Substrate inhibition and pH effect on denitritation with granular biomass
, , , y | 09 jul 2019
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Publicado en línea: 09 jul 2019
Páginas: 91 - 96
DOI: https://doi.org/10.2478/acs-2019-0013
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© 2019 Stanislava Kecskésová et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Undissociated HNO2 (up to 2 mg dm−3) was confirmed as substrate inhibitor for granular biomass from a denitritation upflow sludge bed reactor used for biological removal of nitrite. On the contrary, total nitrite nitrogen (N-NO2 up to 500 mg dm−3) and methanol (COD up to 2000 mg dm−3) were not proven to be inhibitors. pH also affected the denitritation efficiency (optimal pH was 5.9). Reduction of HNO2 concentration in the reactor by effluent recycling is recommended.