Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impacts
This research examines the performance of two commercially available point-of-use (POU) microfiltration membrane filters (MF) under hydrated (wet) versus a multi-day dry period (dehydrated). Filter performance is monitored in terms of water quality and flowrate, as well as flowrate recovery followin...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IWA Publishing
2023-08-01
|
| Series: | Journal of Water, Sanitation and Hygiene for Development |
| Subjects: | |
| Online Access: | http://washdev.iwaponline.com/content/13/8/540 |
| _version_ | 1797689397175386112 |
|---|---|
| author | Andrea Ninabanda Ocampo Brett Holden Onita D. Basu |
| author_facet | Andrea Ninabanda Ocampo Brett Holden Onita D. Basu |
| author_sort | Andrea Ninabanda Ocampo |
| collection | DOAJ |
| description | This research examines the performance of two commercially available point-of-use (POU) microfiltration membrane filters (MF) under hydrated (wet) versus a multi-day dry period (dehydrated). Filter performance is monitored in terms of water quality and flowrate, as well as flowrate recovery following different cleaning regimes. The cleaning methods tested were backwashing with filtrate at room temperature, filtrate heated to 45 °C, filtrate at 45 °C with gentle shaking, and a vinegar solution (5% acetic acid). The selected cleaning methods reflect easily accessible cleaning methods with a goal to assess their impacts on flowrate recovery under both wet and dry conditions. After initial testing, hydrated MF flowrate varied between 197 ± 22 mL/min and backwashing with filtrate at room temperature was sufficient to maintain the membrane flowrate, while any of the other methods initially improved the system flowrate. In experiments where the filters were subject to a 5-day dry condition MF flowrates dropped to 65 ± 35 mL/min and filtrate at room temperature did not recover the flowrate sufficiently, however heated filtrate (45 °C) with/without gentle shaking was effective at recovering the MF for use. Water quality remained similar throughout the study, and 0 CFU/mL of E. coli were found in filtrate samples.
HIGHLIGHTS
This research provides a side-by-side comparison of POU membrane filters when maintained under wet versus dry conditions.;
Heated filtrate was found to positively improve membrane filter performance after fouling under all conditions.;
Overnight soaking of a dried membrane did not adequately recover membrane filter performance.;
Complete turbidity removal was observed under repeated wet and dry conditions.; |
| first_indexed | 2024-03-12T01:45:08Z |
| format | Article |
| id | doaj.art-1f5dfba15b78465ab4d13cf6bcd68978 |
| institution | Directory Open Access Journal |
| issn | 2043-9083 2408-9362 |
| language | English |
| last_indexed | 2024-03-12T01:45:08Z |
| publishDate | 2023-08-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Journal of Water, Sanitation and Hygiene for Development |
| spelling | doaj.art-1f5dfba15b78465ab4d13cf6bcd689782023-09-09T08:21:21ZengIWA PublishingJournal of Water, Sanitation and Hygiene for Development2043-90832408-93622023-08-0113854055010.2166/washdev.2023.249249Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impactsAndrea Ninabanda Ocampo0Brett Holden1Onita D. Basu2 Department of Civil and Environmental Engineering, Carleton University, Ottawa, ON K1S-3B4, Canada Department of Civil and Environmental Engineering, Carleton University, Ottawa, ON K1S-3B4, Canada Department of Civil and Environmental Engineering, Carleton University, Ottawa, ON K1S-3B4, Canada This research examines the performance of two commercially available point-of-use (POU) microfiltration membrane filters (MF) under hydrated (wet) versus a multi-day dry period (dehydrated). Filter performance is monitored in terms of water quality and flowrate, as well as flowrate recovery following different cleaning regimes. The cleaning methods tested were backwashing with filtrate at room temperature, filtrate heated to 45 °C, filtrate at 45 °C with gentle shaking, and a vinegar solution (5% acetic acid). The selected cleaning methods reflect easily accessible cleaning methods with a goal to assess their impacts on flowrate recovery under both wet and dry conditions. After initial testing, hydrated MF flowrate varied between 197 ± 22 mL/min and backwashing with filtrate at room temperature was sufficient to maintain the membrane flowrate, while any of the other methods initially improved the system flowrate. In experiments where the filters were subject to a 5-day dry condition MF flowrates dropped to 65 ± 35 mL/min and filtrate at room temperature did not recover the flowrate sufficiently, however heated filtrate (45 °C) with/without gentle shaking was effective at recovering the MF for use. Water quality remained similar throughout the study, and 0 CFU/mL of E. coli were found in filtrate samples. HIGHLIGHTS This research provides a side-by-side comparison of POU membrane filters when maintained under wet versus dry conditions.; Heated filtrate was found to positively improve membrane filter performance after fouling under all conditions.; Overnight soaking of a dried membrane did not adequately recover membrane filter performance.; Complete turbidity removal was observed under repeated wet and dry conditions.;http://washdev.iwaponline.com/content/13/8/540backwashinghollow-fibermembranemicrofiltrationpoint-of-use |
| spellingShingle | Andrea Ninabanda Ocampo Brett Holden Onita D. Basu Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impacts Journal of Water, Sanitation and Hygiene for Development backwashing hollow-fiber membrane microfiltration point-of-use |
| title | Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impacts |
| title_full | Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impacts |
| title_fullStr | Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impacts |
| title_full_unstemmed | Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impacts |
| title_short | Impacts of hydration and dehydration on microfiltration point-of-use filters: performance and cleaning impacts |
| title_sort | impacts of hydration and dehydration on microfiltration point of use filters performance and cleaning impacts |
| topic | backwashing hollow-fiber membrane microfiltration point-of-use |
| url | http://washdev.iwaponline.com/content/13/8/540 |
| work_keys_str_mv | AT andreaninabandaocampo impactsofhydrationanddehydrationonmicrofiltrationpointofusefiltersperformanceandcleaningimpacts AT brettholden impactsofhydrationanddehydrationonmicrofiltrationpointofusefiltersperformanceandcleaningimpacts AT onitadbasu impactsofhydrationanddehydrationonmicrofiltrationpointofusefiltersperformanceandcleaningimpacts |