Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment
The combination of conventional and advanced water treatment is now widely used in drinking water treatment. However, membrane fouling is still the main obstacle to extend its application. In this study, the impact of the combination of coagulation and ultrafiltration (UF) membrane rotation on both...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Membranes |
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| Online Access: | https://www.mdpi.com/2077-0375/11/8/643 |
| _version_ | 1827684825976274944 |
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| author | Hongjian Yu Weipeng Huang Huachen Liu Tian Li Nianping Chi Huaqiang Chu Bingzhi Dong |
| author_facet | Hongjian Yu Weipeng Huang Huachen Liu Tian Li Nianping Chi Huaqiang Chu Bingzhi Dong |
| author_sort | Hongjian Yu |
| collection | DOAJ |
| description | The combination of conventional and advanced water treatment is now widely used in drinking water treatment. However, membrane fouling is still the main obstacle to extend its application. In this study, the impact of the combination of coagulation and ultrafiltration (UF) membrane rotation on both fouling control and organic removal of macro (sodium alginate, SA) and micro organic matters (tannic acid, TA) was studied comprehensively to evaluate its applicability in drinking water treatment. The results indicated that membrane rotation could generate shear stress and vortex, thus effectively reducing membrane fouling of both SA and TA solutions, especially for macro SA organics. With additional coagulation, the membrane fouling could be further reduced through the aggregation of mediate and macro organic substances into flocs and elimination by membrane retention. For example, with the membrane rotation speed of 60 r/min, the permeate flux increased by 90% and the organic removal by 35% in SA solution, with 40 mg/L coagulant dosage, with an additional 70% increase of flux and 5% increment of organic removal to 80% obtained. However, too much shear stress could intensify the potential of fiber breakage at the potting, destroying the flocs and resulting in the reduction of permeate flux and deterioration of effluent quality. Finally, the combination of coagulation and membrane rotation would lead to the shaking of the cake layer, which is beneficial for fouling mitigation and prolongation of membrane filtration lifetime. This study provides useful information on applying the combined process of conventional coagulation and the hydrodynamic shear force for drinking water treatment, which can be further explored in the future. |
| first_indexed | 2024-03-10T08:36:36Z |
| format | Article |
| id | doaj.art-ebc8aec8386744cb996ab3693201e8e1 |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-10T08:36:36Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-ebc8aec8386744cb996ab3693201e8e12023-11-22T08:38:40ZengMDPI AGMembranes2077-03752021-08-0111864310.3390/membranes11080643Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water TreatmentHongjian Yu0Weipeng Huang1Huachen Liu2Tian Li3Nianping Chi4Huaqiang Chu5Bingzhi Dong6College of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaCollege of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaCollege of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaCollege of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaSchool of Municipal and Geomatics Engineering, Hunan City University, Yiyang 413000, ChinaCollege of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaCollege of Environmental Science and Engineering, Tongji University, Shanghai 200092, ChinaThe combination of conventional and advanced water treatment is now widely used in drinking water treatment. However, membrane fouling is still the main obstacle to extend its application. In this study, the impact of the combination of coagulation and ultrafiltration (UF) membrane rotation on both fouling control and organic removal of macro (sodium alginate, SA) and micro organic matters (tannic acid, TA) was studied comprehensively to evaluate its applicability in drinking water treatment. The results indicated that membrane rotation could generate shear stress and vortex, thus effectively reducing membrane fouling of both SA and TA solutions, especially for macro SA organics. With additional coagulation, the membrane fouling could be further reduced through the aggregation of mediate and macro organic substances into flocs and elimination by membrane retention. For example, with the membrane rotation speed of 60 r/min, the permeate flux increased by 90% and the organic removal by 35% in SA solution, with 40 mg/L coagulant dosage, with an additional 70% increase of flux and 5% increment of organic removal to 80% obtained. However, too much shear stress could intensify the potential of fiber breakage at the potting, destroying the flocs and resulting in the reduction of permeate flux and deterioration of effluent quality. Finally, the combination of coagulation and membrane rotation would lead to the shaking of the cake layer, which is beneficial for fouling mitigation and prolongation of membrane filtration lifetime. This study provides useful information on applying the combined process of conventional coagulation and the hydrodynamic shear force for drinking water treatment, which can be further explored in the future.https://www.mdpi.com/2077-0375/11/8/643membrane rotationcoagulationUFdissolved organic mattermembrane fouling controlhydrodynamic shear stress |
| spellingShingle | Hongjian Yu Weipeng Huang Huachen Liu Tian Li Nianping Chi Huaqiang Chu Bingzhi Dong Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment Membranes membrane rotation coagulation UF dissolved organic matter membrane fouling control hydrodynamic shear stress |
| title | Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment |
| title_full | Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment |
| title_fullStr | Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment |
| title_full_unstemmed | Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment |
| title_short | Application of Coagulation–Membrane Rotation to Improve Ultrafiltration Performance in Drinking Water Treatment |
| title_sort | application of coagulation membrane rotation to improve ultrafiltration performance in drinking water treatment |
| topic | membrane rotation coagulation UF dissolved organic matter membrane fouling control hydrodynamic shear stress |
| url | https://www.mdpi.com/2077-0375/11/8/643 |
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