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 language | English (US) |
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Pages (from-to) | 763-784 |
Number of pages | 22 |
Journal | Journal of Environmental Science and Health - Part A Toxic/Hazardous Substances and Environmental Engineering |
Volume | 32 |
Issue number | 3 |
DOIs | |
State | Published - 1997 |
All Science Journal Classification (ASJC) codes
- Environmental Engineering
Keywords
- Aeration
- Beggiatoa
- Fixed-film
- Sulfate removal