1. 1. 2. 3. 4. 5. 6. 7. 8. © Crossflow Microfiltration Of Electrocoagulated Kaolin Suspension: Fouling Mechanism Al-Malack, MH; Bukhari, AA; Abuzaid, NS ELSEVIER SCIENCE BV, JOURNAL OF MEMBRANE SCIENCE; pp: 143-153; Vol: 243 King Fahd University of Petroleum & Minerals http://www.kfupm.edu.sa Summary The fouling mechanism of a woven fabric membrane, when treating kaolin suspension, was investigated with and without the use of a ferric coagulant that was produced using an electrochemical cell. The investigation was carried out at different kaolin concentrations and crossflow velocities (CFV). Without coagulation, the investigation of process performance showed that the flux decline with time was proceeding exponentially. The effect of CVF on the permeate flux was clear, particularly, when the crossflow velocity was increased to 2 m/s. The fouling mechanism investigation showed that membrane fouling proceeded in accordance with the standard law of filtration, which is attributed to the infiltration of colloidal particles into the pores of the membrane. With coagulation, membrane fouling was found to proceed according to the classical cake filtration model, in some of the runs. This was attributed to the formation of agglomerated particle on top of the primary membrane. (C) 2004 Elsevier B.V. All rights reserved. References: AKAY G, 1998, WATER RES, V32, P717 ALMALACK MH, 1996, J MEMBRANE SCI, V112, P287 ANDERSON GK, 1986, P 4 WORLD FILTR C OS BENAIM R, 1988, WATER POLLUTION CONT BHAVE RR, 1988, AICHE S SER, V84, P19 CABASSUD C, MICROFILTRATION TANG CHAPMAN H, 2002, DESALINATION, V146, P367 CHEN XM, 2000, SEP PURIF TECHNOL, V19, P65 Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa

2. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. © DALRYMPLE CW, 1997, P 1997 AIR WAST MAN FORMAN SM, 1990, J MEMBRANE SCI, V48, P263 GEKAS V, 1990, DESALINATION, V77, P195 GRACE HP, 1956, AICHE J, V2, P307 HAZLETT JD, 1987, AICHE S SER, V272, P101 HERMIA J, 1982, T I CHEM ENG-LOND, V60, P183 JIANG JQ, 2002, WATER RES, V36, P406 KIM TH, 2002, DESALINATION, V150, P165 KOBYA M, 2003, J HAZARD MATER, V100, P163, DOI 10.1016/S0304-3894(03)00102-X KOENDERS MA, 1996, CHEM ENG SCI, V51, P3897 KOENDERS MA, 1997, AICHE J, V43, P946 LARUE O, 2002, SEP PURIF TECHNOL, V31, P177 MATTESON MJ, 1995, COLLOID SURFACE A, V104, P101 MILISIC V, 1986, FILTR SEPARAT, V23, P347 MULDER M, 1991, BASIC PRINCIPLES MEM MURKES J, 1988, CROSSFLOW FILTRATION NGUYEN MT, 2002, DESALINATION, V147, P37 OMELIA CR, 1972, PHYSICOCHEMICAL PROC PEUCHOT MM, 1992, J MEMBRANE SCI, V68, P241 POUET MF, 1991, INORGANIC MEMBRANES, P549 POUET MF, 1994, FILTR SEPARAT, P269 RIPPERGER S, 1988, CHEM ENG TECHNOL, V11, P17 RIPPERGER S, 1989, WATER WASTEWATER SLU TANAKA T, 1997, SEPAR SCI TECHNOL, V32, P1885 TANNY GB, 1978, SEPAR PURIF METHOD, V7, P183 TANNY GB, 1979, J PARENT DRUG ASS, V33, P40 VANDENBERG GB, 1990, DESALINATION, V77, P101 VISVANATHAN C, 1989, J MEMBRANE SCI, V45, P3 VYAS HK, 2000, INT DAIRY J, V10, P855 VYAS HK, 2002, INT DAIRY J, V12, P473 WAKEMAN RJ, 1991, DESALINATION WATER R, P55 For pre-prints please write to: mhmalack@kfupm.edu.sa Copyright: King Fahd University of Petroleum & Minerals; http://www.kfupm.edu.sa