Mathematical models and bacterial communities for ammonia toxicity in mesophilic anaerobes not acclimated to high concentrations of ammonia
- Title
- Mathematical models and bacterial communities for ammonia toxicity in mesophilic anaerobes not acclimated to high concentrations of ammonia
- Author
- 김문일
- Keywords
- anaerobic toxicity assay; bacterial community; mesophilic anaerobic digestion; specific methanogenic activity; total ammonia nitrogen
- Issue Date
- 2016-08
- Publisher
- IWA PUBLISHING
- Citation
- WATER SCIENCE AND TECHNOLOGY, v. 74, NO. 4, Page. 935-942
- Abstract
- In this study, we evaluated ammonia toxicity in mesophilic anaerobic digestion at various pH values and total ammonia nitrogen (TAN) concentrations. We performed anaerobic toxicity assays (ATAs) to evaluate the toxicity effects of TAN and pH on mesophilic anaerobic digestion. Modeling based on the results of the ATAs indicated that the specific methanogenic activity (SMA) decreased by 30% at a TAN concentration higher than 3.0 g/L compared to a TAN concentration of 0 g/L. In addition, the highest SMA for a given TAN level (0.5-10.0 g/L) was observed at a pH of around 7.6. The results of bacterial community analyses showed that the diversity and richness of microorganisms with increasing TAN concentration were decreased. Chloroflexi and Synergistetes were the dominant phyla at TAN concentrations less than 3.0 g/L, and Firmicutes was the dominant phylum at TAN concentrations higher than 3.0 g/L, implying that the ammonia toxicity concentration may influence the kind of dominant species. In conclusion, to start a stable mesophilic anaerobic digestion concerning ammonia toxicity, a TAN concentration less than 3.0 g/L is preferable.
- URI
- https://iwaponline.com/wst/article-abstract/74/4/935/24854/Mathematical-models-and-bacterial-communities-for?redirectedFrom=fulltexthttps://repository.hanyang.ac.kr/handle/20.500.11754/183185
- ISSN
- 0273-1223;1996-9732
- DOI
- 10.2166/wst.2016.274
- Appears in Collections:
- COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > CIVIL AND ENVIRONMENTAL ENGINEERING(건설환경공학과) > Articles
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