Inactivation of Deinococcus geothermalis bacteria in synthetic paper machine water by electrochemical oxidation

H. Särkkä, M. Vepsäläinen, M. Pulliainen, M. Sillanpää

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

Electrochemical oxidation of Deinococcus geothermalis bacteria was studied in synthetic paper machine water. Three electrodes, boron-doped diamond, mixed metal oxide (MMO) and PbO2, were tested as anodes. The electrochemical behaviour of the electrodes was investigated by cyclic voltammetry and the amounts of bacteria were measured as aerobic plate counts. Inactivation of bacteria was effective (>95%) at relatively long contact times (>30 min) and high current densities (50 mA/cm2) with all electrodes. Increasing the current density enhanced inactivation of bacteria in the case of the MMO electrode. Electrochemically generated chlorine and hypochlorite were the main oxidants in killing bacteria.

Original languageEnglish
Pages (from-to)95-99
Number of pages5
JournalJournal of Pulp and Paper Science
Volume33
Issue number2
Publication statusPublished - Apr 2007
Externally publishedYes

Keywords

  • Bacteria
  • Electric current
  • Electrodes
  • Microorganism control
  • Oxidation
  • White water

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering
  • General Materials Science
  • Media Technology

Fingerprint

Dive into the research topics of 'Inactivation of Deinococcus geothermalis bacteria in synthetic paper machine water by electrochemical oxidation'. Together they form a unique fingerprint.

Cite this