Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic Filtration
Current treatment methods for desulfurization wastewater in the ship exhaust gas cleaning (EGC) system face several problems, including process complexity, unstable performance, large spatial requirements, and high energy consumption. This study investigates rotating dynamic filtration (RDF) as an e...
Saved in:
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2025-07-01
|
| Series: | Membranes |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-0375/15/7/214 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849246617285165056 |
|---|---|
| author | Shiyong Wang Juan Wu Yanlin Wu Wenbo Dong |
| author_facet | Shiyong Wang Juan Wu Yanlin Wu Wenbo Dong |
| author_sort | Shiyong Wang |
| collection | DOAJ |
| description | Current treatment methods for desulfurization wastewater in the ship exhaust gas cleaning (EGC) system face several problems, including process complexity, unstable performance, large spatial requirements, and high energy consumption. This study investigates rotating dynamic filtration (RDF) as an efficient treatment approach through experimental testing, theoretical analysis, and pilot-scale validation. Flux increases with temperature and pressure but decreases with feed concentration, remaining unaffected by circulation flow. For a small membrane (152 mm), flux consistently increases with rotational speed across all pressures. For a large membrane (374 mm), flux increases with rotational speed at 300 kPa but firstly increases and then decreases at 100 kPa. Filtrate turbidity in all experiments complies with regulatory standards. Due to the unique hydrodynamic characteristics of RDF, back pressure reduces the effective transmembrane pressure, whereas shear force mitigates concentration polarization and cake layer formation. Separation performance is governed by the balance between these two forces. The specific energy consumption of RDF is only 10–30% that of cross-flow filtration (CFF). Under optimized pilot-scale conditions, the wastewater was concentrated 30-fold, with filtrate turbidity consistently below 2 NTU, outperforming CFF. Moreover, continuous operation proves more suitable for marine environments. |
| format | Article |
| id | doaj-art-2d1cc9e779144fee906f9b8989caa801 |
| institution | Kabale University |
| issn | 2077-0375 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj-art-2d1cc9e779144fee906f9b8989caa8012025-08-20T03:58:26ZengMDPI AGMembranes2077-03752025-07-0115721410.3390/membranes15070214Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic FiltrationShiyong Wang0Juan Wu1Yanlin Wu2Wenbo Dong3Department of Environmental Science and Engineering, Fudan University, Shanghai 200433, ChinaShanghai Research Institute of Chemical Industry Co., Ltd., Shanghai 200062, ChinaSchool of Resources and Environmental Engineering, Shanghai Polytechnic University, Shanghai 201209, ChinaDepartment of Environmental Science and Engineering, Fudan University, Shanghai 200433, ChinaCurrent treatment methods for desulfurization wastewater in the ship exhaust gas cleaning (EGC) system face several problems, including process complexity, unstable performance, large spatial requirements, and high energy consumption. This study investigates rotating dynamic filtration (RDF) as an efficient treatment approach through experimental testing, theoretical analysis, and pilot-scale validation. Flux increases with temperature and pressure but decreases with feed concentration, remaining unaffected by circulation flow. For a small membrane (152 mm), flux consistently increases with rotational speed across all pressures. For a large membrane (374 mm), flux increases with rotational speed at 300 kPa but firstly increases and then decreases at 100 kPa. Filtrate turbidity in all experiments complies with regulatory standards. Due to the unique hydrodynamic characteristics of RDF, back pressure reduces the effective transmembrane pressure, whereas shear force mitigates concentration polarization and cake layer formation. Separation performance is governed by the balance between these two forces. The specific energy consumption of RDF is only 10–30% that of cross-flow filtration (CFF). Under optimized pilot-scale conditions, the wastewater was concentrated 30-fold, with filtrate turbidity consistently below 2 NTU, outperforming CFF. Moreover, continuous operation proves more suitable for marine environments.https://www.mdpi.com/2077-0375/15/7/214EGC desulfurization wastewaterrotating dynamic filtrationfluxturbidityshear forceback pressure |
| spellingShingle | Shiyong Wang Juan Wu Yanlin Wu Wenbo Dong Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic Filtration Membranes EGC desulfurization wastewater rotating dynamic filtration flux turbidity shear force back pressure |
| title | Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic Filtration |
| title_full | Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic Filtration |
| title_fullStr | Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic Filtration |
| title_full_unstemmed | Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic Filtration |
| title_short | Study on Separation of Desulfurization Wastewater in Ship Exhaust Gas Cleaning System with Rotating Dynamic Filtration |
| title_sort | study on separation of desulfurization wastewater in ship exhaust gas cleaning system with rotating dynamic filtration |
| topic | EGC desulfurization wastewater rotating dynamic filtration flux turbidity shear force back pressure |
| url | https://www.mdpi.com/2077-0375/15/7/214 |
| work_keys_str_mv | AT shiyongwang studyonseparationofdesulfurizationwastewaterinshipexhaustgascleaningsystemwithrotatingdynamicfiltration AT juanwu studyonseparationofdesulfurizationwastewaterinshipexhaustgascleaningsystemwithrotatingdynamicfiltration AT yanlinwu studyonseparationofdesulfurizationwastewaterinshipexhaustgascleaningsystemwithrotatingdynamicfiltration AT wenbodong studyonseparationofdesulfurizationwastewaterinshipexhaustgascleaningsystemwithrotatingdynamicfiltration |