Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning
In this study, two lava stone biocarrier facilitated gravity-driven membrane (GDM) reactors were operated at ~8 °C and ~22 °C in parallel for treating primary wastewater effluent. Although the biocarrier reactor at 8 °C displayed less efficient removals of biodegradable organics than that at 22 °C,...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2023
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| Online Access: | https://hdl.handle.net/10356/164187 |
| _version_ | 1811682480195895296 |
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| author | Hube, Selina Lee, Seonki Chong, Tzyy Haur Brynjólfsson, Sigurður Wu, Bing |
| author2 | School of Civil and Environmental Engineering |
| author_facet | School of Civil and Environmental Engineering Hube, Selina Lee, Seonki Chong, Tzyy Haur Brynjólfsson, Sigurður Wu, Bing |
| author_sort | Hube, Selina |
| collection | NTU |
| description | In this study, two lava stone biocarrier facilitated gravity-driven membrane (GDM) reactors were operated at ~8 °C and ~22 °C in parallel for treating primary wastewater effluent. Although the biocarrier reactor at 8 °C displayed less efficient removals of biodegradable organics than that at 22 °C, both GDM systems (without cleaning) showed comparable fouling resistance distribution patterns, accompanying with similar cake filtration constants and pore constriction constants by modelling simulation. Compared to the GDM at 8 °C, more foulants were accumulated on the GDM at 22 °C, but they presented similar soluble organics/inorganics contents and specific cake resistances. This indicated the cake layers at 22 °C may contain greater-sized foulants due to proliferation of both prokaryotes and eukaryotes, leading to a relatively less-porous nature. In the presence of periodic cleaning (at 50 °C), the cleaning effectiveness followed a sequence as ultrasonication-enhanced physical cleaning > two-phase flow cleaning > chemical-enhanced physical cleaning > physical cleaning, regardless of GDM operation temperature. However, significantly higher cake resistances were observed in the GDM system at 22 °C than those at 8 °C, because shear force tended to remove loosely-attached foulant layers and may compress the residual dense cake layer. The presence of periodic cleaning led to dissimilar dominant prokaryotic and eukaryotic communities in the cake layers as those without cleaning and in the lava stone biocarriers. Nevertheless, operation temperature did not influence GDM permeate quality, which met EU discharge standards. |
| first_indexed | 2024-10-01T03:57:30Z |
| format | Journal Article |
| id | ntu-10356/164187 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T03:57:30Z |
| publishDate | 2023 |
| record_format | dspace |
| spelling | ntu-10356/1641872023-01-09T03:20:42Z Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning Hube, Selina Lee, Seonki Chong, Tzyy Haur Brynjólfsson, Sigurður Wu, Bing School of Civil and Environmental Engineering Nanyang Environment and Water Research Institute Singapore Membrane Technology Centre Engineering::Environmental engineering Membrane Fouling Periodic Membrane Cleaning In this study, two lava stone biocarrier facilitated gravity-driven membrane (GDM) reactors were operated at ~8 °C and ~22 °C in parallel for treating primary wastewater effluent. Although the biocarrier reactor at 8 °C displayed less efficient removals of biodegradable organics than that at 22 °C, both GDM systems (without cleaning) showed comparable fouling resistance distribution patterns, accompanying with similar cake filtration constants and pore constriction constants by modelling simulation. Compared to the GDM at 8 °C, more foulants were accumulated on the GDM at 22 °C, but they presented similar soluble organics/inorganics contents and specific cake resistances. This indicated the cake layers at 22 °C may contain greater-sized foulants due to proliferation of both prokaryotes and eukaryotes, leading to a relatively less-porous nature. In the presence of periodic cleaning (at 50 °C), the cleaning effectiveness followed a sequence as ultrasonication-enhanced physical cleaning > two-phase flow cleaning > chemical-enhanced physical cleaning > physical cleaning, regardless of GDM operation temperature. However, significantly higher cake resistances were observed in the GDM system at 22 °C than those at 8 °C, because shear force tended to remove loosely-attached foulant layers and may compress the residual dense cake layer. The presence of periodic cleaning led to dissimilar dominant prokaryotic and eukaryotic communities in the cake layers as those without cleaning and in the lava stone biocarriers. Nevertheless, operation temperature did not influence GDM permeate quality, which met EU discharge standards. Economic Development Board (EDB) The University of Iceland is acknowledged for providing Research Fund to Bing Wu and providing PhD scholarship to Selina Hube. The Economic Development Board (EDB) of Singapore is acknowledged for funding the Singapore Membrane Technology Centre (SMTC), Nanyang Technological University. 2023-01-09T03:20:41Z 2023-01-09T03:20:41Z 2022 Journal Article Hube, S., Lee, S., Chong, T. H., Brynjólfsson, S. & Wu, B. (2022). Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning. Science of the Total Environment, 833, 155248-. https://dx.doi.org/10.1016/j.scitotenv.2022.155248 0048-9697 https://hdl.handle.net/10356/164187 10.1016/j.scitotenv.2022.155248 35427614 2-s2.0-85128970715 833 155248 en Science of the Total Environment © 2022 Elsevier B.V. All rights reserved. |
| spellingShingle | Engineering::Environmental engineering Membrane Fouling Periodic Membrane Cleaning Hube, Selina Lee, Seonki Chong, Tzyy Haur Brynjólfsson, Sigurður Wu, Bing Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning |
| title | Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning |
| title_full | Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning |
| title_fullStr | Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning |
| title_full_unstemmed | Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning |
| title_short | Biocarriers facilitated gravity-driven membrane filtration of domestic wastewater in cold climate: combined effect of temperature and periodic cleaning |
| title_sort | biocarriers facilitated gravity driven membrane filtration of domestic wastewater in cold climate combined effect of temperature and periodic cleaning |
| topic | Engineering::Environmental engineering Membrane Fouling Periodic Membrane Cleaning |
| url | https://hdl.handle.net/10356/164187 |
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