Aeration effects on Beggiatoa in a laboratory fixed-film growth system

Jae Chun Chung, Peter F. Strom

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

The enrichment of Beggiatoa was derived in a lab-scale continuous flow fixed-film growth system. Under a low aeration and high BOD organic loading condition, the enrichment of Beggiatoa was easily achieved on the glucose-fed slime while it took fairly long time on the acetate-fed one. An increased aeration resulted in a decrease in the Beggiatoa population for the acetate-fed slime, but not for the glucose-fed slime, except slightly at very high aeration level. Sulfate removal rate in both Beggiatoa dominated slimes was generally low, between 10-30%. The glucose-fed slime showed a much higher sulfate removal at high organic loading. The aeration effects on Beggiatoa and sulfate removal were understandable in the context of the Beggiatoa-Desulfovibrio interaction, diffusion and uptake rate of substrate. Glucose diffusion and uptake rate may more rapid, thus air could not penetrate as efficiently into the sulfide-emitting anaerobic layer inhabited by sulfate reducing bacteria such as Desulfovibrio. This may have resulted in less inhibitory effects on the sulfate reducing bacteria.

Original languageEnglish (US)
Pages (from-to)763-784
Number of pages22
JournalJournal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering
Volume32
Issue number3
DOIs
StatePublished - 1997

All Science Journal Classification (ASJC) codes

  • Environmental Engineering

Keywords

  • Aeration
  • Beggiatoa
  • Fixed-film
  • Sulfate removal

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