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Removal of ametryn using membrane bioreactor process and its influence on critical flux

Navaratna, Dimuth and Jegatheesan, Veeriah 2010, Removal of ametryn using membrane bioreactor process and its influence on critical flux, in ICSBE 2010 : Enhancing disaster prevention and mitigation : Proceedings of the International Conference on Sustainable Built Environments, [University of Peradeniya], [Kandy, Sri Lanka], pp. 189-197.

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Title Removal of ametryn using membrane bioreactor process and its influence on critical flux
Author(s) Navaratna, Dimuth
Jegatheesan, Veeriah
Conference name International Conference on Sustainable Built Environments (2010 : Kandy, Sri Lanka)
Conference location Kandy, Sri Lanka
Conference dates 12-14 Dec. 2010
Title of proceedings ICSBE 2010 : Enhancing disaster prevention and mitigation : Proceedings of the International Conference on Sustainable Built Environments
Editor(s) [Unknown]
Publication date 2010
Conference series International Conference on Sustainable Built Environments
Start page 189
End page 197
Total pages 9
Publisher [University of Peradeniya]
Place of publication [Kandy, Sri Lanka]
Keyword(s) membrane bioreactors (MBRs)
critical flux
mixed liquor suspended solids (MLSS)
extracellular polymeric substances (EPS)
ametryn
Summary Compared to the Conventional Activated Sludge Process (ASP), Membrane Bioreactors (MBRs) have proven their superior performance in wastewater treatment and reuse during the past two decades. Further, MBRs have wide array of applications such as the removal of nutrients, toxic and persistent organic pollutants (POPs), which are impossible or difficult to remove using ASP. However, fouling of membrane is one of the main drawbacks to the widespread application of MBR technology and Extra-cellular Polymeric Substances (EPS) secreted by microbes are considered as one of the major foulants, which will reduce the flux (L/m2/h) through the membrane. Critical flux is defined as the flux above which membrane cake or gel layer formation due to deposition of EPS and other colloids on the membrane surface occurs. Thus, one of the operating strategies to control the fouling of MBRs is to operate those systems below the critical flux (at Sub-Critical flux). This paper discusses the critical flux results, which were obtained from short-term common flux step method, for a lab-scale MBR system treating Ametryn. This study compares the critical flux values that were obtained by operating the MBR system (consisting of a submerged Hollow-Fibre membrane with pore size of 0.4μm and effective area of 0.2m2) at different operating conditions and mixed liquor properties. This study revealed that the critical flux values found after the introduction of Ametryn were significantly lower than those of obtained before adding Ametryn to the synthetic wastewater. It was also revealed that the production of carbohydrates (in SMP) is greater than proteins, subsequent to the introduction of Ametryn and this may have influenced the membrane to foul more. It was also observed that a significant removal (40-60%) of Ametryn from this MBR during the critical flux determination experiments with 40 minutes flux-step duration.
Language eng
Field of Research 099999 Engineering not elsewhere classified
Socio Economic Objective 970109 Expanding Knowledge in Engineering
HERDC Research category E1.1 Full written paper - refereed
ERA Research output type E Conference publication
Persistent URL http://hdl.handle.net/10536/DRO/DU:30039602

Document type: Conference Paper
Collection: School of Engineering
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