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http://dx.doi.org/10.12652/Ksce.2018.38.4.0547

Effect of Silica and Iron on the Fouling Tendency of Reverse Osmosis Membrane for Treating Wastewater from an Integrated Iron and Steel Mill  

Oh, Hee-Wan (The University of Suwon)
Lee, Chae-Young (The University of Suwon)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.38, no.4, 2018 , pp. 547-553 More about this Journal
Abstract
An integrated iron and steel mill uses a large amount of water and produces wastewater which contains various contaminants such as iron, manganese, etc. Especially, in some regions of Southeast Asia, the concentration of silica in iron and steel mill wastewater is higher than in other countries. Silica is known to be one of the main causes for fouling in the membrane processes for water reuse. In cases of high concentrations of silica in iron and steel mill wastewater, the ferrous silicate tends to be formed. This could lead to higher fouling tendency depositing on the membrane surface. Therefore we conducted a pilot test to investigate the effect of silica and iron on the fouling tendency of reverse osmosis (RO) membrane for treating two types of wastewater from an integrated iron and steel mill. In this case of treated wastewater from iron and steel mill, RO pilot plant was operated with the fluxes 15.9LMH and 18.8LMH for 112 days to investigate the fouling characteristics. The results found that the fluctuation of flux was much wider than the average flux and the minimum permeability was low at 78%. In the case of treated runoff from an integrated iron and steel mill, the average concentration of iron was lower than in wastewater. RO pilot test was conducted with the flux 18.8LMH for 46 days. The results found that runoff had a lower fouling tendency and pre-treatment using microfiltration (MF) could minimize the fouling problem of RO.
Keywords
Silica; Iron and steel mill wastewater; Fouling; Reverse osmosis; Runoff; Reuse;
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  • Reference
1 American Public Health Association (2012). Standard Methods for the Examination of Water and Wastewater, 22nd Edition, pp. 1-1496.
2 Chan, S. H., Chen, Z. J. and He, P. (1995). "Effect of ferric chloride on silica fouling." Journal of Heat Transfer, Vol. 117, pp. 323-328.   DOI
3 Choi, J. H., Yoo, C. S., Lee, J. W., Sim, J. H., Lee, S. H. and Kim, Y. O. (2014). "Scale reduction evaluation of RO system for steel wastewater reuse by chemical pretreatment." Journal of the Korean Society of Civil Engineers (in Korean), pp. 401-402.
4 Choi, S. K. (2013). "Pre-treatment and concentrate treatment of reverse osmosis process for recycling of wastewater from ion and steel making process." Proceedings of the 2013 Conference Korean Society of Water and Wastewater. Korean Society on Water Environment, F-E19 (in Korean), pp. 111-112.
5 Iler, R. K. (1979). The Chemistry of Silica : Solubility, Polymerization, Colloid and Surface Properties, and Biochemistry, pp. 1-896.
6 Pham, A. L., Sedlak, D. L. and Doyle, F. M. (2012). "Dissolution of mesoporous silica supports in aqueous solution: Implications for mesoporous silica-based water treatment process." Applied Catalysis B : Environmental 126, pp. 258-264.   DOI
7 Julia, N. H., Steve, T. and Ames, I. (2016). Direct Membrane Treatment of Anaerobic High Iron and Manganese Groundwaters, Harn R/O Systems, Inc., Venice, pp. 1-25.
8 Kimura, K., Okazaki, S., Ohashi, T. and Watanabe, Y. (2016). "Importance of the co-presence of silica and organic matter in membrane fouling for RO filtering MBR effluent." Journal of Membrane Science, Vol. 501, pp. 60-67.   DOI
9 Koo, T., Lee, Y. J. and Sheikholeslami, R. (2001). "Silica fouling and cleaning of reverse osmosis membranes." Desalination, Vol. 139, Issues 1-3, pp. 43-56.   DOI
10 Roque, H. (1996). Chemical Water Treatment: Principles and Practice, VHC Publishers, Inc., New York.
11 Safarik, J. and Phipps, D. W. (2017). "RO membrane surface factors influencing specific flux." 2017 AMTA/AWWA Membrane Technology Conference and Exposition(MTC17), Long Beach, California, pp. 1-12.
12 Sahachaiyunta, P., Koo, T. and Sheikholeslami, R. (2002). "Effect of several inorganic species on silica fouling in RO membranes." Desalination, Vol. 144, Issues 1-3, pp. 373-378.   DOI
13 Sheikholeslami, R., Al-Mutaz, I. S., Koo, T. and Young, A. (2001). "Pretreatment and the effect of cations and anions on prevention of silica fouling." Desalination, Vol. 139, Issues 1-3, pp. 83-95.   DOI
14 Wong, J. M., Brown and Caldwell (2014). "From industrial wastewater to ultrapure water using membrane technologies." 2014 Membrane Technology Conference & Exposition, AWWA/AMTA Membrane Technology Conference, pp. 1-10.
15 DOW Chemical Company, The DOW Water & Process Solution: FilmtecTM Reverse Osmosis Membranes, Techmical Manual No. 609-00071-1009, pp. 45-48, pp. 63-64.
16 Weres, O., Yee, A. and Taso, L. (1981). "Kinetics of silica polymerization." Journal of Colloid and Interface Science, pp. 379-402.