Electrochemical sterilization of bacteria adsorbed on granular activated carbon

Tadashi Matsunaga, Satoshi Nakasono, Seiichi Masuda

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

The electrochemical sterilization of bacteria adsorbed on granular activated carbon (GAC) was demonstrated. The survival ratio of bacteria on GAC was dependent upon the applied potential. The survival ratio of Escherichia coli, Staphylococcus aureus, Bacillus subtilis and Saccharomyces cerevisiae vs. saturated calomel electrode (SCE) was below 1% at 0.75, 0.8, 1.0 and 0.65 V, respectively. The electrochemical sterilization of tap water containing E. coli was carried out when 3.5 ml of the cell suspension (4.0 × 102 cells/ml was incubated with 2.0 g of GAC for 5 h at 0.7 V vs. SCE. The number of E. coli adsorbed on GAC and the cell concentration in the water decreased rapidly. E. coli on GAC were electrochemically killed and the cell numbers did not increase.

Original languageEnglish
Pages (from-to)255-259
Number of pages5
JournalFEMS Microbiology Letters
Volume93
Issue number3
DOIs
Publication statusPublished - 1992 Jun 15
Externally publishedYes

Keywords

  • Electrochemical sterilization
  • Granular activated carbon
  • Growth inhibition
  • Water treatment

ASJC Scopus subject areas

  • Microbiology
  • Molecular Biology
  • Genetics

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