Control of microorganisms Microorganisms are present in every paper and board machine, every day. Their entry in the wet-end is inevitable because the machines are open aequous processes receiving contaminants from fresh water, air and non-sterile raw materials. The process provides good conditions for multiplication of microorganisms, because temperature and pH are typically favourable for
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Control of microorganisms
After reading this article you will..
- understand the different type of problems which uncontrolled growth of microorganisms can create.
- understand that in control of microorganisms the targets can vary. In some cases, reaching of the control target may require complete eracidation of all microbial activity, whereas in another case it can be sufficient to maintain microbial activity to a level that causes pH changes, as an example.
Content
Natural fibre products
- Printing and writing papers
- Paperboards
- Tissue
- Nonwovens
- Speciality papers
- Production of paper and board
- Stock and water systems
- Web forming
- Wet pressing
- Drying of natural fibre products
- Surface sizing
- Pigment coating
- Finishing
- Converting of paper and board
- Papermaking chemistry
- Paper physics
- Printing
Authors & references
Author:
Marko Kolari, Kemira Oyj
References:
- Flemming H-C, Meier M and T Schild (2013). Mini-review: microbial problems in paper production. Biofouling: The Journal of Bioadhesion and Biofilm Research, DOI:10.1080/08927014.2013.798865
- Paulus W (Ed.) 2005. Directory of microbicides for the protection of materials. Springer, Dordrecht, Netherlands. 787 p. ISBN 1-4020-2817-2.
- Kolari, M. and Rintala, J. 2017. Better hygiene in food-packaging board at reduced risk of rejected tonnage and machine corrosion. PaperAge Vol 133 (1): 20–23.
- Ekman, J., Hietaniemi, M., Kolari, M., Nelson, M. and Keegan, K. 2018. Novel Starch Saving Program Improves Sustainability in Board Manufacturing through the Reuse of Recycled Fiber Starch. World Pulp & Paper, May 2018.
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This page has been updated 29.06.2021
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