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dc.contributor.authorJung, JY-
dc.contributor.authorChung, YC-
dc.contributor.authorShin, HS-
dc.contributor.authorSon, DH-
dc.date.accessioned2024-01-21T07:41:33Z-
dc.date.available2024-01-21T07:41:33Z-
dc.date.created2021-09-02-
dc.date.issued2004-01-
dc.identifier.issn0043-1354-
dc.identifier.urihttps://pubs.kist.re.kr/handle/201004/137966-
dc.description.abstractThe modified zeo-SBR is recommended for a new nitrogen removal process that has a special function of consistent ammonium exchange and bioregeneration of zeolite-floc. Three sets of sequencing batch reactors, control, zeo-SBR, and modified zeo-SBR were tested to assess nitrogen removal efficiency. The control reactor consisted of anoxic-fill, aeration-mixing, settling, and decanting/idle phases, meaning that nitrogen removal efficiency was dependent on the decanting volume in a cycle. The zeo-SBR reactor was operated in the same way as the control reactor, except for daily addition of powdered zeolite in the SBR reactor. The operating order sequences in the zeo-SBR were changed in the modified zeo-SBR. Anoxic-fill phase was followed by aeration-mixing phase in the zeo-SBR, while aeration-mixing phase was followed by anoxic-fill phase in the modified zeo-SBR to carry NH(4)(+)-N over to the next operational cycle and to reduce total nitrogen concentration in the effluent. In the modified zeo-SBR, nitrification and biological regeneration occurred during the initial aeration-mixing phase, while denitrification and ammonium adsorption occurred in the following anoxic-fill phase. The changed operational sequence in the modified zeo-SBR to adapt the ammonium adsorption and biological regeneration of the zeolite-floc could enhance nitrogen removal efficiency. As a result of the continuous operation, the nitrogen removal efficiencies of the control and zeo-SBR were in 68.5-70.9%, based on the 33% of decanting volume for a cycle. The zeo-SBR showed a consistent ammonium exchange and bio-regeneration in the anoxic-fill and aeration-mixing phases, respectively. Meanwhile, the effluent total nitrogen of the modified zeo-SBR showed 50-60 mg N/L through ammonium adsorption of the zeolite-floc when the influent ammonium concentration was 315 mg N/L, indicating the T-N removal efficiency was enhanced over 10% in the same HRT and SRT conditions as those of control and zeo-SBR reactors. The ammonium adsorption capacity was found to be 6-7 mg NH(4)(+)-N/g FSS that is equivalent to 40 mg NH(4)(+)-N/L of ammonium nitrogen removal. (C) 2003 Elsevier Ltd. All rights reserved.-
dc.languageEnglish-
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD-
dc.subjectION-EXCHANGE-
dc.subjectCLINOPTILOLITE-
dc.titleEnhanced ammonia nitrogen removal using consistent biological regeneration and ammonium exchange of zeolite in modified SBR process-
dc.typeArticle-
dc.identifier.doi10.1016/j.watres.2003.09.025-
dc.description.journalClass1-
dc.identifier.bibliographicCitationWATER RESEARCH, v.38, no.2, pp.347 - 354-
dc.citation.titleWATER RESEARCH-
dc.citation.volume38-
dc.citation.number2-
dc.citation.startPage347-
dc.citation.endPage354-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.identifier.wosid000188061900010-
dc.identifier.scopusid2-s2.0-1542752447-
dc.relation.journalWebOfScienceCategoryEngineering, Environmental-
dc.relation.journalWebOfScienceCategoryEnvironmental Sciences-
dc.relation.journalWebOfScienceCategoryWater Resources-
dc.relation.journalResearchAreaEngineering-
dc.relation.journalResearchAreaEnvironmental Sciences & Ecology-
dc.relation.journalResearchAreaWater Resources-
dc.type.docTypeArticle-
dc.subject.keywordPlusION-EXCHANGE-
dc.subject.keywordPlusCLINOPTILOLITE-
dc.subject.keywordAuthorammonia nitrogen-
dc.subject.keywordAuthorzeolite-
dc.subject.keywordAuthorbioregeneration-
dc.subject.keywordAuthorammonium exchange-
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