African Journal of
Microbiology Research

  • Abbreviation: Afr. J. Microbiol. Res.
  • Language: English
  • ISSN: 1996-0808
  • DOI: 10.5897/AJMR
  • Start Year: 2007
  • Published Articles: 5056

Full Length Research Paper

Evaluating the efficacy of household filters used for the removal of bacterial contaminants from drinking water

Bayable Atnafu Kassa
  • Bayable Atnafu Kassa
  • Institute of Biotechnology, Addis Ababa University, Ethiopia.
  • Google Scholar
Adey Feleke Desta
  • Adey Feleke Desta
  • Department of Microbial, Cellular and Molecular Biology, College of Natural and Computational Sciences, Addis Ababa University, Ethiopia.
  • Google Scholar
Fassil Assefa
  • Fassil Assefa
  • Department of Microbial, Cellular and Molecular Biology, College of Natural and Computational Sciences, Addis Ababa University, Ethiopia.
  • Google Scholar


  •  Received: 21 April 2020
  •  Accepted: 01 June 2020
  •  Published: 30 June 2020

Abstract

Due to the erratic nature of microbial contaminants in drinking water, private and municipality water supply systems failed to deliver safe drinking water to households. In Ethiopia, there is lack of data and knowledge on the effectiveness of filter devices used to treat drinking water at household. This study aims to evaluate efficiency of household point of use filter devices (membrane filter, membrane with activated carbon, ceramic candle type filter and hybrid (multistage)) in reducing bacterial contaminants from drinking water. Percent reduction efficiency model was employed in evaluating bacterial removal efficiency. Membrane filter and membrane with activated carbon filter devices had good total coliform removal efficiency on the 1st and 2nd days than hybrid filter device which showed low removal efficiency. Similarly, all filter devices showed better fecal coliform removal efficiency on the 1st day compared to 2nd day but had low heterotrophic bacteria removal efficiency during the three days filtration. Fecal Streptococcus removal efficiency on the 2nd and 3rd days by all filter devices was low except the first day. The result in general showed that using of point of use filter devices for prolonged time could not guarantee in providing risk free drinking water at household level.

 

Key words: Coliform, drinking water, household filters, point of use, removal efficiency.