Electrochemical inactivation of paper mill bacteria with mixed metal oxide electrode

Heikki Särkkä, Mikko Vepsäläinen, Martti Pulliainen, Mika Sillanpää

Research output: Contribution to journalArticlepeer-review

49 Citations (Scopus)

Abstract

In this study electrochemical inactivation of selected bacteria living in paper mill circulating waters was investigated. Three aerobic bacteria species (Deinococcus geothermalis, Pseudoxanthomonas taiwanensis and Meiothermus silvanus) were inactivated effectively (>2 log) at a mixed metal oxide (MMO) electrode in 3 min. The influence of parameters, such as current density and initial pH or chloride concentration of synthetic paper machine water (SPW) on the inactivation efficiency were studied. Increasing current density and initial chloride concentration of SPW increased the inactivation rate but change of pH value did not have significant influence on the inactivation rate. It was observed that inactivation was mainly due to the electrochemically generated chlorine/hypochlorite. Electrochemical oxidation showed good performance for inactivation these primary biofilm forming bacteria species with improved current efficiency by higher initial chloride concentrations.

Original languageEnglish
Pages (from-to)208-213
Number of pages6
JournalJournal of Hazardous Materials
Volume156
Issue number1-3
DOIs
Publication statusPublished - 15 Aug 2008
Externally publishedYes

Keywords

  • Biofilm
  • Chlorine evolution
  • Electrochemical inactivation
  • Mixed metal oxide
  • Paper machine circulating water

ASJC Scopus subject areas

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis

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