Ion Exchange Membrane Bioreactor for Selective Removal of Nitrate from Drinking Water: Control of Ion Fluxes and Process Performance

2002 ◽  
Vol 18 (2) ◽  
pp. 296-302 ◽  
Author(s):  
S. Velizarov ◽  
J.G. Crespo ◽  
M.A. Reis
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Selective Removal ◽  
Ion Exchange Membrane ◽  
Ion Fluxes ◽  
Process Performance ◽  
Water Control ◽  
Exchange Membrane

Removal of bromate, perchlorate and nitrate from drinking water in an ion exchange membrane bioreactor

2005 ◽  
Vol 5 (5) ◽  
pp. 9-14 ◽  
Author(s):  
C.T. Matos ◽  
S. Velizarov ◽  
J.G. Crespo ◽  
M.A.M. Reis
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Ion Exchange Membrane ◽  
Microbial Culture ◽  
Experimental Conditions ◽  
Biological Reduction ◽  
Permselective Membrane ◽  
Donnan Dialysis ◽  
Exchange Membrane

The presence of anionic micropollutants, such as bromate, perchlorate and nitrate, in drinking water supplies represents a risk for public health. This work evaluates the applicability of the ion exchange membrane bioreactor (IEMB) concept for their removal. The IEMB concept combines the transport of anionic pollutants, through a dense mono-anion permselective membrane, with their simultaneous biodegradation to harmless products by a suitable microbial culture in a separated biocompartment. The transport of the pollutant counter-ions (anions) is governed by the Donnan equilibrium principle and, therefore, it is possible to enhance it by using a more concentrated driving counter-ion (e.g. chloride) added to the biocompartment. The IEMB process proved to selectively remove nitrate and perchlorate to concentrations below the recommended levels of 4 ppb for ClO4− and 25 ppm of NO3−, from a model polluted stream containing 100 ppb of ClO4− and 60 ppm of NO3−. Transport studies, made under Donnan dialysis conditions, showed bromate fluxes comparable to those obtained for nitrate under similar experimental conditions. However, the rate of biological reduction of bromate was about one order of magnitude slower than that of nitrate.

Simultaneous removal of perchlorate and nitrate from drinking water using the ion exchange membrane bioreactor concept

2006 ◽  
Vol 40 (2) ◽  
pp. 231-240 ◽  
Author(s):  
Cristina T. Matos ◽  
Svetlozar Velizarov ◽  
João G. Crespo ◽  
Maria A.M. Reis
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Ion Exchange Membrane ◽  
Simultaneous Removal ◽  
Exchange Membrane

Removal of Bromate from Drinking Water Using the Ion Exchange Membrane Bioreactor Concept

2008 ◽  
Vol 42 (20) ◽  
pp. 7702-7708 ◽  
Author(s):  
Cristina T. Matos ◽  
Svetlozar Velizarov ◽  
Maria A. M. Reis ◽  
João G. Crespo
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Ion Exchange Membrane ◽  
Exchange Membrane

Removal of heavy metals from drinking water supplies through the ion exchange membrane bioreactor

Desalination ◽  
2006 ◽  
Vol 199 (1-3) ◽  
pp. 405-407 ◽  
Author(s):  
Adrian Oehmen ◽  
Rui Viegas ◽  
Svetlozar Velizarov ◽  
Maria A.M. Reis ◽  
João G. Crespo
Keyword(s):  
Heavy Metals ◽  
Drinking Water ◽  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Ion Exchange Membrane ◽  
Water Supplies ◽  
Removal Of Heavy Metals ◽  
Exchange Membrane

Drinking Water Denitrification Using A Novel Ion-exchange Membrane Bioreactor

2000 ◽  
Vol 34 (8) ◽  
pp. 1557-1562 ◽  
Author(s):  
Anabela D. Fonseca ◽  
João G. Crespo ◽  
Jonas S. Almeida ◽  
Maria A. Reis
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Ion Exchange Membrane ◽  
Exchange Membrane

Effect of Influent Concentration on Perchlorate Removal from Drinking Water in an Ion Exchange Membrane Bioreactor

2012 ◽  
Vol 170-173 ◽  
pp. 2399-2402 ◽  
Author(s):  
Meng Chun Gao ◽  
Cong Cong Zhao ◽  
Zong Lian She ◽  
Fang Yuan Liang ◽  
Zi Chao Wang
Keyword(s):  
Electrical Conductivity ◽  
Drinking Water ◽  
Ion Exchange ◽  
Environmental Protection Agency ◽  
Membrane Bioreactor ◽  
Hydraulic Retention Time ◽  
Operating Time ◽  
Ion Exchange Membrane ◽  
Protection Agency ◽  
Exchange Membrane

Removal of perchlorate from drinking water in an ion exchange membrane bioreactor (IEMB) was investigated at different influent ClO4- concentrations when the hydraulic retention time was 5h. Except the 49th day and the 51st day, the effluent ClO4- concentrations met standard of the U.S. Environmental Protection Agency (USEPA) required 18µg/L. In the initial stages of the influent ClO4- concentration increase, the ClO4- concentration in the anaerobic bioreactor, the effluent Cl- concentration and the effluent electrical conductivity increased suddenly. As the operating time increased, the ClO4- concentration in the sludge supernatant kept below 10µg/L after steady operation; the effluent Cl- concentration declined slowly and finally stabilized at about 90 mg/L; the effluent electrical conductivity decreased gradually and finally stabilized at about 279µs/cm.

Kinetics of nitrate and perchlorate removal and biofilm stratification in an ion exchange membrane bioreactor

2012 ◽  
Vol 46 (14) ◽  
pp. 4556-4568 ◽  
Author(s):  
Ana R. Ricardo ◽  
Gilda Carvalho ◽  
Svetlozar Velizarov ◽  
João G. Crespo ◽  
Maria A.M. Reis
Keyword(s):  
Ion Exchange ◽  
Membrane Bioreactor ◽  
Ion Exchange Membrane ◽  
Perchlorate Removal ◽  
Exchange Membrane ◽  
Kinetics Of
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