Acta Chimica Slovaca (ACS) publishes papers on fundamental and applied aspects of chemistry, biochemistry, chemical technology, chemical engineering and process control, biotechnology and food technology. Welcome are also topics which include chemical aspects of materials, physical chemistry and chemical physics, analytical chemistry, macromolecular chemistry and biomedical engineering.

Substrate inhibition and pH effect on denitritation with granular biomass

Stanislava Kecskésová *, Zuzana Imreová, Bibiána Kožárová, Ján Derco, Miloslav Drtil

Department of Environmental Engineering, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinskeho 9, 812 37 Bratislava, Slovak Republic

E-mail: * stanislava.vlckova@stuba.sk

Abstract: 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.

Keywords: denitritation, granulated biomass, methanol, pH, substrate inhibition, undissociated HNO2

Full paper in Portable Document Format: acs_0330.pdf

Acta Chimica Slovaca, Vol. 12, No. 1, 2019, pp. 91—96, DOI: 10.2478/acs-2019-0013