Continuous-sterilization system that uses photosemiconductor powders.

Tadashi Matsunaga, R. Tomoda, T. Nakajima, N. Nakamura, T. Komine

Research output: Contribution to journalArticle

310 Citations (Scopus)

Abstract

We report a novel photochemical sterilization system in which Escherichia coli cells were sterilized with photosemiconductor powders (titanium oxide). For sterilization that could be used in practice, it was necessary to separate the TiO2 powders from the cell suspension. Therefore, semiconductor powders were immobilized on acetylcellulose membranes. We constructed a continuous-sterilization system consisting of a TiO2-immobilized acetylcellulose membrane reactor, a mercury lamp, and a masterflex pump. As a result, under the various sterilization conditions examined, E. coli (10(2) cells per ml) was sterilized to less than 1% survival when the cell suspension flowed in this system at a mean residence time of 16.0 min under irradiation (1,800 microeinsteins/m2 per s). We found that this system was reusable.

Original languageEnglish
Pages (from-to)1330-1333
Number of pages4
JournalApplied and Environmental Microbiology
Volume54
Issue number6
Publication statusPublished - 1988 Jun
Externally publishedYes

Fingerprint

Powders
powders
cell suspension culture
suspension systems
Escherichia coli
semiconductors
Suspensions
titanium
membrane
mercury
pumps
Semiconductors
oxides
Membranes
irradiation
Mercury
cells
residence time
Cell Survival
pump

ASJC Scopus subject areas

  • Biotechnology
  • Environmental Science(all)
  • Microbiology

Cite this

Matsunaga, T., Tomoda, R., Nakajima, T., Nakamura, N., & Komine, T. (1988). Continuous-sterilization system that uses photosemiconductor powders. Applied and Environmental Microbiology, 54(6), 1330-1333.

Continuous-sterilization system that uses photosemiconductor powders. / Matsunaga, Tadashi; Tomoda, R.; Nakajima, T.; Nakamura, N.; Komine, T.

In: Applied and Environmental Microbiology, Vol. 54, No. 6, 06.1988, p. 1330-1333.

Research output: Contribution to journalArticle

Matsunaga, T, Tomoda, R, Nakajima, T, Nakamura, N & Komine, T 1988, 'Continuous-sterilization system that uses photosemiconductor powders.', Applied and Environmental Microbiology, vol. 54, no. 6, pp. 1330-1333.
Matsunaga T, Tomoda R, Nakajima T, Nakamura N, Komine T. Continuous-sterilization system that uses photosemiconductor powders. Applied and Environmental Microbiology. 1988 Jun;54(6):1330-1333.
Matsunaga, Tadashi ; Tomoda, R. ; Nakajima, T. ; Nakamura, N. ; Komine, T. / Continuous-sterilization system that uses photosemiconductor powders. In: Applied and Environmental Microbiology. 1988 ; Vol. 54, No. 6. pp. 1330-1333.
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