Wastewater from wet lime(stone)-gypsum flue gas desulphurisation (FGD) processes in coal-fired power plants contains nitrate. Where case selective catalytic reduction (SCR) of NOx is applied the wastewater can also contain ammonia. For the removal of both nitrate and ammonia, biological processes are an attractive option. A bottle-neck for application of biological processes might be the high chloride concentration and relatively high temperature of the wastewater. Therefore research work was performed in fluid-bed reactors at pilot-plant scale for both biological nitrification and denitrification. Biological nitrification was studied up to 34 gCl−/l and nitrite was the main product formed. Biological denitrification was effective up to at least 45 gCl−/l. Both nitrate and nitrite were removed effectively.
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Research Article|
July 01 1997
Fluid bed biological nitrification and denitrification in high salinity wastewater
Leo H. J. Vredenbregt;
Leo H. J. Vredenbregt
*KEMA Nederland B.V., Utrechtseweg 310, 6812 AR Arnhem, The Netherlands
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Karsten Nielsen;
Karsten Nielsen
**VKI, Agern Allé 11, DK-2970 Hørsholm, Denmark
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Andrea A. Potma;
Andrea A. Potma
*KEMA Nederland B.V., Utrechtseweg 310, 6812 AR Arnhem, The Netherlands
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Gert Holm Kristensen;
Gert Holm Kristensen
**VKI, Agern Allé 11, DK-2970 Hørsholm, Denmark
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Christina Sund
Christina Sund
***Krüger A/S, Gladsaxevej 363, DK-2860 Søborg, Denmark
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Water Sci Technol (1997) 36 (1): 93–100.
Citation
Leo H. J. Vredenbregt, Karsten Nielsen, Andrea A. Potma, Gert Holm Kristensen, Christina Sund; Fluid bed biological nitrification and denitrification in high salinity wastewater. Water Sci Technol 1 July 1997; 36 (1): 93–100. doi: https://doi.org/10.2166/wst.1997.0021
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