Heterotrophic and elemental-sulfur-based autotrophic denitrification processes for simultaneous nitrate and Cr(VI) reduction

Nitrate and chromate can be present together in water resources as nitrate is a common co-contaminant in surface and ground waters. This study aims at comparatively evaluating simultaneous chromate and nitrate reduction in heterotrophic and sulfur-based autotrophic denitrifying column bioreactors. I...

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Bibliographic Details
Published in:Water research (Oxford) 2014-03, Vol.50, p.278-286
Main Authors: Sahinkaya, Erkan, Kilic, Adem
Format: Article
Language:English
Subjects:
Autotrophic denitrification
Autotrophic Processes
Bacteria - metabolism
Batch Cell Culture Techniques
Biodegradation, Environmental
Bioreactors - microbiology
Chromate removal
Chromium - isolation & purification
Denitrification
Earth sciences
Earth, ocean, space
Elemental sulfur
Engineering and environment geology. Geothermics
Exact sciences and technology
Heterotrophic denitrification
Heterotrophic Processes
Nitrate removal
Nitrates - isolation & purification
Pollution, environment geology
Sulfur - metabolism
Waste Disposal, Fluid
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Summary:Nitrate and chromate can be present together in water resources as nitrate is a common co-contaminant in surface and ground waters. This study aims at comparatively evaluating simultaneous chromate and nitrate reduction in heterotrophic and sulfur-based autotrophic denitrifying column bioreactors. In sulfur-based autotrophic denitrification process, elemental sulfur and nitrate act as an electron donor and an acceptor, respectively, without requirement of organic supplementation. Autotrophic denitrification was complete and not adversely affected by chromate up to 0.5 mg/L. Effluent chromate concentration was
ISSN:0043-1354
1879-2448
DOI:10.1016/j.watres.2013.12.005