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Hazardous events in membrane bioreactors - Part 2: Impacts on removal of trace organic chemical contaminants

Trinh, Trang, Coleman, Heather M., Stuetz, Richard M., Drewes, Jorg E., Khan, Stuart J. and Le-Clech, Pierre (2016) Hazardous events in membrane bioreactors - Part 2: Impacts on removal of trace organic chemical contaminants. Journal of Membrane Science, 497 . pp. 504-513. [Journal article]

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DOI: 10.1016/j.memsci.2015.05.052

Abstract

In complement to the initial study assessing the impact of hazardous events on membrane bioreactor (MBR) bulk performances, detailed assessment of the consequences of similar events has now been conducted on the removal of a wide range of trace organic chemical contaminants. The investigated chemicals include 12 steroidal hormones, 4 xenoestrogens, 2 pesticides, 23 pharmaceuticals and personal care products. Under salinity, DNP, ammonia and organic carbon shock conditions, overall removal of hydrophobic chemicals (log DpH7≥2.5) was not or only slightly affected. Since these chemicals are largely adsorbed to biomass, these results imply that biotransformation within the biomass structure itself was maintained. However, removal of hydrophilic chemicals (log DpH7<2.5) was commonly observed to be impeded under shock load conditions, indicating loss of bioactivity. This was observed primarily for chemicals which have low or moderate biotransformability. In comparison, easily biotransformable chemicals were largely removed. The susceptibility of less readily biotransformable hydrophilic chemicals to shock loads was due to their reliance upon specific organisms or metabolic pathways for their biotransformation. The results of these experiments show that hydrophilic chemicals with low biotransformability (e.g., sulfamethoxazole, ketoprofen, gemfibrozil and naproxen) could be sensitive indicators for monitoring impacts of hazardous events on removal of trace organic chemicals by MBRs.

Item Type:Journal article
Keywords:Membrane treatment, process validation; Operational problems; Risk assessments; Shock loads; Treatment failure Water recycling; Treatment failure; Shock loading
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:34811
Deposited By: Dr Heather Coleman
Deposited On:15 Jun 2016 09:26
Last Modified:01 Mar 2017 11:41

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