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Effect of nitrate on anaerobic azo dye reduction

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dc.creator KİTİŞ, Mehmet
dc.creator Cirik, Kevser
dc.creator Cinar, Ozer
dc.date 2012-12-31T22:00:00Z
dc.date.accessioned 2020-10-06T09:35:53Z
dc.date.available 2020-10-06T09:35:53Z
dc.identifier 2894f0cf-596b-4030-9e3c-a97d9aacf93c
dc.identifier 10.1007/s00449-012-0762-9
dc.identifier https://avesis.sdu.edu.tr/publication/details/2894f0cf-596b-4030-9e3c-a97d9aacf93c/oai
dc.identifier.uri http://acikerisim.sdu.edu.tr/xmlui/handle/123456789/55949
dc.description The aim of the study was to investigate the effect of nitrate on anaerobic color removal efficiencies. For this aim, anaerobic-aerobic sequencing batch reactor (SBR) fed with a simulated textile effluent including Remazol Brilliant Violet 5R azo dye was operated with a total cycle time of 12 h, including anaerobic (6 h) and aerobic cycles (6 h). Microorganism grown under anaerobic phase of the reactor was exposed to different amounts of competitive electron acceptor (nitrate) and performance of the system was determined by monitoring color removal efficiency, nitrate removal, nitrite formation and removal, oxidation reduction potential, color removal rate, chemical oxygen demand (COD), specific anaerobic enzyme (azo reductase) and aerobic enzyme (catechol 1,2 dioxygenase), and formation and removal of aromatic amines. Variations of population dynamics of microorganisms exposed to various amount of nitrate were identified by denaturing gradient gel electrophoresis (DGGE). It was found that nitrate has adverse effect on anaerobic color removal efficiency and color removal was achieved after denitrification process was completed. It was found that nitrate stimulates the COD removal efficiency and accelerates the COD removal in the first hour of anaerobic phase. About 90 % total COD removal efficiencies were achieved in which microorganism exposed to increasing amount of nitrate. Population dynamics of microorganisms exposed to various amount of nitrate were changed and diversity was increased.
dc.language eng
dc.rights info:eu-repo/semantics/closedAccess
dc.title Effect of nitrate on anaerobic azo dye reduction
dc.type info:eu-repo/semantics/article


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