Removal of bacteria from seawater by foam separation using surface-active protein

• SUZUKI Yoshihiro

  Dep. of Civil and Environmental Engineering, Miyazaki University

• HANAGASAKI Nobuaki

  Dep. of Civil and Environmental Engineering, Miyazaki University

• YOSHIDA Terutoyo

  Dep. of Biological Production and Environmental Science, Miyazaki University

• MARUYAMA Toshiroh

  Dep. of Civil and Environmental Engineering, Miyazaki University

Bibliographic Information

Other Title

• 界面活性タンパク質を用いた泡沫分離法による海水からの細菌除去

Abstract

The removal of bacteria from rearing seawater of fish or using seawater in fishing port is important from the viewpoint of the reduction of infection risk and hygienics of public health. It is necessary to develop seawater purification technology for the improvement of hygienic conditions on the coastal environment. In this study, the removal of suspended bacteria Enterococcus faecalis from seawater by foam separation using several kinds of surface-active proteins as a chemical agent was examined. The removal efficiency of enterococcus was extremely low by foam separation using each protein without coagulation, because these surface-active materials did not function as a collector. When processing by foam separation with coagulation as a pretreatment, however, proteins such as milk casein and fish mucus showed the greatest capability of suspended bacteria. For treatment of seawater containing enterococcus (10⁷CFU/mL), the removal efficiency of counts number was over 99% with the small dosages of iron coagulant (FeCl₃) lmg-Fe/L and casein lmg/L. Foam separation using surface-active protein with coagulation process has a high potential as a new method for removing bacteria from seawater.

Journal

• ENVIRONMENTAL ENGINEERING RESEARCH

  ENVIRONMENTAL ENGINEERING RESEARCH 41 147-153, 2004

  Japan Society of Civil Engineers

Keywords

• bacteria
• Enterococcus faecalis
• seawater
• hygienics
• foam separation
• surface-active protein

Details

• CRID: 1390282679089477248
• NII Article ID: 130003949364
• DOI: 10.11532/proes1992.41.147
• ISSN: 1884829X
• ISSN: 13415115
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed