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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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Ion-exchange technology is one of the best for removing nitrate from drinking water. However, problems related to the disposal of spent brine from regeneration of exhausted resins must be overcome so that ion exchange can be applied more widely and economically, especially in small communities. In this background, a combined bio-regeneration and ion-exchange system was operated in order to prove that nitrate-laden resins could be bio-regenerated through direct contact with denitrifying bacteria. A nitrate-selective A520E resin was successfully regenerated by denitrifying bacteria. The bio-regeneration efficiency of nitrate-laden resins increased with the amount of flow passed through the ion-exchange column. When the fully exhausted resin was bio-regenerated for 5 days at the flowrate of 30 BV/hr and MLSS concentration of $125{\pm}25mg/L$, 97.5% of ion-exchange capacity was recovered. Measurement of nitrate concentrations in the column effluents also revealed that less than 5% of nitrate was eluted from the resin during 5 days of bio-regeneration. This result indicates that the main mechanism of bio-regeneration is the direct reduction of nitrate by denitrifying bacteria on the resin.
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참고문헌 (7)
참고문헌 신청
Bae, B. U. / 2004 / Treatment of spent brine from a nitrate exchange process using combined biological denitrification and sulfate precipitation / WATER SCIENCE AND TECHNOLOGY 49:413~419
Clifford, D. A. / 1993 / Biological Denitrification of Spent Regenerant Brine Using a Sequencing Batch Reactor / Water Research 27(9):1477~1484
Clifford, D. A. / 1993 / Ion Exchange for Nitrate Removal / American Water Works Association 85(4):135~143
Guter, G. A. / 2007 / Bio-degradation of Oxyanions Such as Perchlorate on Ion Exchange Resins / US Patent No. 7,311,843 B2
Samatya, S. / 2006 / Removal of Nitrate from Aqueous Solution by Nitrate Selective Ion Exchange Resins / Reactive and Functional Polymers 66(11):1206~1214
Clifford, D. A. / 1993 / Biological Denitrification of Spent Regenerant Brine Using a Sequencing Batch Reactor / Water Research 27(9):1477~1484
Clifford, D. A. / 1993 / Ion Exchange for Nitrate Removal / American Water Works Association 85(4):135~143
Guter, G. A. / 2007 / Bio-degradation of Oxyanions Such as Perchlorate on Ion Exchange Resins / US Patent No. 7,311,843 B2
Samatya, S. / 2006 / Removal of Nitrate from Aqueous Solution by Nitrate Selective Ion Exchange Resins / Reactive and Functional Polymers 66(11):1206~1214
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