Microbial community analysis with a high PHA storage capacity

L. S. Serafim, P. C. Lemos, S. Rossetti, C. Levantesi, V. Tandoi, M. A. M. Reis

Research output: Contribution to journalConference articlepeer-review

36 Citations (Scopus)


Activated sludge was submitted to aerobic dynamic substrate feeding for the production of biodegradable plastics. Two sequencing batch reactors were operated with acetate or propionate as sole carbon substrates. With acetate a homopolymer of polyhydroxybutyrate (PHB) was obtained and with propionate a copolymer of hydroxybutyrate and hydroxyvalerate P(HB/HV) was produced. Three main morphotypes were identified in both sludges: two belong to the Alphaproteobacteria class and the third to the Betaproteobacteria class. Bacilli belonging to Betaproteobacteria were shown by FISH analysis, applied in combination with Nile Blue post-staining, to be the main responsible for PHAs storage. The latter were affiliated to Azoarcus genus within Betaproteobacteria.

Original languageEnglish
Pages (from-to)183-188
Number of pages6
JournalWater Science and Technology
Issue number1
Publication statusPublished - 7 Aug 2006
Event4th IWA Activated Sludge Population Dynamics Conference (ASPD4) - Gold Coast, Australia
Duration: 17 Jul 200520 Jul 2005


  • Acetate
  • Aerobic dynamic substrate feeding
  • FISH
  • Polyhydroxyalkanoates
  • Propionate
  • SBR


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