Sodium molybdate inhibits sulphate reduction in the anaerobic treatment of high-sulphate molasses wastewater |
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Authors: | Vibhash K Yadav David B Archer |
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Institution: | (1) Norwich Laboratory, Agricultural and Food Research Council Institute of Food Research, Colney Lane, NR4 7UA Norwich, UK |
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Abstract: | Summary Three concentrations (0.1 mM, 0.5 mM, and 1.0 mM) of sodium molybdate were added to continuously fed anaerobic upflow filters (1.01) treating a high-sulphate molasses wastewater which contained approximately 27.0 g chemical oxygen demand/l and 6.0 g sulphate/l. Sodium molybdate (0.1 mM) did not inhibit sulphate reduction by the filter. Higher concentrations (0.5 mM and 1.0 mM) inhibited sulphate reduction but methanogenesis was also slightly affected. The microflora of the filters adapted to the continuous presence of sodium molybdate (1.0 mM) and sulphate reduction was then evident. Addition of a higher concentration of sodium molybdate was then necessary to inhibit sulphate reduction but methanogenesis was also adversely affected. |
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