Water treatment using the new concept of ion exchange membrane bioreactor

• Autorzy: Velizarov S. , Reis M. A. , Crespo J. G.
• Języki publikacji: EN

Abstrakty

EN

The ion exchange membrane bioreactor (IEMB) is a new concept for treating water, contaminated with inorganic charged pollutants, which uses a non-porous ion exchange membrane as a barrier between the water stream and a biocompartment. A suitable driving counter-ion is added to the biocompartment, providing the coupled counter-diffusion of the target contaminating ion, where the latter undergoes and a biodegradation (biotransfor-mation) to harmless product(s) by a mixed microbial culture. Transport of co-ions through the membrane is negligible due to their electrostatic repulsation (Donnan exclusion) from the similarly charged membrane surface. A case study based on nitrate as the target pollutant and chloride as the driving counter-ion is presented in order to show the potential of the IEMB process for drinking water denitrification. The effects of the most important process variables on the flux and removal were studied. The biofilm developing on the membrane surface, contacting the IEMB biocompartment, was found to serve as a reactive barrier for carbon source penetration into the treated water.

Słowa kluczowe

EN

ion exchange membrane bioreactor; Donnan dialysis; membrane transpor; water treatment

PL

zmiany jonowe; bioreaktor membranowy; transport membranowy; oczyszczanie wody

• Wydawca: West Pomeranian University of Technology. Publishing House
• Czasopismo: Polish Journal of Chemical Technology
• Rocznik: 2003
• Tom: Vol. 5, nr 2
• Strony: 40--43
• Opis fizyczny: Bibliogr. 12, rys., tab.

Twórcy

autor

Velizarov S.

autor

Reis M. A.

autor

Crespo J. G.

• CQFB / REQUIMTE, Department of Chemistry, Faculdade de Ciencias e Tecnologia, Universidade Nova de Lisboa, P-2829-516 Caparica, Portugal, tei: [phone]; fax: [phone],

Bibliografia

• (1) Hillis P. (Editor), Membrane Technology in Water and Waste Water Treatment, Northwest Water Ltd, UK, 2000.
• (2) Hichour M., Persin F., Sandeaux J., and Gavach C., Fluoride removal from waters by Donnan dialysis, Separation Science and Technology, 2000, 18, 1.
• (3) Dicye A., Larchct C., Auclair B. and Mar C., Transfert des fluorures a travers les membranes anioniques, European Polymer Journal, 1999, 35, 461.
• (4) Chang J., Manem J., and Beaubien A.., Membrane bioprocesses for the denitrification of drinking water supplies, Journal of Membrane Science, 1993, 80, 233.
• (5) Delanghe B, Nakamura F, Myoga H, and Magara Y. Biological denitrification with ethanol in a membrane biorcactor, Environmental Technology, 1994, 15, 61.
• (6) Barreiros A.M., Rodrigues C.M., Crespo J.P.S.G. and Reis M.A.M., Membrane bioreactor for drinking water denitrification, Bioprocess Engineering, 1998, 18, 297.
• (7) Mansell B.O. and Schroeder E.O., Biological denitrification in a continuous flow membrane reactor, Water Research, 1999, 33, 1845.
• (8) Fonseca A.O., Crespo J.G., Almeida J.S. and Reis A.M., Drinking water denitrification using anovel ion-exchange membrane biorcactor, Environmental Science and Technology, 34 (2000), 1557 - 1562.
• (9) Velizarov S., Rodrigues C.M., Reis A.M. and Crespo, J.G., Mechanism of charged pollutants removal in an ion exchange membrane bioreactor: drinking water denitrification, Biotechnology Bioengineering, 2001, 71, 245.
• (10) Velizarov S., Crespo J.G. and Reis A.M., Ion exchange membrane bioreactor for selective removal of nitrate from drinking water: control of ion fluxes and process performance, Biotechnology Progress, 2002, 18, 296 - 302.
• (11) WO 01/40118 Al, Treatment of Aqueous Media Containing Eletrically Charged Compounds.
• (12) Helfferich, F. Ion Exchange, McGraw-Hill, New York, 1962.