Full-scale use of glycogen-accumulating organisms for excess biological carbon removal

Bernadett Kiss, Vince Bakos, Wen Tso Liu, Andrea Jobbágy

Research output: Contribution to journalArticlepeer-review


The purpose of this study has been to verify the efficient full-scale applicability of glycogen-accumulating organisms (GAOs) for excess biological carbon removal, that is, for removing more carbon substrate than the amount of available nutrients would allow in the conventional activated sludge process of microbial growth. This aims to cost-effectively overcome the problem of viscous bulking occurring in a fully aerated system, with nutrient deficiency. Analytical data measured at the wastewater treatment plant of the Balatonboglár (BB) winery in Balatonboglár, Hungary, containing consecutive unaerated and aerated activated sludge basins, reflected a high performance with efficient carbon removal and good sludge settling, without dosing any external nutrient source to the severely nitrogen- and phosphorous-deficient influent. Supplementary laboratory-scale batch experiments and microbiological tests verified the abundance of GAOs in the activated sludge system and elucidated their role in efficient excess biological carbon removal.

Original languageEnglish (US)
Pages (from-to)855-864
Number of pages10
JournalWater Environment Research
Issue number9
StatePublished - Sep 2011


  • Excess biological carbon removal
  • Glycogen-accumulating organism
  • Nutrient deficiency

ASJC Scopus subject areas

  • Water Science and Technology
  • Ecological Modeling
  • Pollution
  • Waste Management and Disposal
  • Environmental Chemistry


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