TITLE

Flux decline and membrane fouling in cross-flow microfiltration of oil-in-water emulsions

AUTHOR(S)
Abbasi, Mohsen; Sebzari, Mohammad Reza; Salahi, Abdolhamid; Abbasi, Saeid; Mohammadi, Toraj
PUB. DATE
April 2011
SOURCE
Desalination & Water Treatment;Apr2011, Vol. 28 Issue 1-3, p1
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
One of the major problems in pressure driven membrane processes is the reduction of the flux to far below the theoretical capacity of the membrane. The typical variation of the flux with time is that of initial rapid decrease followed by a long and gradual decline. The results of an experimental study regarding fouling mechanisms of membrane in separation of oil from oil-in-water emulsions are presented. Mullite microfiltration membranes were synthesized from kaolin clay as MF ceramic membranes. Hermia's models were used to investigate the fouling mechanisms of membranes. The effect of pressure, cross-flow velocity (CFV), temperature and oil concentration on flux decline has been investigated. The results show that cake filtration model can well predict the flux decline of mullite ceramic membranes. After cake filtration model, the best flux predicted to the experimental data was intermediate pore blocking model and worst predicted flux was for complete pore blocking model.
ACCESSION #
62006760

 

Related Articles

  • ULTRAFILTRATION OF OIL-IN-WATER EMULSION: FLUX ENHANCEMENT WITH STATIC MIXER. Koris, Andras; Krstic, Darko; Xianguo Hu; Vatai, Gyula // Environment Protection Engineering;2005, Vol. 31 Issue 3/4, p163 

    Conventional methods of oily emulsion separation are not effective in removing small oil droplets and emulsions, especially if the emulsion is stable and the oil concentration is low. This paper deals with the oil removal from oil-in-water emulsion by an ultrafiltration membrane under different...

  • Oily wastewater treatment using mullite ceramic membrane. Abbasi, Mohsen; Salahi, Abdolhamid; Mirfendereski, Mojtaba; Mohammadi, Toraj; Rekabdar, Fatemeh; Hemmati, Mahmoud // Desalination & Water Treatment;Jan2012, Vol. 37/38 Issue 1-3, p21 

    This paper presents performance of a microfiltration (MF) ceramic membrane for treatment of oily wastewaters. Mullite MF membranes were synthesized from kaolin clay. The effects of different operating parameters such as pressure (0.5-4 bar), volumetric flow rate (0-2 m/s), temperature...

  • Separation of oil/water emulsion using nano-particle (T1O2/AI2O3) modified PVDF ultrafiltration membranes and evaluation of fouling mechanism. Yi, X. S.; Yu, S. L.; Shi, W. X.; Wang, S.; Jin, L. M.; Sun, N.; Ma, C.; Sun, L. P. // Water Science & Technology;2013, Vol. 67 Issue 3, p477 

    In the present study, nano-sized TiO2/AI2O3 modified polyvinylidene fluoride (PVDF) membranes (MM) were fabricated and then utilized for oil/water emulsion separation. The results showed that, compared with PVDF membrane (OM), the contact angle of MM decreased and hydrophilicity increased. The...

  • Irreversible fouling of membrane bioreactors due to formation of a non-biofilm gel layer. Poorasgari, E.; Larsen, P.; X. Zheng; Nielsen, P. H.; Keiding, K.; Christensen, M. L. // Water Science & Technology;2014, Vol. 69 Issue 8, p1641 

    Extra-cellular polymeric substances (EPS), known to contribute to fouling in membrane bio-reactors (MBRs), are generally divided into bound and free EPS. The free EPS are able to form a gel layer on the membrane active surface. The mechanisms involved in formation of such layer and its effects...

  • The safe use of cationic flocculants with reverse osmosis membranes. Chesters, S. P.; Darton, E. G.; Gallego, Silvia; Vigo, F. D. // Desalination & Water Treatment;Jun2009, Vol. 6 Issue 1-3, p144 

    Flocculants are used in combination with coagulants to agglomerate suspended particles for removal by filtration. This technique is used extensively in all types of surface waters to reduce the silt density index (SDI) and minimise membrane fouling. Although organic cationic flocculants are...

  • Dead-end filtration of jet loop bioreactor and activated sludge suspensions. Bayar, Secil; Karagunduz, Ahmet; Keskinler, Bulent // Desalination & Water Treatment;Mar2016, Vol. 57 Issue 14, p6184 

    Fouling is the main disadvantage of membrane processes which causes decrease in flux with time. Although there are various mathematical models representing fouling with time, a simplified approach is still needed for predicting flux decline behavior over the course of filtration. Furthermore, a...

  • Enhanced biological phosphorus removal in a novel sequencing membrane bioreactor with gravitational filtration (GFS-MBR). Shibin Xia; Lijuan Jiang; Hongwei Wang; Zhaoji Zhang // Desalination & Water Treatment;Sep2009, Vol. 9 Issue 1-3, p259 

    A novel sequencing membrane bioreactor with gravitational filtration (GFS-MBR) was developed and its performance of biological phosphorus and nitrogen removal of the urban sewage was also studied in this paper. The GFS-MBR was operated in a 12-h cycle--anaerobic fill (0.5h), anaerobic mixing...

  • Membrane biofouling by extracellular polymeric substances or soluble microbial products from membrane bioreactor sludge. Ramesh, A.; Lee, D. J.; Lai, J. Y. // Applied Microbiology & Biotechnology;Mar2007, Vol. 74 Issue 3, p699 

    This study extracted the soluble microbial products and loosely bound and tightly bound extracellular polymeric substances (EPS) from suspended sludge from a membrane bioreactor, original and aerobically/anaerobically digested, and compared their fouling potentials on a microfiltration membrane....

  • The Effect of Feed Water Pretreatment on Ultrafiltration Membrane Performance. Kabsch-Korbutowicz, M.; Biłyk, A.; Mołczan, M. // Polish Journal of Environmental Studies;2006, Vol. 15 Issue 5, p719 

    The objectives of our study were to investigate the effects of water pretreatment by mean of coagulation, or MIEX® resin adsorption, on the removal of natural organic matter and on the fouling of membranes during the ultrafiltration process. In all cases water pretreatment resulted in an...

Share

Read the Article

Courtesy of THE LIBRARY OF VIRGINIA

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics