MBBRs as post-treatment to ozonation : Degradation of transformation products and ozone-resistant micropollutants
(2021) In Science of the Total Environment 754.- Abstract
The degradation potential of micropollutants and transformation products in biological post-treatment after ozonation is partly unknown. A pilot plant with ozonation and subsequent biological treatment in a moving bed biofilm reactor (MBBR) was thus operated over 16 months to investigate the removal of micropollutants and the formation and removal of N-oxide transformation products. Lab-scale kinetic experiments were performed in parallel. At a moderate ozone dose of 0.5 g O3 g−1 DOC, further degradation of gabapentin and 3 iodinated contrast media (iomeprol, iopamidol, and iohexol) could be induced by the biofilm at prolonged exposure times. To facilitate comparison of feeding regimens in biofilm systems a new... (More)
The degradation potential of micropollutants and transformation products in biological post-treatment after ozonation is partly unknown. A pilot plant with ozonation and subsequent biological treatment in a moving bed biofilm reactor (MBBR) was thus operated over 16 months to investigate the removal of micropollutants and the formation and removal of N-oxide transformation products. Lab-scale kinetic experiments were performed in parallel. At a moderate ozone dose of 0.5 g O3 g−1 DOC, further degradation of gabapentin and 3 iodinated contrast media (iomeprol, iopamidol, and iohexol) could be induced by the biofilm at prolonged exposure times. To facilitate comparison of feeding regimens in biofilm systems a new surface-related degradation rate constant was introduced. The availability of substrates in the pilot MBBR influenced the micropollutant degradation kinetics with increasing and decreasing degradation rates. N-oxides from erythromycin, clarithromycin, tramadol, and venlafaxine were formed during ozonation and could not be degraded by the biofilm.
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- author
- Edefell, Ellen LU ; Falås, Per LU ; Kharel, Suman ; Hagman, Marinette LU ; Christensson, Magnus ; Cimbritz, Michael LU and Bester, Kai
- organization
- publishing date
- 2021-02-01
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Contrast media, MBBR, N-oxides, Organic micropollutants, Ozonation, Transformation products
- in
- Science of the Total Environment
- volume
- 754
- article number
- 142103
- publisher
- Elsevier
- external identifiers
-
- scopus:85090424542
- pmid:32920394
- ISSN
- 0048-9697
- DOI
- 10.1016/j.scitotenv.2020.142103
- language
- English
- LU publication?
- yes
- id
- e1eb3f39-56b9-419c-9770-9fad9bded6bb
- date added to LUP
- 2020-09-29 13:45:55
- date last changed
- 2024-07-25 01:18:21
@article{e1eb3f39-56b9-419c-9770-9fad9bded6bb, abstract = {{<p>The degradation potential of micropollutants and transformation products in biological post-treatment after ozonation is partly unknown. A pilot plant with ozonation and subsequent biological treatment in a moving bed biofilm reactor (MBBR) was thus operated over 16 months to investigate the removal of micropollutants and the formation and removal of N-oxide transformation products. Lab-scale kinetic experiments were performed in parallel. At a moderate ozone dose of 0.5 g O<sub>3</sub> g<sup>−1</sup> DOC, further degradation of gabapentin and 3 iodinated contrast media (iomeprol, iopamidol, and iohexol) could be induced by the biofilm at prolonged exposure times. To facilitate comparison of feeding regimens in biofilm systems a new surface-related degradation rate constant was introduced. The availability of substrates in the pilot MBBR influenced the micropollutant degradation kinetics with increasing and decreasing degradation rates. N-oxides from erythromycin, clarithromycin, tramadol, and venlafaxine were formed during ozonation and could not be degraded by the biofilm.</p>}}, author = {{Edefell, Ellen and Falås, Per and Kharel, Suman and Hagman, Marinette and Christensson, Magnus and Cimbritz, Michael and Bester, Kai}}, issn = {{0048-9697}}, keywords = {{Contrast media; MBBR; N-oxides; Organic micropollutants; Ozonation; Transformation products}}, language = {{eng}}, month = {{02}}, publisher = {{Elsevier}}, series = {{Science of the Total Environment}}, title = {{MBBRs as post-treatment to ozonation : Degradation of transformation products and ozone-resistant micropollutants}}, url = {{http://dx.doi.org/10.1016/j.scitotenv.2020.142103}}, doi = {{10.1016/j.scitotenv.2020.142103}}, volume = {{754}}, year = {{2021}}, }