differ for each exchanger.

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Modified stainless steel surfaces targeted to reduce fouling – Evaluation of fouling by milk components

Cited by 124 publications

References 28 publications

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

Matching the nano- to the meso-scale: Measuring deposit–surface interactions with atomic force microscopy and micromanipulation

An analysis of milk fouling formed during heat treatment on a stainless steel surface with different degrees of roughness

Choosing When to Clean and How to Clean Biofilms in Heat Exchangers

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