Dead-end filtration of natural organic matter: experimental evidence of critical conditions

• Published in: Desalination Vol. 175; no. 1; pp. 29 - 36
• Main Authors: Bessiere, Y., Bacchin, P., Jefferson, B.
• Format: Journal Article Conference Proceeding
• Language: English
• Published: Amsterdam Elsevier B.V 2005; Elsevier
• Subjects: Applied sciences; Chemical and Process Engineering; Chemical engineering; Condensed Matter; Critical filtered volume; Critical flux; Engineering Sciences; Exact sciences and technology; Fouling; Irreversibility; Membrane separation (reverse osmosis, dialysis...); NOM; Physics; Pollution; Soft Condensed Matter; Critical flux; Critical filtered volume; Irreversibility; Fouling; NOM; Dead-end filtration; Organic matter; Cleaning; Optimization; Operating conditions; Membrane separation; Critical conditions; Ultrafiltration
• ISSN: 0011-9164; 1873-4464
• DOI: 10.1016/j.desal.2004.09.021

The development of membrane technology has reached a state whereby operational optimisation is becoming the major issue to both researchers and industrial operators. A key focus is towards sustainable operation where fouling is limited and cleaning is greatly reduced. The paper presents an example of such an approach for the filtration of natural organic matter (NOM) in a dead-end ultrafiltration cell. Sustainable operation has been assessed in relation to the application of a cessation period followed by a gentle rinse. The work demonstrates the existence of a critical filtered volume below which the mass accumulated at the membrane's surface is reversible and above which significant fouling occurs. Further, appropriate selection of operating conditions (filtered volume and applied pressure) makes it possible to avoid the formation of an irreversible fouling layer.