Fouling Mechanisms and Antifouling Technology

3 March 2020

Alfa Laval
Rudeboksvägen 1
SE-226 55 Lund
Sweden

Fouling issues can constitute a huge technical and economical challenge in many industries. The seminar takes a closer look at how fouling and scaling affect different industries, and how new and current technologies are used to address the issues concerning fouling. The seminar has a broad scope, and participants will find inspiration from other industries and research institutes.

The programme will start by discussing general fouling mechanisms and mitigation strategies. Next, several examples and cases from industry and research will be presented, including different types of antifouling coatings, and hygienic design considerations. Finally, the interplay between fouling and corrosion will be discussed, and the day ends with a tour of Alfa Laval.

09:00-09:30 Registration and breakfast
09:30-09:40 Welcome
09:40-10:10
Structural and compositional changes during dairy fouling formation and removal

Tommy Nylander, Professor, Lund University, Sweden

The formation of fouling during dairy processing as well as most other food products leads in most cases to the formation of an intertwined mineral and protein-based networks. The process is kinetically controlled and strongly dependent on process conditions. The deposition process is a balance between the attachment of the different components to the surface, their surfaces interactions and bulk interactions. In fact, chemical interactions and aggregation in bulk can make the component less sticky. Any cleaning process must take into account that in order to remove fouling, you need to remove both the protein and mineral network.

Tommy Nylander was appointed senior lecturer in Physical Chemistry, Lund University in 2000, and in 2007 he was promoted to full professor in the same department. The main theme of Prof. Nylander's scientific activity has been to relate interfacial behaviour of surface-active molecule to their solution behaviour. He has published 260 scientific articles and book chapters within his research area. Nylander has a large experience on application research and on international collaboration both with academia and industry.
10:10-10:40
Fouling & cleaning in gasketed plate heat exchangers

Olga Santos, Material Specialist, Alfa Laval, Sweden

This talk will give an overview of the different fouling types that heat exchangers are subjected to. It will start by describing fouling and its consequences, followed by a description of the different types of fouling, the applications where it is encountered, how to prevent it, and what factors play a role in each of the different types. The last part of the talk will deal with different strategies for heat exchanger cleaning. In the past years, Alfa Laval has been working with different coatings for fouling reduction in heat exchangers and some results in scaling applications will be presented briefly.

Olga Santos has been a Material Specialist working with fouling, cleaning and coatings for plate heat exchangers at the Materials and Chemistry Center, Alfa Laval Lund since 2011. She holds a PhD in Food Engineering on coated stainless steel surfaces to reduce fouling in the dairy industry from Lund University. She has completed several Postdoc projects from Lund University and Malmö University.
10:40-11:10 Coffee break
11.10-11.40
Fouling control coatings for ship hulls

Søren Kiil, Associate Professor, DTU Chemical Engineering

In this presentation, the various coating types available (commercially and in research) for combatting biofouling on ship hulls and other underwater structures are reviewed. The working mechanisms of the coatings and the advantages and disadvantages of the product types are discussed. Finally, we will take a look at the test methods involved in research and development, including field studies.

Søren Kiil is an Associate Professor in the Hempel Foundation Coatings Science and Technology (CoaST) group at DTU Chemical Engineering, Denmark. He has worked on coatings for the heavy duty industry, including formulation, practical test methods, and mathematical modelling for more than 20 years.
11.40-12.10
Importance of using hygienic design in food production equipment

Annette Baltzer Larsen, Consultant, Force Technology

It is important to use hygienic design as much as possible in the construction of food industry equipment, as it enables efficient and fast cleaning. In this talk, Annette Baltzer Larsen will present the different elements in hygienic design such as materials, joints, drainablity, etc. The efficiency of cleaning procedures can be monitored by analyzing the rinse water, however it is important that the rinse water is coming from everywhere in the closed equipment (pipes, valves, tanks, etc.). Otherwise it is not possible to use the rinse water as an indicator for the cleanability of the equipment. Results from a case study using rinse water for evaluating the efficiency of the cleaning will be showed.

Annette Baltzer Larsen is a dairy engineer and has worked with the hygienic design, optimized cleaning, cleaning validation, biofilm, thermoduric bacteria, food safety, and food quality the last 22 years, the last 12 years at Force Technology.
12:10-13:20 Lunch
13:20-13:50
Experience with anti-fouling coating in plate heat exchangers

Clemens Wictor, Project Manager R&D Technology Development, Alfa Laval, Sweden

Fouling of heat exchangers in the chemical industry, oil & gas industry, power plants, etc. results in significant loss of performance. This leads to production stops for cleaning and increased operating costs. Alfa Laval has been working on mitigating fouling by altering the properties of the metal surface with coatings. The coating has resulted in a significant improvement of the gasketed plate heat exchanger performance as well as less downtime for cleaning. Savings in energy, water, cleaning chemicals, etc. all contribute to a more sustainable and environmentally friendly operation.

Clemens Wictor has been Project Manager & Design Engineer on projects to improve designs and evaluate new technologies, including anti fouling coatings, for plate heat exchangers in the R&D Technology Development, Alfa Laval Lund since 2008. He holds a BSc in Mechanical Engineering from Halmstad University.
13:50-14:20
Possible solutions to fouling and scaling in heat exchangers

Annemette Hindhede Jensen, CEO, Siox Aps

This talk will present a new type of anti-fouling coatings which eliminate the attachment of unwanted species on the surfaces of heat exchangers. These coatings enable the heat exchangers to work at highest possible efficiency at all times. During the presentation some of the achievements and possible energy and cost savings will be presented, e.g. coatings installed in district heating units with sensors to track the efficiency.

Annemette Hindhede Jensen is CEO of Siox and holds a Msc in Chemistry and a PhD in Electrochemistry and Materials Science.
14:20-14:50 Coffee break
14:50-15:20
A result of fouling: microbially influenced corrosion (MIC)

Matthias Graff, Senior Consultant, Danfoss A/S

Fouling has several disadvantages for technical systems, one of the most serious being microbial influenced corrosion, commonly known as MIC. This presentation will show participants the corrosion risk connected with fouling and MIC and make them able to identify possible risk in their own systems. Matthias Graff will give an overview of micro-organisms that can cause corrosion. The term “biofilm” will be explained as well as the limitations for microbial life, i.e. formation of biofilm. Last but not least, several MIC case studies will be presented.

Matthias Graff has studied microbiology, biochemistry and geology. He has worked at the Technical University of Braunschweig, Germany, where he performed applied research in geomicrobiology and corrosion research. Later, he owned a private expert consultancy before he joined Danfoss A/S Technology Centre in October 2007 as Senior Consultant. Matthias is acting worldwide as officially appointed and certified expert.
15:20-15:30 Closing remarks
15:30-16:15 Tour of Alfa Laval

Fouling Mechanisms and Antifouling Technology

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Registration fee
315 euros (+78.75 euros Swedish VAT) for members of ATV-SEMAPP and other collaborating organisations
395 euros (+98.75 euros Swedish VAT) for non-members
140 euros for PhD students (+35 euros Swedish VAT)
35 euros (+8.75 euros Swedish VAT) for MSc and BSc student members of ATV-SEMAPP (Membership is free of charge – register here. Early bird discount does not apply)
The fee includes talks, breakfast, lunch and coffee breaks.

Get early bird discount of 30 euros when registering before 15 January 2020.

Binding registration
Registration is binding, however substitutions are accepted at any time.

Questions
Please do not hesitate to contact ATV-SEMAPP by e-mailing atv-semapp@mek.dtu.dk or phoning Jytte Laursen +45 4525 4898 or Charlotte Leser +45 4525 4899.