| Records |
| Author |
del Rio, A.V.; Campos, J.L.; Da Silva, C.; Pedrouso, A.; Mosquera-Corral, A. |
| Title |
Determination of the intrinsic kinetic parameters of ammonia-oxidizing and nitrite-oxidizing bacteria in granular and flocculent sludge |
Type |
|
| Year |
2019 |
Publication |
Separation And Purification Technology |
Abbreviated Journal |
Sep. Purif. Technol. |
| Volume |
213 |
Issue |
|
Pages |
571-577 |
| Keywords |
Ammonia oxidizing bacteria; Flocs; Granules; Kinetics; Monod; Nitrite oxidizing bacteria |
| Abstract |
The different oxygen affinities of ammonia-oxidizing (AOB) and nitrite-oxidizing bacteria (NOB) are often used to define the operational strategy to achieve partial nitritation (PN) required before the anammox (AMX) process. For this purpose, apparent kinetic parameters are mainly used in the case of granular sludge, which can lead to errors when defining the operational conditions to obtain only nitritation (avoiding nitratation). In the present study, a mathematical methodology is proposed to determine the intrinsic kinetic parameters of AOB and NOB in granular sludge based on data obtained by respirometric assays. Additionally, the oxygen affinity constant (K-O2) and maximum specific rate (r(max)) of flocculent and granular sludge sample, produced under mainstream and sidestream conditions were determined at various temperatures (15, 20 and 30 degrees C). The results show that for granules, the intrinsic K-O2 and r(max) values were lower and higher, respectively, than the apparent values. Furthermore, the K-O2 values for flocs and granules at all of the tested temperatures were lower for NOB than for AOB. The values obtained for the kinetic parameters indicated that it is impossible to maintain partial nitritation by only controlling the dissolved oxygen concentration. |
| Address |
[del Rio, Angeles Val; Pedrouso, Alba; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Dept Chem Engn, Sch Engn, E-15705 Santiago De Compostela, Spain, Email: mangeles.val@usc.es; |
| Corporate Author |
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Thesis |
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| Publisher |
Elsevier Science Bv |
Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
|
Series Issue |
|
Edition |
|
| ISSN |
1383-5866 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
WOS:000457657200054 |
Approved |
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| Call Number |
UAI @ eduardo.moreno @ |
Serial |
977 |
| Permanent link to this record |
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| Author |
del Rio, A.V.; da Silva, T.; Martins, T.H.; Foresti, E.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A. |
| Title |
Partial Nitritation-Anammox Granules: Short-Term Inhibitory Effects of Seven Metals on Anammox Activity |
Type |
|
| Year |
2017 |
Publication |
Water Air And Soil Pollution |
Abbreviated Journal |
Water Air Soil Pollut. |
| Volume |
228 |
Issue |
11 |
Pages |
9 pp |
| Keywords |
Ammonia oxidizing bacteria; Anammox; Granules; IC50; Nitrogen removal |
| Abstract |
The inhibitory effect of seven different metals on the specific anammox activity of granular biomass, collected from a single stage partial nitritation/anammox reactor, was evaluated. The concentration of each metal that led to a 50% inhibition concentration (IC50) was 19.3 mg Cu+2/L, 26.9 mg Cr+2/L, 45.6 mg Pb+2/L, 59.1 mg Zn+2/L, 69.2 mg Ni+2/L, 174.6 mg Cd+2/L, and 175.8 mg Mn+2/L. In experiments performed with granules mechanically disintegrated (flocculent-like sludge), the IC50 for Cd+2 corresponded to a concentration of 93.1 mg Cd+2/L. These results indicate that the granular structure might act as a physical barrier to protect anammox bacteria from toxics. Furthermore, the presence of an external layer of ammonia oxidizing bacteria seems to mitigate the inhibitory effect of the metals, as the values of IC50 obtained in this study for anammox activity were higher than those previously reported for anammox granules. Additionally, the results obtained confirmed that copper is one of the most inhibitory metals for anammox activity and revealed that chromium, scarcely studied yet, has a similar potential inhibitory effect. |
| Address |
[del Rio, Angeles Val; Mendez, Ramon; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, E-15782 Santiago De Compostela, Spain, Email: mangeles.val@usc.es |
| Corporate Author |
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Thesis |
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| Publisher |
Springer |
Place of Publication |
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Editor |
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| Language |
English |
Summary Language |
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Original Title |
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| Series Editor |
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Series Title |
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Abbreviated Series Title |
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| Series Volume |
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Series Issue |
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Edition |
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| ISSN |
0049-6979 |
ISBN |
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Medium |
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| Area |
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Expedition |
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Conference |
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| Notes |
WOS:000415958200002 |
Approved |
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| Call Number |
UAI @ eduardo.moreno @ |
Serial |
790 |
| Permanent link to this record |
