Properties of UV inactivation of Aggregated <i>Escherichia coli</i>

• MASAIKE Mie

  東京大学大学院 工学系研究科都市工学専攻

• OGUMA Kumiko

  東京大学大学院 工学系研究科都市工学専攻

• HASHIMOTO Takashi

  東京大学 先端科学技術研究センター

• TAKIZAWA Satoshi

  東京大学大学院 工学系研究科都市工学専攻

Bibliographic Information

Other Title

• 凝集状態にある大腸菌の紫外線不活化特性
• ギョウシュウ ジョウタイ ニ アル ダイチョウキン ノ シガイセン フカツカ トクセイ

Abstract

 In order to quantitatively understand the effect of aggregation of bacteria in water on the inactivation effect by UV, UV irradiation is performed on a sample containing E. coli that has been aggregated using alginic acid and calcium ions, and the inactivation effect is determined by the cultural method. The aggregation state of E. coli was adjusted with initial E. coli concentration (10⁶, 10⁷, 10⁸ CFU/mL) and calcium ion concentration (0, 10, 20 mM). As a result, aggregation affected the inactivation effect only when the initial E. coli concentration was 10⁸ CFU/mL, and the inactivation effect was minimized at a calcium ion concentration of 20 mM. This is because when initial E. coli concentration was 10⁸ CFU/mL, it is considered that there were enough E. coli blocking E. coli from UV. This study suggested that the initial E. coli concentration and the size of flocks in the sample affect the inactivation effect of E. coli.

Journal

• Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)

  Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research) 75 (7), III_85-III_90, 2019

  Japan Society of Civil Engineers

Keywords

• aggregation
• flock
• ultraviolet-light (UV)
• disinfection
• water treatment

Details

• CRID: 1390002184885181056
• NII Article ID: 130007814684
• ISSN: 13415115
• ISSN: 21856648
• DOI: 10.2208/jscejer.75.7_iii_85
• NDL BIB ID: 032671505
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I032671505
• Web Site: https://www.jstage.jst.go.jp/article/jscejer/75/7/75_III_85/_pdf
• Text Lang: ja
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed