Assessment of silt density index (SDI) as fouling propensity parameter in reverse osmosis (RO) desalination systems

Abstract Due to its simplicity, silt density index (SDI) is extensively used in reverse osmosis systems despite its limitations in predicting membrane fouling. Employing a reliable fouling index with good reproducibility and precision is necessary. The aim of this investigation is to assess the reliability of SDI in order to understand the reasons for the low level of precision and accuracy. Different commercial SDI membranes and feedwater quality were used in this study. Results showed the existence of membrane properties’ variation within manufacturers, which then causes a lack of accuracy in fouling risk estimation. The nature of particles during SDI filtration provides information that particle concentration and size play a significant role in SDI quantification with substantial representation given by particles with size close to membrane nominal pore size. Moreover, turbidity-assisted SDI measurements along with determination of ultrafiltration permeate and clean water fouling potential, establish t...

[1]  Roger Ben Aim,et al.  Improving the measurement of the Modified Fouling Index using nanofiltration membranes (NF-MFI) , 2006 .

[2]  C. V. Vedavyasan.  Pretreatment trends — an overview , 2007 .

[3]  James E. Miller,et al.  Review of Water Resources and Desalination Technologies , 2003 .

[4]  Chanhyuk Park,et al.  Variation and prediction of membrane fouling index under various feed water characteristics , 2006 .

[5]  Gilbert Galjaard,et al.  Monitoring particulate fouling in membrane systems , 1998 .

[6]  Noreddine Ghaffour,et al.  The challenge of capacity-building strategies and perspectives for desalination for sustainable water use in MENA , 2009 .

[7]  S.C.J.M. van Hoof,et al.  The effect of ultrafiltration as pretreatment to reverse osmosis in wastewater reuse and seawater desalination applications , 1999 .

[8]  June-Seok Choi,et al.  A systematic approach to determine the fouling index for a RO/NF membrane process , 2009 .

[9]  M. Pérez,et al.  Comparison of MF/UF pretreatment with conventional filtration prior to RO membranes for surface seawater desalination , 2002 .

[10]  Hacene Mahmoudi,et al.  Use of ultrafiltration membranes in the treatment of refinery wastewaters , 2009 .

[11]  John McArdle,et al.  UF pretreatment for SWRO: pilot studies , 2005 .

[12]  Seymour S. Kremen,et al.  Silt density indices (SDI), percent plugging factor (%PF): their relation to actual foulant deposition , 1998 .

[13]  A. Fane,et al.  Fouling effects on rejection in the membrane filtration of natural waters , 2000 .

[14]  J. C. Schippers,et al.  The modified fouling index, a method of determining the fouling characteristics of water , 1980 .

[15]  Ho Kyong Shon,et al.  Effect of pre-treatment on fouling propensity of feed as depicted by the modified fouling index (MFI) and cross-flow sampler–modified fouling index (CFS–MFI) , 2009 .

[16]  S. G. Yiantsios,et al.  Colloidal fouling of RO membranes: an overview of key issues and efforts to develop improved prediction techniques , 2005 .

[17]  Joan Sanz,et al.  Reverse osmosis pretreatment alternatives: Demonstration plant in the seawater desalination plant in Carboneras, Spain , 2011 .

[18]  Matthias Wessling,et al.  Silt Density Index and Modified Fouling Index relation, and effect of pressure, temperature and membrane resistance , 2011 .

[19]  Mohammad Nurul Alam Hawlader,et al.  An experiment with different pretreatment methods , 2003 .

[20]  Steve Siverns,et al.  UF membranes for RO desalination pretreatment , 2005 .

[21]  Graeme Pearce,et al.  Pretreatment options for large scale SWRO plants: case studies of OF trials at Kindasa, Saudi Arabia, and conventional pretreatment in Spain , 2004 .

[22]  J. Schrotter,et al.  Current and Emerging Developments in Desalination with Reverse Osmosis Membrane Systems , 2010 .

[23]  Liu Yang,et al.  Pilot testing of outside-in UF pretreatment prior to RO for high turbidity seawater desalination , 2006 .

[24]  K. Glucina,et al.  Assessment of UF pretreatment prior RO membranes for seawater desalination , 1999 .

[25]  Veronique Bonnelye,et al.  The sensitivity of SDI analysis: from RO feed water to raw water , 2008 .

[26]  Maria D. Kennedy,et al.  Development of the MFI-UF in constant flux filtration , 2004 .

[27]  S. Vigneswaran,et al.  Assessment of pretreatment to microfiltration for desalination in terms of fouling index and molecular weight distribution , 2010 .

[28]  Anthony G Fane,et al.  Comparison of MFI-UF constant pressure, MFI-UF constant flux and Crossflow Sampler-Modified Fouling Index Ultrafiltration (CFS-MFI UF). , 2011, Water research.

[29]  A. Nahrstedt,et al.  New insights into silt density index and modified fouling index measurements , 2008 .

[30]  N. Ghaffour.  Modeling of fouling phenomena in cross-flow ultrafiltration of suspensions containing suspended solids and oil droplets , 2004 .

[31]  George M. Ayoub,et al.  Reverse osmosis technology for water treatment: State of the art review , 2011 .

[32]  S. Sablani,et al.  Fouling of Reverse Osmosis and Ultrafiltration Membranes: A Critical Review , 2005 .

[33]  N.R.G. Walton.  Some observations on the considerable variability of silt density index results due to equipment, filter and operator variables , 1987 .

[34]  Benny D. Freeman,et al.  Reverse osmosis desalination: water sources, technology, and today's challenges. , 2009, Water research.

[35]  Seungkwan Hong,et al.  Evaluation of membrane fouling potential by multiple membrane array system (MMAS): Measurements and applications , 2010 .

[36]  Maria D. Kennedy,et al.  The modified fouling index using ultrafiltration membranes (MFI-UF): characterisation, filtration mechanisms and proposed reference membrane , 2002 .

[37]  Seungkwan Hong,et al.  Assessment of various membrane fouling indexes under seawater conditions , 2009 .

[38]  C. D. Moody,et al.  Yuma desalting test facility : Foulant component study , 1983 .

[39]  S. G. Yiantsios,et al.  An assessment of the Silt Density Index based on RO membrane colloidal fouling experiments with iron oxide particles , 2003 .

[40]  Vicki Chen,et al.  Investigations of the coupled effect of cake-enhanced osmotic pressure and colloidal fouling in RO using crossflow sampler-modified fouling index ultrafiltration , 2011 .

[41]  P.A.C. Bonné,et al.  Prediction of flux decline in membrane systems due to particulate fouling , 1997 .

[42]  A. Hamou,et al.  Performance evaluation of BWRO desalination plant - a case study. , 2009 .

[43]  Vicki Chen,et al.  Crossflow Sampler Modified Fouling Index Ultrafiltration (CFS-MFIUF)―An alternative Fouling Index , 2010 .

[44]  Noreddine Ghaffour,et al.  Removal of excess fluoride ions from Saharan brackish water by adsorption on natural materials , 2010 .

[45]  Thomas Melin,et al.  State-of-the-art of reverse osmosis desalination , 2007 .

[46]  Matthias Wessling,et al.  Effect of testing conditions and filtration mechanisms on SDI , 2011 .

[47]  Ali Redha Hussain,et al.  Seawater RO plant operation and maintenance experience: addur desalination plant operation assessment , 2004 .

[48]  Veronique Bonnelye,et al.  UF/MF as RO pre-treatment: the real benefit , 2008 .