Ulster University Logo

Assessment of trace organic chemical removal by a membrane bioreactor using GC-MS and a yeast screen bioassay

Coleman, Heather M., Troester, Martin, Khan, Stuart, McDonald, James, Watkins, Graeme and Stuetz, Richard (2009) Assessment of trace organic chemical removal by a membrane bioreactor using GC-MS and a yeast screen bioassay. Environmental Toxicology and Chemistry, 28 (12). pp. 2537-2545. [Journal article]

[img] Text - Published Version
Indefinitely restricted to Repository staff only.

330kB

Abstract

A membrane bioreactor (MBR) was assessed for the removal of estrogens, androgens, and a selection of pharmaceuticalsand personal care products. The biomass and aqueous components of the MBR were investigated to determine whether removal wasby biodegradation or by adsorption to the biomass. Removal was monitored using chemical analysis by gas chromatography/massspectrometry (GC-MS) as well as biological analysis using estrogenic and androgenic yeast assays. Results showed that the MBR waseffective in removing the compounds of concern from raw influent with removal rates between 78 and 99%. Removal efficiencies were comparable or better than those reported for conventional activated sludge systems, which was attributed to the relatively high sludge retention time of the MBR. The biomass component showed significant concentrations of salicylic acid, triclosan, and 4-tertoctylphenol. Estrogenic and androgenic activity was also measured in the biomass. Estrone was identified as the main compound responsible for the estrogenic activity. It was concluded that the main removal pathway was biodegradation, but sorption to biomass may also be important, particularly for triclosan and 4-tert-octylphenol.

Item Type:Journal article
Keywords:Membrane bioreactors, Endocrine-disrupting chemicals, Pharmaceuticals Personal care products
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:34997
Deposited By: Dr Heather Coleman
Deposited On:19 Aug 2016 13:58
Last Modified:07 Nov 2017 17:54

Repository Staff Only: item control page