期刊
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
卷 97, 期 12, 页码 5575-5583出版社
SPRINGER
DOI: 10.1007/s00253-012-4346-z
关键词
Anammox bacteria; Aggregates; Growth characteristics; Metabolism characteristics
资金
- Natural Science Foundation [31070110]
- Zhejiang Provincial Natural Science Foundation [Z5110094]
- Ph.D. Programs Foundation of Education Ministry of China [J 20120067]
- Shanghai Tongji Gao Tingyao Environmental Science and Technology Development Foundation
The present study reported the growth and metabolism characteristics of anaerobic ammonium-oxidizing (anammox) bacteria aggregates in an expanded granular sludge bed (EGSB). The results showed that the anammox bacteria aggregates presented starvation, growth, and inhibition phase along with the increase of substrate supply. The substrate conversion rates for survival were 0.05 kgNH (4) (+) -N/(kgVSS center dot day), 0.07 kgNO (2) (-) -N/(kgVSS center dot day), and 0.12 kgN/(kgVSS center dot day); the substrate conversion rates for maximum growth were 0.21 kgNH (4) (+) -N/(kgVSS center dot day), 0.24 kgNH (4) (+) -N/(kgVSS center dot day), and 0.45 kgNH (4) (+) -N/(kgVSS center dot day), respectively. In the growth phase, the yield of anammox bacteria aggregates was 0.14 gVSS/(gNH (4) (+) -N), 0.12 gVSS/(gNO (2) (-) -N), and 0.70 gVSS/(gNO (3) (-) -N); the yield of extracellular polymeric substances (EPS) was 0.11 gEPS/(gNH (4) (+) -N), 0.09 gEPS/(gNO (2) (-) -N), and 0.55 gEPS/(gNO (3) (-) -N), respectively. The EPS contents in anammox bacteria aggregates were high compared to that in anaerobic granular sludge. Speculated from the cell yield, the energy for anammox bacteria growth was not only from nitrite oxidation, but also from anammox reaction.
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