Microfiltration of the Sugar Refinery Wastewater Using Ceramic Membrane with Kenics Static Mixer

New environmental regulations and the increasing market preference for companies that respect the ecosystem had encouraged the industry to look after new treatments for its effluents. The sugar industry, one of the largest emitter of environmental pollutants, follows this tendency. Membrane technology is convenient for separation of suspended solids, colloids and high molecular weight materials that are present in a wastewater from sugar industry. The idea is to microfilter the wastewater, where the permeate passes through the membrane and becomes available for recycle and re-use in the sugar manufacturing process. For microfiltration of this effluent a tubular ceramic membrane was used with a pore size of 200 nm at transmembrane pressure in range of 1–3 bars and in range of flow rate of 50–150 l/h. Kenics static mixer was used for permeate flux enhancement. Turbidity and suspended solids were removed and the permeate flux was continuously monitored during the microfiltration process. The flux achieved after 90 minutes of microfiltration was in a range of 50–70 l/m2h. The obtained turbidity decrease was in the range of 50-99 % and total amount of suspended solids was removed.

Authors:

• Zita Šereš
• Ljubica Dokić
• Nikola Maravić
• Dragana Šoronja–Simović
• Cecilia Hodur
• Ivana Nikolić
• Biljana Pajin

Keywords:

• Ceramic membrane
• microfiltration
• sugar industry
• wastewater.

References:

[1] European Commision Reference Document on Best Available
Techniques in Common Waste Water and Waste Gas
Treatment/Management Systems in the Chemical Sector, February 2003,
http://eippcb.jrc.es , (accessed 10/09/2012).
[2] European Commision: Reference Document on Best Available
Techniques in the Food, Drink and Milk Industries. Dated January 2006,
http://eippcb.jrc.es , (accessed 10/09/2012).
[3] Schröder, P., Navarro-Aviñó, J., Azaizeh, H., Goldhirsh, A. G.,
DiGregorio, S., Komives, T., & Wissing, F., Using phytoremediation
technologies to upgrade waste water treatment in Europe, Environ. Sci.
Pollut. Res. Int., 14 (7), 490–497, 2007.
[4] Noble, R. D., & Stern, S. A. Membrane separations technology:
principles and applications (Vol. 2), Elsevier, 1995.
[5] Šereš, Z., Ultrafiltracija u industriji šećera. Monography, Zadužbina
Andrejević, Beograd i Tehnološki fakultet, Novi Sad, 23–33, 2009.
[6] Šaranović, Ž., Šereš, Z., Jokić, A., Pajin, B., Dokić, Lj., Gyura, J.,
Dalmacija, B., Šoronja Simović, D., Re-duction of solid content in
starch industry wastewater by microfiltration, Starch/Starke, 63, 64–74,
2011.
[7] Guimarães, C., Porto, P., Oliveira, R., & Mota, M., Continuous
decolourization of a sugar refinery wastewater in a modified rotating
biological contactor with Phanerochaete chrysosporium immobilized on
polyurethane foam disks, Process Biochem., 40 (2), 535–540, 2005.
[8] Jianlong, W., Hanchang, S., & Yi, Q., Wastewater treatment in a hybrid
biological reactor (HBR): effect of organic loading rates. Process
Biochem., 36 (4), 297–303, 2000.
[9] Jacangelo, J. G., Trussell, R. R., & Watson, M., Role of membrane
technology in drinking water treatment in the United States,
Desalination, 113(2), 119–127, 1997.
[10] Krstić, D.M., Koris, A.K., Tekić, M.N., Do static turbulence promoters
have potential in cross-flow membrane filtration applications,
Desalination, 191, 371–375, 2006.
[11] Koris, A., Krstic, D., Hu, X., Vatai, Gy., Ultrafiltration of oil in water
emulsion: flux enhancement with static mixer, Proceedings of the
Membrane Science and Technology Conference of Visegrad Group
PERMEA 2005, Polanica Zdrój, Poland, September 18–22, 2005.
[12] Jugoslovenski standard JUS ISO 6060, Kvalitet vode, Određivanje
hemijske potrošnje kiseonika, Službeni list SRJ br. 45/94, Beograd,
1994.
[13] Akay, G., & Wakeman, R. J., Mechanisms of permeate flux decay,
solute rejection and concentration polarisation in crossflow filtration of a
double chain ionic surfactant dispersion. J. of Membrane Sci., 88 (2),
177–195, 1994.
[14] Arora, N., & Davis, R. H., Yeast cake layers as secondary membranes in
dead–end microfiltration of bovine serum albumin. J. of Membrane Sci.,
92 (3), 247–256, 1994.