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PAC dosing to an MBBR – Effects on adsorption of micropollutants, nitrification and microbial community

Cimbritz, Michael LU ; Edefell, Ellen LU ; Thörnqvist, Elias ; El-taliawy, Haitam ; Ekenberg, Maria ; Burzio, Cecilia ; Modin, Oskar ; Persson, Frank ; Wilén, Britt Marie and Bester, Kai , et al. (2019) In Science of the Total Environment 677. p.571-579
Abstract

Two nitrifying MBBR reactors were operated in parallel, one with PAC dosing and one without, to determine the effects of PAC dosing on nitrification and micropollutant adsorption in municipal wastewater. The removal of micropollutants was evaluated for several doses of PAC and batch experiments were performed to measure adsorption kinetics and nitrification rates. The influence of PAC on the nitrifying microbial community was examined by high-throughput amplicon sequencing. Long-term operation of the pilot reactors showed that nitrification could be maintained while supplying PAC at increasing doses, as confirmed by high nitrification rates and significant abundance of nitrifying bacteria. The adsorption of organic micropollutants could... (More)

Two nitrifying MBBR reactors were operated in parallel, one with PAC dosing and one without, to determine the effects of PAC dosing on nitrification and micropollutant adsorption in municipal wastewater. The removal of micropollutants was evaluated for several doses of PAC and batch experiments were performed to measure adsorption kinetics and nitrification rates. The influence of PAC on the nitrifying microbial community was examined by high-throughput amplicon sequencing. Long-term operation of the pilot reactors showed that nitrification could be maintained while supplying PAC at increasing doses, as confirmed by high nitrification rates and significant abundance of nitrifying bacteria. The adsorption of organic micropollutants could be controlled by the PAC dose, and increased dosing resulted in corresponding improvements in removal efficiency. Biomass, suspended or attached to carriers, did not interfere with the adsorption of organic micropollutants. Freundlich isotherms obtained from the batch experiments were used to predict removal of organic micropollutants in the pilot reactors, suggesting that batch adsorption experiments can be used to predict micropollutant removal on a full scale. Collectively, the results show that nitrification and adsorption of organic micropollutants can be performed simultaneously in an MBBR.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
MBBR, Nitrification, Organic micropollutants, PAC, Pharmaceuticals
in
Science of the Total Environment
volume
677
pages
9 pages
publisher
Elsevier
external identifiers
  • scopus:85064981882
  • pmid:31067478
ISSN
0048-9697
DOI
10.1016/j.scitotenv.2019.04.261
language
English
LU publication?
yes
id
26b35150-bd64-4d30-a5dd-d35efc3f6f5c
date added to LUP
2019-05-13 11:44:23
date last changed
2024-04-02 03:39:24
@article{26b35150-bd64-4d30-a5dd-d35efc3f6f5c,
  abstract     = {{<p>Two nitrifying MBBR reactors were operated in parallel, one with PAC dosing and one without, to determine the effects of PAC dosing on nitrification and micropollutant adsorption in municipal wastewater. The removal of micropollutants was evaluated for several doses of PAC and batch experiments were performed to measure adsorption kinetics and nitrification rates. The influence of PAC on the nitrifying microbial community was examined by high-throughput amplicon sequencing. Long-term operation of the pilot reactors showed that nitrification could be maintained while supplying PAC at increasing doses, as confirmed by high nitrification rates and significant abundance of nitrifying bacteria. The adsorption of organic micropollutants could be controlled by the PAC dose, and increased dosing resulted in corresponding improvements in removal efficiency. Biomass, suspended or attached to carriers, did not interfere with the adsorption of organic micropollutants. Freundlich isotherms obtained from the batch experiments were used to predict removal of organic micropollutants in the pilot reactors, suggesting that batch adsorption experiments can be used to predict micropollutant removal on a full scale. Collectively, the results show that nitrification and adsorption of organic micropollutants can be performed simultaneously in an MBBR.</p>}},
  author       = {{Cimbritz, Michael and Edefell, Ellen and Thörnqvist, Elias and El-taliawy, Haitam and Ekenberg, Maria and Burzio, Cecilia and Modin, Oskar and Persson, Frank and Wilén, Britt Marie and Bester, Kai and Falås, Per}},
  issn         = {{0048-9697}},
  keywords     = {{MBBR; Nitrification; Organic micropollutants; PAC; Pharmaceuticals}},
  language     = {{eng}},
  pages        = {{571--579}},
  publisher    = {{Elsevier}},
  series       = {{Science of the Total Environment}},
  title        = {{PAC dosing to an MBBR – Effects on adsorption of micropollutants, nitrification and microbial community}},
  url          = {{http://dx.doi.org/10.1016/j.scitotenv.2019.04.261}},
  doi          = {{10.1016/j.scitotenv.2019.04.261}},
  volume       = {{677}},
  year         = {{2019}},
}