Malaysian Journal of Microbiology (Jan 2009)

Isolation, Screening and Development of Local Bacterial Consortia With Azo Dyes Decolourising Capability

  • Khadijah, O.,
  • Lee, K. K.,
  • Mohd Faiz, F. A.

Journal volume & issue
Vol. 5, no. 1
pp. 25 – 32

Abstract

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A total of 1540 bacterial isolates were isolated and screened for their ability to degrade selected azo dyes. Of these, nine isolates were chosen for further studies based on their ability to degrade a wide spectrum of dyes efficiently and rapidly. Several microbial consortia were developed and tested for their effectiveness. Overall the consortia were able to degrade 70 - 100% colour within 72 hours compared to 60 – 97% colour removed by individual isolates. A microbial consortium labelled C15 showed good growth in agitation culture but the colour removal was best in static culture with 80 - 100% colour removed in less than 72 hours. Based on the 16S rRNA sequencing, two of the bacterial isolates in C15 belong to the Chryseobacterium genus while the other one belongs to Flavobacterium genus.

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