Model-based assessment of estrogen removal by nitrifying activated sludge

Peng, L; Dai, X; Liu, Y; Sun, J; Song, S; Ni, BJ

Model-based assessment of estrogen removal by nitrifying activated sludge

Peng, L Dai, X Liu, Y

Sun, J Song, S Ni, BJ

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Publication Type:: Journal Article
Citation:: Chemosphere, 2018, 197 pp. 430 - 437
Issue Date:: 2018-04-01

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Field	Value	Language
dc.contributor.author	Peng, L	en_US
dc.contributor.author	Dai, X	en_US
dc.contributor.author	Liu, Y https://orcid.org/0000-0001-6677-7961	en_US
dc.contributor.author	Sun, J	en_US
dc.contributor.author	Song, S	en_US
dc.contributor.author	Ni, BJ https://orcid.org/0000-0002-1129-7837	en_US
dc.date.available	2018-01-10	en_US
dc.date.issued	2018-04-01	en_US
dc.identifier.citation	Chemosphere, 2018, 197 pp. 430 - 437	en_US
dc.identifier.issn	0045-6535	en_US
dc.identifier.uri	http://hdl.handle.net/10453/134287
dc.description.abstract	© 2018 Elsevier Ltd Complete removal of estrogens such as estrone (E1), estradiol (E2), estriol (E3) and ethinylestradiol (EE2) in wastewater treatment is essential since their release and accumulation in natural water bodies are giving rise to environment and health issues. To improve our understanding towards the estrogen bioremediation process, a mathematical model was proposed for describing estrogen removal by nitrifying activated sludge. Four pathways were involved in the developed model: i) biosorption by activated sludge flocs; ii) cometabolic biodegradation linked to ammonia oxidizing bacteria (AOB) growth; iii) non-growth biodegradation by AOB; and iv) biodegradation by heterotrophic bacteria (HB). The degradation kinetics was implemented into activated sludge model (ASM) framework with consideration of interactions between substrate update and microorganism growth as well as endogenous respiration. The model was calibrated and validated by fitting model predictions against two sets of batch experimental data under different conditions. The model could satisfactorily capture all the dynamics of nitrogen, organic matters (COD), and estrogens. Modeling results suggest that for E1, E2 and EE2, AOB-linked biodegradation is dominant over biodegradation by HB at all investigated COD dosing levels. However, for E3, the increase of COD dosage triggers a shift of dominant pathway from AOB biodegradation to HB biodegradation. Adsorption becomes the main contributor to estrogen removal at high biomass concentrations.	en_US
dc.relation.ispartof	Chemosphere	en_US
dc.relation.isbasedon	10.1016/j.chemosphere.2018.01.035	en_US
dc.subject.classification	Meteorology & Atmospheric Sciences	en_US
dc.subject.classification	Environmental Sciences	en_US
dc.subject.mesh	Bacteria	en_US
dc.subject.mesh	Nitrogen	en_US
dc.subject.mesh	Estradiol	en_US
dc.subject.mesh	Estriol	en_US
dc.subject.mesh	Estrone	en_US
dc.subject.mesh	Ethinyl Estradiol	en_US
dc.subject.mesh	Estradiol Congeners	en_US
dc.subject.mesh	Estrogens	en_US
dc.subject.mesh	Water Pollutants, Chemical	en_US
dc.subject.mesh	Sewage	en_US
dc.subject.mesh	Waste Disposal, Fluid	en_US
dc.subject.mesh	Kinetics	en_US
dc.subject.mesh	Models, Chemical	en_US
dc.subject.mesh	Biodegradation, Environmental	en_US
dc.subject.mesh	Heterotrophic Processes	en_US
dc.subject.mesh	Nitrification	en_US
dc.subject.mesh	Waste Water	en_US
dc.title	Model-based assessment of estrogen removal by nitrifying activated sludge	en_US
dc.type	Journal Article
utslib.citation.volume	197	en_US
utslib.for	0904 Chemical Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	197	en_US

Abstract:

© 2018 Elsevier Ltd Complete removal of estrogens such as estrone (E1), estradiol (E2), estriol (E3) and ethinylestradiol (EE2) in wastewater treatment is essential since their release and accumulation in natural water bodies are giving rise to environment and health issues. To improve our understanding towards the estrogen bioremediation process, a mathematical model was proposed for describing estrogen removal by nitrifying activated sludge. Four pathways were involved in the developed model: i) biosorption by activated sludge flocs; ii) cometabolic biodegradation linked to ammonia oxidizing bacteria (AOB) growth; iii) non-growth biodegradation by AOB; and iv) biodegradation by heterotrophic bacteria (HB). The degradation kinetics was implemented into activated sludge model (ASM) framework with consideration of interactions between substrate update and microorganism growth as well as endogenous respiration. The model was calibrated and validated by fitting model predictions against two sets of batch experimental data under different conditions. The model could satisfactorily capture all the dynamics of nitrogen, organic matters (COD), and estrogens. Modeling results suggest that for E1, E2 and EE2, AOB-linked biodegradation is dominant over biodegradation by HB at all investigated COD dosing levels. However, for E3, the increase of COD dosage triggers a shift of dominant pathway from AOB biodegradation to HB biodegradation. Adsorption becomes the main contributor to estrogen removal at high biomass concentrations.

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http://hdl.handle.net/10453/134287