TITLE

Assessment of fouling of an RO process dedicated to indirect potable reuse

AUTHOR(S)
Raffin, Marie; Germain, Eve; Judd, Simon
PUB. DATE
February 2012
SOURCE
Desalination & Water Treatment;Feb2012, Vol. 40 Issue 1-3, p302
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Autopsies of three elements of a three-stages reverse osmosis process (lead, central and tail elements of respectively Stage 1, 2 and 3) treating microfiltered wastewater effluent were performed to quantify the propensity of each stage to foul. As expected, results showed fouling on Stages 1 and 2 to be predominantly biofouling whilst Stage 3, the most heavily fouled, was subject to most pronounced scaling, predominantly by calcium phosphate. Chloramine dosing in the RO feed water appeared largely ineffective for membrane biofouling mitigation due to its low rejection by the RO membrane leading to a very low residual in the RO retentate stream. Five antiscalants (three commercialised and two under development) were tested at pilot scale and their efficiency for scaling mitigation compared. Results showed wide variations in effectiveness, with the novel reagents showing the most promising results. However, none of the antiscalants tested succeeded in completely suppressing scaling without the addition of sulphuric acid. A cost analysis showed the operating cost to be most sensitive to pH adjustment, with reduced acid dosing requirement providing a significant cost benefit.
ACCESSION #
74481611

 

Related Articles

  • Operational experience from hybrid RO system at SAFI wastewater re-use RO plant. Bartels, Craig; Boda, Roman; Abrar, Ahmed // Desalination & Water Treatment;Sep2015, Vol. 55 Issue 11, p3149 

    Operation of wastewater treatment plants can be very challenging due to the high fouling tendency of wastewater. Much knowledge has been gained over the past few years to guide design engineers on the optimum design for wastewater reverse osmosis (RO) plant. The implementation of this knowledge...

  • Modeling, Instrumentation, Automation, and Optimization of Water Resource Recovery Facilities. Sweeney, Michael W.; Kabouris, John C. // Water Environment Research (10614303);Oct2014, Vol. 86 Issue 10, p1314 

    A review of the literature published in 2013 on topics relating to water resource recovery facilities (WRRF) in the areas of modeling, instrumentation, automation and optimization of wastewater treatment is presented. Note that WEF has adopted the term 'WRRF' replacing such previous terms as...

  • Planning needed to prevent RO system fouling. Finan, Michael A.; Tracey, Denise A. // WaterWorld;Mar/Apr95, Vol. 11 Issue 2, p22 

    Discusses the proper approach in preventing reverse-osmosis (RO) system fouling. Particulate and colloidal fouling; Biological fouling prevention; Advantages and liabilities of chlorination, ozonation and ultraviolet irradiation; Scale formation; Predicting scale formation; Methods of scale...

  • PROCESS MONITORING. Alspach, Brent // Opflow Online;Feb2014, Vol. 40 Issue 2, p2 

    The article discusses the causes of the collection or formation of materials that adds resistance to flow in the primary mechanisms of reverse osmosis (RO) and nanofiltration (NF) plants, including plugging, scaling, and organic fouling.

  • Energy recovery using salinity differences in a multi-effect distillation system. Touati, Khaled; de la Calle, Alberto; Tadeo, Fernando; Roca, Lidia; Schiestel, Thomas; Alarcón-Padilla, Diego-César // Desalination & Water Treatment;Sep2015, Vol. 55 Issue 11, p3048 

    The use of Salinity Gradient methodologies to recover part of the osmotic energy in the brine of multi-effect distillation (MED) systems is explored here. Measurements from a membrane-based Pressure Retarded Osmosis laboratory system have been used to estimate the energy that would be recovered...

  • Other.  // Desalination & Water Treatment;May2015, Vol. 54 Issue 9, p(i) 

    A table of contents for the issue is presented.

  • Effect of pretreatment on membrane fouling and VMD performance in the treatment of RO-concentrated wastewater. Yang Zhiqing; Lu Xiaolong; Wu Chunrui; Wang Xuan // Desalination & Water Treatment;Nov2013, Vol. 51 Issue 37-39, p11 

    The polyvinylidene fluoride hollow fiber hydrophobic membrane was applied in vacuum membrane distillation (VMD) process for the treatment of reverse osmosis-concentrated wastewater from a steel plant. The effects of pretreatment methods on the CODcr removal, the performance and membrane fouling...

  • Amorphous aluminosilicate scaling characterization in a reverse osmosis membrane. Cob, S. Salvador; Beaupin, C.; Hofs, B.; Nederlof, M. M.; Harmsen, D. J. H.; Cornelissen, E. R.; Zwijnenburg, A.; Güner, F. E. Genceli; Witkamp, G. J. // Desalination & Water Treatment;Jan2013, Vol. 51 Issue 4-6, p936 

    This paper describes the results of experiments performed in a high-recovery system to elucidate the silica scaling phenomenon and characterize the scaling. In this research, cation exchange pretreatment is used to reduce Ca2+, Ba2+, and Mg2+ levels to prevent scaling during subsequent...

  • Assessment of silt density index (SDI) as fouling propensity parameter in reverse osmosis (RO) desalination systems. Rachman, R. M.; Ghaffour, N.; Wali, F.; Amy, G. L. // Desalination & Water Treatment;Jan2013, Vol. 51 Issue 4-6, p1091 

    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...

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