Ammonia half-saturation constants of sludge with different community compositions of ammonia-oxidizing bacteria
| Autor: | Pattaraporn Kunapongkiti, Chaiwat Rongsayamanont, Tawan Limpiyakorn, Pantip Kayee |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Environmental Engineering biology Microorganism 030106 microbiology Environmental engineering Ammonia-oxidizing bacteria biology.organism_classification 03 medical and health sciences Ammonia chemistry.chemical_compound 030104 developmental biology Nitrosomonas oligotropha chemistry Nitrosomonas europaea Environmental chemistry Sewage treatment Saturation (chemistry) |
| Zdroj: | Environmental Engineering Research. 21:140-144 |
| ISSN: | 1226-1025 |
| DOI: | 10.4491/eer.2015.121 |
| Popis: | Owing to the kinetic differences in ammonia oxidation among ammonia-oxidizing microorganisms (AOM), there is no standard set of kinetic values that can be used as a representative set for nitrifying wastewater treatment plant (WWTP) design. As a result, this study clarified a link between the half-saturation constants for ammonia oxidation (Ks) and the dominant ammonia-oxidizing bacterial (AOB) groups in sludge from full-scale WWTPs and laboratory-scale nitrifying reactors. Quantitative polymerase chain reaction analyses revealed that AOB affiliated with the Nitrosomonas oligotropha cluster were the dominant AOM groups in the sludge taken from the low-ammonia-level WWTPs, while AOB associate with the Nitrosomonas europaea cluster comprised the majority of AOM groups in the sludge taken from the high-ammonia-level WWTPs and nitrifying reactors. A respirometric assay demonstrated that the ammonia Ks values for the high-ammonia- level WWTPs and nitrifying reactors were higher than those of the low-ammonia-level plants. Using the Ks values of available AOM cultures as a reference, the Ks values of the analyzed sludge were mainly influenced by the dominant AOB species. These findings implied that.different sets of kinetic values may be required for WWTPs with different dominant AOM species for more accurate WWTP design and operations. |
| Databáze: | OpenAIRE |
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