Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei
Natural field latex with about 30% dry rubber content (DRC) needs to be further concentrated to about 60% DRC for further downstream processing into a variety of products. A large volume of skim latex (consists of 6-8% DRC) is produced as byproduct during centrifugation of natural field latex. Me...
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| Format: | Thesis |
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2013
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| Online Access: | http://studentsrepo.um.edu.my/8613/ http://studentsrepo.um.edu.my/8613/6/HO_KAR_WEI_%2D_Fouling_Behavior_during_ultrafiltration_of_skim_latex.pdf |
| _version_ | 1848773705167011840 |
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| author | Ho, Kar Wei |
| author_facet | Ho, Kar Wei |
| author_sort | Ho, Kar Wei |
| building | UM Research Repository |
| collection | Online Access |
| description | Natural field latex with about 30% dry rubber content (DRC) needs to be further
concentrated to about 60% DRC for further downstream processing into a variety of
products. A large volume of skim latex (consists of 6-8% DRC) is produced as byproduct
during centrifugation of natural field latex. Membrane separation process can be
used to recover the skim rubber particles as well as the by-product serum from the skim
latex stream leading to zero discharge. Current practice requires a wastewater treatment
plant to treat the waste to meet the legal requirement before discharging to the
environment. As such a study has been initiated to gain an understanding of the fouling
behavior of skim latex in terms of permeate flux and fouling resistances during the
ultrafiltration of skim latex in order to increase membrane life as well as optimizing
cleaning procedure. A bench scale crossflow ultrafiltration unit using single channel
tubular ceramic membrane with pore size 0.05μm was used in this study. The effect of
operating conditions, i.e. crossflow velocity (1.3 cm/s to 4.6 cm/s) and transmembrane
pressure (0.3 bar to 1.0 bar) were investigated. The overall filtration performance
showed a similar trend, i.e. initial permeates fluxes start up high and then decreases
rapidly. Finally, permeate flux attained pseudo steady state where permeate flux was
almost constant at this stage. At crossflow velocity 4.6cm/s, initial permeate flux and
permeate flux at pseudo steady state decreased with the increase in transmembrane
pressure. At crossflow velocity 1.3 cm/s, permeate flux at pseudo steady state is reduced
by about 38% as transmembrane pressure increased from 0.6 bar to 1.0 bar. However,
permeate flux at pseudo steady state is increased drastically (263%) as transmembrane
pressure increased further to 1.3 bar. This behavior occurred due to the change in the
microstructure of fouled membrane as shown in scanning electron microscope images.
Keywords: Ultrafiltration; skim latex; ceramic membrane; fouling |
| first_indexed | 2025-11-14T13:46:39Z |
| format | Thesis |
| id | um-8613 |
| institution | University Malaya |
| institution_category | Local University |
| last_indexed | 2025-11-14T13:46:39Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | um-86132019-07-14T19:18:05Z Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei Ho, Kar Wei T Technology (General) TA Engineering (General). Civil engineering (General) Natural field latex with about 30% dry rubber content (DRC) needs to be further concentrated to about 60% DRC for further downstream processing into a variety of products. A large volume of skim latex (consists of 6-8% DRC) is produced as byproduct during centrifugation of natural field latex. Membrane separation process can be used to recover the skim rubber particles as well as the by-product serum from the skim latex stream leading to zero discharge. Current practice requires a wastewater treatment plant to treat the waste to meet the legal requirement before discharging to the environment. As such a study has been initiated to gain an understanding of the fouling behavior of skim latex in terms of permeate flux and fouling resistances during the ultrafiltration of skim latex in order to increase membrane life as well as optimizing cleaning procedure. A bench scale crossflow ultrafiltration unit using single channel tubular ceramic membrane with pore size 0.05μm was used in this study. The effect of operating conditions, i.e. crossflow velocity (1.3 cm/s to 4.6 cm/s) and transmembrane pressure (0.3 bar to 1.0 bar) were investigated. The overall filtration performance showed a similar trend, i.e. initial permeates fluxes start up high and then decreases rapidly. Finally, permeate flux attained pseudo steady state where permeate flux was almost constant at this stage. At crossflow velocity 4.6cm/s, initial permeate flux and permeate flux at pseudo steady state decreased with the increase in transmembrane pressure. At crossflow velocity 1.3 cm/s, permeate flux at pseudo steady state is reduced by about 38% as transmembrane pressure increased from 0.6 bar to 1.0 bar. However, permeate flux at pseudo steady state is increased drastically (263%) as transmembrane pressure increased further to 1.3 bar. This behavior occurred due to the change in the microstructure of fouled membrane as shown in scanning electron microscope images. Keywords: Ultrafiltration; skim latex; ceramic membrane; fouling 2013-06 Thesis NonPeerReviewed application/pdf http://studentsrepo.um.edu.my/8613/6/HO_KAR_WEI_%2D_Fouling_Behavior_during_ultrafiltration_of_skim_latex.pdf Ho, Kar Wei (2013) Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei. Masters thesis, University of Malaya. http://studentsrepo.um.edu.my/8613/ |
| spellingShingle | T Technology (General) TA Engineering (General). Civil engineering (General) Ho, Kar Wei Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei |
| title | Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei |
| title_full | Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei |
| title_fullStr | Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei |
| title_full_unstemmed | Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei |
| title_short | Fouling behaviour during ultrafiltration of skim latex / Ho Kar Wei |
| title_sort | fouling behaviour during ultrafiltration of skim latex / ho kar wei |
| topic | T Technology (General) TA Engineering (General). Civil engineering (General) |
| url | http://studentsrepo.um.edu.my/8613/ http://studentsrepo.um.edu.my/8613/6/HO_KAR_WEI_%2D_Fouling_Behavior_during_ultrafiltration_of_skim_latex.pdf |