Abstract
Influence of Fe3+ Ions on Nitrate Removal by Autotrophic Denitrification Using Thiobacillus denitrificans
Highlights
Nitrate is commonly regarded as a contaminant due to its impact on the environment and public health
Small opalescent colonies were observed after 10 days of anoxic incubation on the thiosulphate/ nitrate solid growth medium, indicating presence of bacteria T. denitrificans
The number of cells remained quite constant during the whole experiment. These results strongly suggest that T. denitrificans was responsible for denitrification and sulphur-oxidation under the applied reactor operating conditions
Summary
Nitrate is commonly regarded as a contaminant due to its impact on the environment and public health. It is one of the major contaminants responsible for the eutrophication of aquatic ecosystems and degradation of surface water quality. Biological treatment processes have been widely used to remove nitrates from industrial wastewater.[7,8,9] several other techniques, such as ion exchange, reverse osmosis, nanofiltration, electrodialysis and chemical precipitation,[2,10,11,12,13,14] are available for both wastewater and drinking water treatment. The utilization of these physical/chemical processes has been limited due to their poor selectivity, expensive operation, and subsequent disposal problem of the generated nitrate waste brine
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