Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River Water
Drinking water treatment (DWT) using low–pressure membranes (LPM) has become increasingly popular due to their many reported advantages compared to conventional technologies. Productivity decline due to fouling has prevented LPMs from becoming the technology of choice in DWT, however, coagulation pr...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-10-01
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| Series: | Membranes |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2077-0375/12/11/1028 |
| _version_ | 1827646144870612992 |
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| author | Joseph D. Ladouceur Roberto M. Narbaitz |
| author_facet | Joseph D. Ladouceur Roberto M. Narbaitz |
| author_sort | Joseph D. Ladouceur |
| collection | DOAJ |
| description | Drinking water treatment (DWT) using low–pressure membranes (LPM) has become increasingly popular due to their many reported advantages compared to conventional technologies. Productivity decline due to fouling has prevented LPMs from becoming the technology of choice in DWT, however, coagulation pretreatment either with or without particle separation mitigates fouling phenomena. The effectiveness of coagulation/flocculation/sedimentation (CF–S), coagulation/flocculation/dissolved air flotation (CF–DAF), and inline coagulation (CF–IN) as technologies for pretreatment of feed water has rarely been investigated using the same water source. In this study, CF–S, CF–DAF, and CF–IN are directly compared as pretreatment of a tubular multi–channeled ultrafiltration (UF) membrane using the same highly colored river water. Three–day long filtration tests were performed using an automated bench–scale filtration apparatus with an inside–out configuration. Although CF–DAF had the greatest removal of dissolved organic matter (DOM) and hydrophobic organics, CF–S pretreatment resulted in a similar level of total fouling. Compared to CF–DAF and CF–S, CF–IN pretreatment resulted in lower fouling. The hydraulic and chemical reversibility of CF–IN fouling was seen to be strongly influenced by the feed water zeta potential, suggesting the importance of floc electrostatic and morphological characteristics on inline coagulation performance. |
| first_indexed | 2024-03-09T18:51:55Z |
| format | Article |
| id | doaj.art-72711945ad8f4b75b612be2594a1324a |
| institution | Directory Open Access Journal |
| issn | 2077-0375 |
| language | English |
| last_indexed | 2024-03-09T18:51:55Z |
| publishDate | 2022-10-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Membranes |
| spelling | doaj.art-72711945ad8f4b75b612be2594a1324a2023-11-24T05:47:57ZengMDPI AGMembranes2077-03752022-10-011211102810.3390/membranes12111028Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River WaterJoseph D. Ladouceur0Roberto M. Narbaitz1Department of Civil Engineering, University of Ottawa, Ottawa, ON K1N 6N5, CanadaDepartment of Civil Engineering, University of Ottawa, Ottawa, ON K1N 6N5, CanadaDrinking water treatment (DWT) using low–pressure membranes (LPM) has become increasingly popular due to their many reported advantages compared to conventional technologies. Productivity decline due to fouling has prevented LPMs from becoming the technology of choice in DWT, however, coagulation pretreatment either with or without particle separation mitigates fouling phenomena. The effectiveness of coagulation/flocculation/sedimentation (CF–S), coagulation/flocculation/dissolved air flotation (CF–DAF), and inline coagulation (CF–IN) as technologies for pretreatment of feed water has rarely been investigated using the same water source. In this study, CF–S, CF–DAF, and CF–IN are directly compared as pretreatment of a tubular multi–channeled ultrafiltration (UF) membrane using the same highly colored river water. Three–day long filtration tests were performed using an automated bench–scale filtration apparatus with an inside–out configuration. Although CF–DAF had the greatest removal of dissolved organic matter (DOM) and hydrophobic organics, CF–S pretreatment resulted in a similar level of total fouling. Compared to CF–DAF and CF–S, CF–IN pretreatment resulted in lower fouling. The hydraulic and chemical reversibility of CF–IN fouling was seen to be strongly influenced by the feed water zeta potential, suggesting the importance of floc electrostatic and morphological characteristics on inline coagulation performance.https://www.mdpi.com/2077-0375/12/11/1028membrane foulinginline coagulationultrafiltrationnatural organic matterdissolved air flotationcolored water |
| spellingShingle | Joseph D. Ladouceur Roberto M. Narbaitz Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River Water Membranes membrane fouling inline coagulation ultrafiltration natural organic matter dissolved air flotation colored water |
| title | Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River Water |
| title_full | Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River Water |
| title_fullStr | Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River Water |
| title_full_unstemmed | Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River Water |
| title_short | Reduced Low–Pressure Membrane Fouling by Inline Coagulation Pretreatment for a Colored River Water |
| title_sort | reduced low pressure membrane fouling by inline coagulation pretreatment for a colored river water |
| topic | membrane fouling inline coagulation ultrafiltration natural organic matter dissolved air flotation colored water |
| url | https://www.mdpi.com/2077-0375/12/11/1028 |
| work_keys_str_mv | AT josephdladouceur reducedlowpressuremembranefoulingbyinlinecoagulationpretreatmentforacoloredriverwater AT robertomnarbaitz reducedlowpressuremembranefoulingbyinlinecoagulationpretreatmentforacoloredriverwater |