Microbiological problems in paper machine environments

Hanna-Leena Alakomi, Kirsi Kujanpää, Laila Partanen, Maija-Liisa Suihko, Satu Salo, Matti Siika-aho, Maria Saarela, Tiina Mattila-Sandholm, Laura Raaska

Research output: Book/ReportReportProfessional

1 Citation (Scopus)

Abstract

Paper and board machines offer microorganisms a favourable environment, and hence their numbers may be quite high without causing significant problems for runnability or end product safety. Microbial contamination of paper machine environment may result in spoilage of raw materials, slime build-up and contamination of end product by microbes or microbial metabolites. The costs of microbial damage to the industry could be significantly reduced if the species, characteristics and life cycles of the harmful microorganisms were known in addition to the ways they spread. This literature survey compiles the information available about the species and life cycles of microorganisms causing harm in paper and board machines from raw materials to end products. The main sources of microbial contamination in the paper mill systems are described including water, cellulosic raw material, broke and papermaking chemicals as a contamination source. Paper machines provide nutrients and conditions for microorganisms to grow either sessile in shelter of biofilm on surfaces or as planctonic cells in the circulating process water. Biofilm deposits and harmful activities of their microorganisms are discussed. Contamination of end product may occur during the manufacturing process or at a later stage as recontamination resulting in microbial growth on the surface of the product. The literature survey lists the most important factors of end product contamination such as recycling, role of spore-forming bacteria, fungi and actinomycetes, migration of microorganisms from packaging materials to foods as well as offensive odours and quality problems. Microbiological methods used in studying the microbial ecology of paper machine environments have been collated. Conventional and novel methods used to reduce or to limit the amount of microbes or microbial activity, especially in circulation waters and raw materials, and to control and prevent deposit formation on paper machine are discussed.
Original languageEnglish
Place of PublicationEspoo
PublisherVTT Technical Research Centre of Finland
Number of pages97
ISBN (Print)951-38-6064-7
Publication statusPublished - 2002
MoE publication typeD4 Published development or research report or study

Publication series

NameVTT Tiedotteita - Research Notes
PublisherVTT
No.2152
ISSN (Print)1235-0605

Fingerprint

microorganism
biofilm
life cycle
microbial ecology
shelter
odor
microbial activity
product
contamination
spore
metabolite
mill
manufacturing
recycling
fungus
safety
water
damage
bacterium
food

Keywords

  • paper industry
  • products
  • contamination
  • microbes
  • bacteria
  • fungi
  • chemicals
  • slime
  • biofilm
  • hazards

Cite this

Alakomi, H-L., Kujanpää, K., Partanen, L., Suihko, M-L., Salo, S., Siika-aho, M., ... Raaska, L. (2002). Microbiological problems in paper machine environments. Espoo: VTT Technical Research Centre of Finland. VTT Tiedotteita - Meddelanden - Research Notes, No. 2152
Alakomi, Hanna-Leena ; Kujanpää, Kirsi ; Partanen, Laila ; Suihko, Maija-Liisa ; Salo, Satu ; Siika-aho, Matti ; Saarela, Maria ; Mattila-Sandholm, Tiina ; Raaska, Laura. / Microbiological problems in paper machine environments. Espoo : VTT Technical Research Centre of Finland, 2002. 97 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2152).
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Alakomi, H-L, Kujanpää, K, Partanen, L, Suihko, M-L, Salo, S, Siika-aho, M, Saarela, M, Mattila-Sandholm, T & Raaska, L 2002, Microbiological problems in paper machine environments. VTT Tiedotteita - Meddelanden - Research Notes, no. 2152, VTT Technical Research Centre of Finland, Espoo.

Microbiological problems in paper machine environments. / Alakomi, Hanna-Leena; Kujanpää, Kirsi; Partanen, Laila; Suihko, Maija-Liisa; Salo, Satu; Siika-aho, Matti; Saarela, Maria; Mattila-Sandholm, Tiina; Raaska, Laura.

Espoo : VTT Technical Research Centre of Finland, 2002. 97 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2152).

Research output: Book/ReportReportProfessional

TY - BOOK

T1 - Microbiological problems in paper machine environments

AU - Alakomi, Hanna-Leena

AU - Kujanpää, Kirsi

AU - Partanen, Laila

AU - Suihko, Maija-Liisa

AU - Salo, Satu

AU - Siika-aho, Matti

AU - Saarela, Maria

AU - Mattila-Sandholm, Tiina

AU - Raaska, Laura

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N2 - Paper and board machines offer microorganisms a favourable environment, and hence their numbers may be quite high without causing significant problems for runnability or end product safety. Microbial contamination of paper machine environment may result in spoilage of raw materials, slime build-up and contamination of end product by microbes or microbial metabolites. The costs of microbial damage to the industry could be significantly reduced if the species, characteristics and life cycles of the harmful microorganisms were known in addition to the ways they spread. This literature survey compiles the information available about the species and life cycles of microorganisms causing harm in paper and board machines from raw materials to end products. The main sources of microbial contamination in the paper mill systems are described including water, cellulosic raw material, broke and papermaking chemicals as a contamination source. Paper machines provide nutrients and conditions for microorganisms to grow either sessile in shelter of biofilm on surfaces or as planctonic cells in the circulating process water. Biofilm deposits and harmful activities of their microorganisms are discussed. Contamination of end product may occur during the manufacturing process or at a later stage as recontamination resulting in microbial growth on the surface of the product. The literature survey lists the most important factors of end product contamination such as recycling, role of spore-forming bacteria, fungi and actinomycetes, migration of microorganisms from packaging materials to foods as well as offensive odours and quality problems. Microbiological methods used in studying the microbial ecology of paper machine environments have been collated. Conventional and novel methods used to reduce or to limit the amount of microbes or microbial activity, especially in circulation waters and raw materials, and to control and prevent deposit formation on paper machine are discussed.

AB - Paper and board machines offer microorganisms a favourable environment, and hence their numbers may be quite high without causing significant problems for runnability or end product safety. Microbial contamination of paper machine environment may result in spoilage of raw materials, slime build-up and contamination of end product by microbes or microbial metabolites. The costs of microbial damage to the industry could be significantly reduced if the species, characteristics and life cycles of the harmful microorganisms were known in addition to the ways they spread. This literature survey compiles the information available about the species and life cycles of microorganisms causing harm in paper and board machines from raw materials to end products. The main sources of microbial contamination in the paper mill systems are described including water, cellulosic raw material, broke and papermaking chemicals as a contamination source. Paper machines provide nutrients and conditions for microorganisms to grow either sessile in shelter of biofilm on surfaces or as planctonic cells in the circulating process water. Biofilm deposits and harmful activities of their microorganisms are discussed. Contamination of end product may occur during the manufacturing process or at a later stage as recontamination resulting in microbial growth on the surface of the product. The literature survey lists the most important factors of end product contamination such as recycling, role of spore-forming bacteria, fungi and actinomycetes, migration of microorganisms from packaging materials to foods as well as offensive odours and quality problems. Microbiological methods used in studying the microbial ecology of paper machine environments have been collated. Conventional and novel methods used to reduce or to limit the amount of microbes or microbial activity, especially in circulation waters and raw materials, and to control and prevent deposit formation on paper machine are discussed.

KW - paper industry

KW - products

KW - contamination

KW - microbes

KW - bacteria

KW - fungi

KW - chemicals

KW - slime

KW - biofilm

KW - hazards

M3 - Report

SN - 951-38-6064-7

T3 - VTT Tiedotteita - Research Notes

BT - Microbiological problems in paper machine environments

PB - VTT Technical Research Centre of Finland

CY - Espoo

ER -

Alakomi H-L, Kujanpää K, Partanen L, Suihko M-L, Salo S, Siika-aho M et al. Microbiological problems in paper machine environments. Espoo: VTT Technical Research Centre of Finland, 2002. 97 p. (VTT Tiedotteita - Meddelanden - Research Notes; No. 2152).