Full – length paper

World Journal of Microbiology and Biotechnology

, Volume 23, Issue 9, pp 1239-1244

Decolorization of Acid Red 27 and Reactive Red 2 by Enterococcus faecalis under a batch system

  • Widhi HandayaniAffiliated withGraduate Program of Biology, Satya Wacana Christian University
  • , V. Irene MeitiniartiAffiliated withFaculty of Biology, Satya Wacana Christian University Email author 
  • , Kris Herawan TimotiusAffiliated withChemistry Section, Faculty of Science & Mathematics, Satya Wacana Christian University

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Abstract

The objectives of this study were to investigate: (1) the capacity of Enterococcus faecalis on the decolorization of the azo dyes Acid Red 27 and Reactive Red 2; and (2) the growth characteristics of E. faecalis on those dyes. E. faecalis was able to decolorize Acid Red 27 and Reactive Red 2 effectively. High decolorization efficiency (95–100%) was achieved within 3 h of incubation for Acid Red 27, and 12 h for Reactive Red 2, at room temperature, neutral pH, static and non-aerated condition. Growth characteristics of E. faecalis on azo dyes, which were indicated by cell growth rate, biomass production, and growth yield, was worse than the control. E. faecalis grew better on Acid Red 27 rather than Reactive Red 2.

Keywords

Acid Red 27 Azo dyes Batch growth Decolorization Enterococcus faecalis Reactive Red 2