Effects of powdered activated carbon addition on filtration performance and dynamic membrane layer properties in a hybrid DMBR process

Hu, Y; Yang, Y; Wang, XC; Hao Ngo, H; Sun, Q; Li, S; Tang, J; Yu, Z

Effects of powdered activated carbon addition on filtration performance and dynamic membrane layer properties in a hybrid DMBR process

Hu, Y Yang, Y Wang, XC Hao Ngo, H

Sun, Q Li, S Tang, J Yu, Z

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Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2017, 327 pp. 39 - 50
Issue Date:: 2017-01-01

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Field	Value	Language
dc.contributor.author	Hu, Y	en_US
dc.contributor.author	Yang, Y	en_US
dc.contributor.author	Wang, XC	en_US
dc.contributor.author	Hao Ngo, H https://orcid.org/0000-0002-0296-2866	en_US
dc.contributor.author	Sun, Q	en_US
dc.contributor.author	Li, S	en_US
dc.contributor.author	Tang, J	en_US
dc.contributor.author	Yu, Z	en_US
dc.date.available	2020-05-25T19:28:20Z
dc.date.issued	2017-01-01	en_US
dc.identifier.citation	Chemical Engineering Journal, 2017, 327 pp. 39 - 50	en_US
dc.identifier.issn	1385-8947	en_US
dc.identifier.uri	http://hdl.handle.net/10453/114060
dc.description.abstract	© 2017 Elsevier B.V. A powdered activated carbon-dynamic membrane bioreactor (PAC-DMBR) was developed and used to treat domestic wastewater by dosing with 3 g/L PAC. The experimental results were compared with those of a control DMBR to investigate the filtration performance and various properties of the dynamic membrane (DM) layer. One flat-sheet DM module made of nylon mesh (pore size 75 μm) was used for effluent production at a high stable flux (50–100 L/m2 h) under a 10 cm water head by gravity flow, resulting in continuous operation cycles of 60–120 h. During the operation period, the PAC-DMBR showed enhanced removal efficiency of pollutants, higher stable membrane flux (10 L/m2 h more), lower filtration resistance (6.0–8.0 × 1010 m−1), quicker formation of the DM layer (within 5 min), and better DM layer regeneration after air backwashing. The DM layer in the PAC-DMBR showed a more porous and incompressible structure, because less extracellular polymeric substance and a portion of the biological PAC were incorporated into the DM layer formed as verified by the analytical results. Using high-throughput pyrosequencing technology, it was revealed that at the genus level the diversity of bacterial communities increased from 18 to 23 genera, while several genera that were favored in the PAC-assisted environment or were responsible for degrading complex organics were enriched. Moreover, the abundance of phylum Proteobacteria, which served as pioneer surface colonizers, was reduced in the PAC-DMBR. It was concluded that PAC addition could modify various aspects of the activated sludge and the DM layer properties, which affected the filtration behavior of the DM layer in the PAC-DMBR.	en_US
dc.relation.ispartof	Chemical Engineering Journal	en_US
dc.relation.isbasedon	10.1016/j.cej.2017.06.072	en_US
dc.subject.classification	Chemical Engineering	en_US
dc.title	Effects of powdered activated carbon addition on filtration performance and dynamic membrane layer properties in a hybrid DMBR process	en_US
dc.type	Journal Article
utslib.citation.volume	327	en_US
utslib.for	0904 Chemical Engineering	en_US
utslib.for	0905 Civil Engineering	en_US
utslib.for	0907 Environmental 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	open_access
pubs.publication-status	Published	en_US
pubs.volume	327	en_US

Abstract:

© 2017 Elsevier B.V. A powdered activated carbon-dynamic membrane bioreactor (PAC-DMBR) was developed and used to treat domestic wastewater by dosing with 3 g/L PAC. The experimental results were compared with those of a control DMBR to investigate the filtration performance and various properties of the dynamic membrane (DM) layer. One flat-sheet DM module made of nylon mesh (pore size 75 μm) was used for effluent production at a high stable flux (50–100 L/m2 h) under a 10 cm water head by gravity flow, resulting in continuous operation cycles of 60–120 h. During the operation period, the PAC-DMBR showed enhanced removal efficiency of pollutants, higher stable membrane flux (10 L/m2 h more), lower filtration resistance (6.0–8.0 × 1010 m−1), quicker formation of the DM layer (within 5 min), and better DM layer regeneration after air backwashing. The DM layer in the PAC-DMBR showed a more porous and incompressible structure, because less extracellular polymeric substance and a portion of the biological PAC were incorporated into the DM layer formed as verified by the analytical results. Using high-throughput pyrosequencing technology, it was revealed that at the genus level the diversity of bacterial communities increased from 18 to 23 genera, while several genera that were favored in the PAC-assisted environment or were responsible for degrading complex organics were enriched. Moreover, the abundance of phylum Proteobacteria, which served as pioneer surface colonizers, was reduced in the PAC-DMBR. It was concluded that PAC addition could modify various aspects of the activated sludge and the DM layer properties, which affected the filtration behavior of the DM layer in the PAC-DMBR.

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http://hdl.handle.net/10453/114060