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Effective elimination of water-borne Escherichia coli using archaeal poly-g-glutamate-based materials

1 Course of Applied Bioresource Science, United Graduate School of Agricultural Sciences, Ehime University, Matsuyama, Ehime 790-8566, Japan
2 Faculty of Agriculture, Kochi University, Nankoku, Kochi 783-8502, Japan

Escherichia coli is used worldwide as a fecal indicator species to assess the quality of (drinking) water. Active carbons are used for the removal of chemical pollutants, but are ineffective in the inactivation of water-borne pathogens such as E. coli. Herein, we developed poly-g-glutamate-ion complex-coated active carbons (PGAIC-AC) and examined their ability to eliminate E. coli from a laboratory model of water pollution (~ 2.0 × 104 CFU/mL) at room temperature. The results showed that E. coli was virtually eliminated when using PGAIC-AC as a dispersant. In fact, the log reduction values were estimated to be > 1.19. In this study, we further constructed simple but effective bacteria-elimination system with a PGAIC-AC–embedded column. This PGAIC-AC system can be utilized to purify water when no electricity or specialized equipment is available.
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Keywords bacteria elimination; water; purification; poly-γ-glutamate; active carbons

Citation: Yuichi Hakumai, Kanae Yamaguchi, Sawami Nakayama, Makoto Ashiuchi. Effective elimination of water-borne Escherichia coli using archaeal poly-g-glutamate-based materials. AIMS Microbiology, 2016, 2(3): 222-229. doi: 10.3934/microbiol.2016.3.222

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This article has been cited by

  • 1. Makoto Ashiuchi, Yuichi Hakumai, Sawami Nakayama, Haruna Higashiuchi, Kosuke Shimada, Engineering antimicrobial coating of archaeal poly-γ-glutamate-based materials using non-covalent crosslinkages, Scientific Reports, 2018, 8, 1, 10.1038/s41598-018-23017-x

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Copyright Info: 2016, Makoto Ashiuchi, et al., licensee AIMS Press. This is an open access article distributed under the terms of the Creative Commons Attribution Licese (http://creativecommons.org/licenses/by/4.0)

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