A new dual biocide concept for fine papermaking

Jani Kiuru, Jenni Sievänen, Irina Tsitko, Heikki Pajari, Pauliina Tukiainen

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Electrochemical generation of oxidants was studied to find new solutions to control microbial contamination at paper mills. Laboratory and semi-pilot trials using a Wet End Simulator indicated that the combination of an electrochemically produced halogen-containing oxidant together with sodium percarbonate was an efficient new biocide concept, especially in fine papermaking. Addition of sodium percarbonate considerably reduced the need for halogen-containing biocides, thus lessening risk of corrosion. The trials with samples from fine paper machines indicated that the new concept required halogenated biocides to be dosed first, and the time delay between additions of biocide needed to be sufficient to ensure that no residual halogen was left when sodium percarbonate was added. Electrochemical generation enables on-site biocide production, which decreases transportation cost, risk associated with storage of hazardous chemicals, and biocide lost due to degradation. Thus, on-site generation of biocides together with potential reduction in amount of halogen containing oxidants make this dual concept economically attractive and environmentally positive.
Original languageEnglish
Pages (from-to)2145-2160
Number of pages16
JournalBioResources
Volume6
Issue number2
Publication statusPublished - 2011
MoE publication typeA1 Journal article-refereed

Fingerprint

Biocides
Papermaking
Disinfectants
pesticide
Halogens
halogen
Oxidants
oxidant
Sodium
sodium
Hazardous Substances
simulator
corrosion
Time delay
mill
Contamination
Simulators
Corrosion
Degradation
degradation

Keywords

  • Biocide
  • oxidant
  • papermaking
  • white water
  • broke
  • electrochemical treatment
  • microorganism control

Cite this

Kiuru, Jani ; Sievänen, Jenni ; Tsitko, Irina ; Pajari, Heikki ; Tukiainen, Pauliina. / A new dual biocide concept for fine papermaking. In: BioResources. 2011 ; Vol. 6, No. 2. pp. 2145-2160.
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Kiuru, J, Sievänen, J, Tsitko, I, Pajari, H & Tukiainen, P 2011, 'A new dual biocide concept for fine papermaking', BioResources, vol. 6, no. 2, pp. 2145-2160.

A new dual biocide concept for fine papermaking. / Kiuru, Jani; Sievänen, Jenni; Tsitko, Irina; Pajari, Heikki; Tukiainen, Pauliina.

In: BioResources, Vol. 6, No. 2, 2011, p. 2145-2160.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - A new dual biocide concept for fine papermaking

AU - Kiuru, Jani

AU - Sievänen, Jenni

AU - Tsitko, Irina

AU - Pajari, Heikki

AU - Tukiainen, Pauliina

PY - 2011

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AB - Electrochemical generation of oxidants was studied to find new solutions to control microbial contamination at paper mills. Laboratory and semi-pilot trials using a Wet End Simulator indicated that the combination of an electrochemically produced halogen-containing oxidant together with sodium percarbonate was an efficient new biocide concept, especially in fine papermaking. Addition of sodium percarbonate considerably reduced the need for halogen-containing biocides, thus lessening risk of corrosion. The trials with samples from fine paper machines indicated that the new concept required halogenated biocides to be dosed first, and the time delay between additions of biocide needed to be sufficient to ensure that no residual halogen was left when sodium percarbonate was added. Electrochemical generation enables on-site biocide production, which decreases transportation cost, risk associated with storage of hazardous chemicals, and biocide lost due to degradation. Thus, on-site generation of biocides together with potential reduction in amount of halogen containing oxidants make this dual concept economically attractive and environmentally positive.

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KW - papermaking

KW - white water

KW - broke

KW - electrochemical treatment

KW - microorganism control

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