Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supply
In this work, hollow fibre ultrafiltration (UF) membrane operating under gravitational force were used to treat Escherichia coli bloomed water as well as contaminated surface water. The biofouling propensity of the UF membrane was investigated. The results showed that after the single filtration usi...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IWA Publishing
2022-05-01
|
| Series: | Water Supply |
| Subjects: | |
| Online Access: | http://ws.iwaponline.com/content/22/5/5618 |
| _version_ | 1811314882135457792 |
|---|---|
| author | Nur Ir Imani Ishak Ooi Boon Seng Derek Chan Juinn Chieh Aaron Koe Zhen Yao Chang Ying Shi Ng Qi Hwa |
| author_facet | Nur Ir Imani Ishak Ooi Boon Seng Derek Chan Juinn Chieh Aaron Koe Zhen Yao Chang Ying Shi Ng Qi Hwa |
| author_sort | Nur Ir Imani Ishak |
| collection | DOAJ |
| description | In this work, hollow fibre ultrafiltration (UF) membrane operating under gravitational force were used to treat Escherichia coli bloomed water as well as contaminated surface water. The biofouling propensity of the UF membrane was investigated. The results showed that after the single filtration using the gravitational-driven UF unit, E. coli cells were accumulated on the membrane surface and gave fair rejection of 86.35–90.22% for initial E. coli cells concentrations of 5,000 and 10,000 MPN/ 100 mL, respectively. On the other hand, the double GDU membrane unit (filtration in series) could enhance E. coli removal up to 97.70–99.03% based on initial E. coli cell of 5,000 and 10,000 MPN/100 mL, respectively. For river water as feed, it was found that the permeate is free of pathogenic cells. No significant E. coli cells were found on the membrane surface of second filtration unit. Although there is ten-fold flux decrement by using a double filtration unit, the module is able to polish the contaminated water to potable water quality. The membrane could be cleaned using the simple backwash and the flux could be recovered up to 94%. In overall, this study has demonstrated the potential of using gravitational-driven UF to remove pathogens from contaminated river water. HIGHLIGHTS
Modular or flexible filtration could be set up depending on the flux and permeate quality.;
Double filtration module of gravitational deiven ultrafiltration could effectively remove pathogenic bacteria.;
E. coli cells accumulated only on the membrane surface of the first filtration module.;
Dissolved salts are able to penetrate the membrane and crystallize on membrane surface.;
No pathogenic cells were found in the river water permeate.; |
| first_indexed | 2024-04-13T11:20:20Z |
| format | Article |
| id | doaj.art-d3bb1d8585904db4a137459e363aa9fb |
| institution | Directory Open Access Journal |
| issn | 1606-9749 1607-0798 |
| language | English |
| last_indexed | 2024-04-13T11:20:20Z |
| publishDate | 2022-05-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Water Supply |
| spelling | doaj.art-d3bb1d8585904db4a137459e363aa9fb2022-12-22T02:48:50ZengIWA PublishingWater Supply1606-97491607-07982022-05-012255618563710.2166/ws.2022.164164Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supplyNur Ir Imani Ishak0Ooi Boon Seng1Derek Chan Juinn Chieh2Aaron Koe Zhen Yao3Chang Ying Shi4Ng Qi Hwa5 School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal Penang, Malaysia School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal Penang, Malaysia School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal Penang, Malaysia School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal Penang, Malaysia School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal Penang, Malaysia Faculty of Chemical Engineering Technology, Universiti Malaysia Perlis (UniMAP), Perlis, Malaysia In this work, hollow fibre ultrafiltration (UF) membrane operating under gravitational force were used to treat Escherichia coli bloomed water as well as contaminated surface water. The biofouling propensity of the UF membrane was investigated. The results showed that after the single filtration using the gravitational-driven UF unit, E. coli cells were accumulated on the membrane surface and gave fair rejection of 86.35–90.22% for initial E. coli cells concentrations of 5,000 and 10,000 MPN/ 100 mL, respectively. On the other hand, the double GDU membrane unit (filtration in series) could enhance E. coli removal up to 97.70–99.03% based on initial E. coli cell of 5,000 and 10,000 MPN/100 mL, respectively. For river water as feed, it was found that the permeate is free of pathogenic cells. No significant E. coli cells were found on the membrane surface of second filtration unit. Although there is ten-fold flux decrement by using a double filtration unit, the module is able to polish the contaminated water to potable water quality. The membrane could be cleaned using the simple backwash and the flux could be recovered up to 94%. In overall, this study has demonstrated the potential of using gravitational-driven UF to remove pathogens from contaminated river water. HIGHLIGHTS Modular or flexible filtration could be set up depending on the flux and permeate quality.; Double filtration module of gravitational deiven ultrafiltration could effectively remove pathogenic bacteria.; E. coli cells accumulated only on the membrane surface of the first filtration module.; Dissolved salts are able to penetrate the membrane and crystallize on membrane surface.; No pathogenic cells were found in the river water permeate.;http://ws.iwaponline.com/content/22/5/5618biofoulinggravitational forcepathogensultrafiltration |
| spellingShingle | Nur Ir Imani Ishak Ooi Boon Seng Derek Chan Juinn Chieh Aaron Koe Zhen Yao Chang Ying Shi Ng Qi Hwa Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supply Water Supply biofouling gravitational force pathogens ultrafiltration |
| title | Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supply |
| title_full | Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supply |
| title_fullStr | Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supply |
| title_full_unstemmed | Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supply |
| title_short | Treatment of river water using modular gravity-driven ultrafiltration (GDU) for individual contingency water supply |
| title_sort | treatment of river water using modular gravity driven ultrafiltration gdu for individual contingency water supply |
| topic | biofouling gravitational force pathogens ultrafiltration |
| url | http://ws.iwaponline.com/content/22/5/5618 |
| work_keys_str_mv | AT nuririmaniishak treatmentofriverwaterusingmodulargravitydrivenultrafiltrationgduforindividualcontingencywatersupply AT ooiboonseng treatmentofriverwaterusingmodulargravitydrivenultrafiltrationgduforindividualcontingencywatersupply AT derekchanjuinnchieh treatmentofriverwaterusingmodulargravitydrivenultrafiltrationgduforindividualcontingencywatersupply AT aaronkoezhenyao treatmentofriverwaterusingmodulargravitydrivenultrafiltrationgduforindividualcontingencywatersupply AT changyingshi treatmentofriverwaterusingmodulargravitydrivenultrafiltrationgduforindividualcontingencywatersupply AT ngqihwa treatmentofriverwaterusingmodulargravitydrivenultrafiltrationgduforindividualcontingencywatersupply |