Abstract
THE occasional presence of chromates in sewages which receive discharges of trade effluents from the chromium-plating industry led us to investigate the influence of chromate on sewage purification processes. Samples of sewage containing sufficient potassium chromate to provide 1, 10 and 100 mgm. chromium per litre of sewage were treated in laboratory percolating filters, and comparisons were made with a control filter. The results, already published1, showed the oxidation of organic matter proceeded satisfactorily with up to 10 mgm. chromium per litre, but that nitrification of ammonium compounds did not occur to the same extent as in the control filter.
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References
Jenkins and Hewitt, J. Soc. Chem. Ind., 59, 41 (1940).
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JENKINS, S., HEWITT, C. Inhibition of Nitrification by Chromates. Nature 147, 239–240 (1941). https://doi.org/10.1038/147239a0
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DOI: https://doi.org/10.1038/147239a0
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