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פותח על ידי קלירמאש פתרונות בע"מ -
Simultaneous removal of atrazine and nitrate using a biological granulated activated carbon (BGAC) reactor
Year:
2004
Authors :
מינץ, דרור
;
.
Volume :
79
Co-Authors:
Herzberg, M., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Dosoretz, C.G., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Tarre, S., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Michael, B., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Dror, M., Inst. of Soil Water/Environ. Sci., Volcani Research Center, POB 6, Bet Dagan, Israel
Green, M., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Facilitators :
From page:
626
To page:
631
(
Total pages:
6
)
Abstract:
The objective of this research was to characterize the performance of granulated activated carbon (GAC) as a carrier for Pseudomonas ADP in a non-sterile continuous fluidized bed reactor for atrazine degradation under anoxic conditions. The GAC was compared with two non-adsorbing carriers: non-adsorbing carbon particles ('Baker product') having the same surface area available for biofilm growth as the GAC, and sintered glass beads. The initial atrazine degradation efficiency was higher than 90% in the reactors with the non-adsorbing carriers, but deteriorated to 20% with time due to contamination by foreign denitrifying bacteria. In contrast, no deterioration was observed in the biological granulated activated carbon (BGAC reactor. A maximal atrazine volumetric and specific degradation rate of 0.820 ± 0.052 g atrazine dm-3 day-1 and 1.7 ± 0.4 g atrazine g-1 protein day-1 respectively were observed in the BGAC reactor. Concurrent atrazine biodegradation and desorption from the carrier was shown and an effluent concentration of 0.002 mg dm-3 (below the EPA standard) was achieved in the BGAC reactor. The advantages of the BGAC reactor over the non-adsorbing carrier reactors can probably be explained by the adsorption-desorption mechanism providing favorable microenvironmental conditions for atrazine-degrading bacteria. © 2004 Society of Chemical Industry.
Note:
Related Files :
Adsorption
Biodegradation
Carbon
environmental protection
microenvironment
microorganisms
Nitrates
surface property
עוד תגיות
תוכן קשור
More details
DOI :
10.1002/jctb.1031
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
29373
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:46
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Scientific Publication
Simultaneous removal of atrazine and nitrate using a biological granulated activated carbon (BGAC) reactor
79
Herzberg, M., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Dosoretz, C.G., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Tarre, S., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Michael, B., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Dror, M., Inst. of Soil Water/Environ. Sci., Volcani Research Center, POB 6, Bet Dagan, Israel
Green, M., Fac. of Civil/Environ. Eng. Technion, IIT Haifa, Haifa, Israel
Simultaneous removal of atrazine and nitrate using a biological granulated activated carbon (BGAC) reactor
The objective of this research was to characterize the performance of granulated activated carbon (GAC) as a carrier for Pseudomonas ADP in a non-sterile continuous fluidized bed reactor for atrazine degradation under anoxic conditions. The GAC was compared with two non-adsorbing carriers: non-adsorbing carbon particles ('Baker product') having the same surface area available for biofilm growth as the GAC, and sintered glass beads. The initial atrazine degradation efficiency was higher than 90% in the reactors with the non-adsorbing carriers, but deteriorated to 20% with time due to contamination by foreign denitrifying bacteria. In contrast, no deterioration was observed in the biological granulated activated carbon (BGAC reactor. A maximal atrazine volumetric and specific degradation rate of 0.820 ± 0.052 g atrazine dm-3 day-1 and 1.7 ± 0.4 g atrazine g-1 protein day-1 respectively were observed in the BGAC reactor. Concurrent atrazine biodegradation and desorption from the carrier was shown and an effluent concentration of 0.002 mg dm-3 (below the EPA standard) was achieved in the BGAC reactor. The advantages of the BGAC reactor over the non-adsorbing carrier reactors can probably be explained by the adsorption-desorption mechanism providing favorable microenvironmental conditions for atrazine-degrading bacteria. © 2004 Society of Chemical Industry.
Scientific Publication
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