<abstract xmlns="http://www.w3.org/1999/xhtml"> Efficient nitritation was tested in SBR with the aim to accumulate nitrites and to minimize nitrates production in reject wastewater with 500 mg L-1 (NH4++ NH3)-N and with different molar ratios of HCO3-: (NH4++ NH3)-N (1.1-2.1). More than 80 % efficiency of nitritation and permanent inhibition of NOB were achieved at the ratios of 1.71.9 and at the loading of 0.16-0.6 kg (NH4++ NH3)-N m-3 d-1. Under these conditions, the outflow pH was in the range of 5.9-6.5, outflow c (NO2- + HNO2)-N increased up to 400 mg L-1 and c (NO3-)-N dropped below 50 mg L-1. Undissociated HNO2 was confirmed as the main inhibitor of NOB.</abstract>

Efficient nitritation was tested in SBR with the aim to accumulate nitrites and to minimize nitrates production in reject wastewater with 500 mg L-1 (NH4++ NH3)-N and with different molar ratios of HCO3-: (NH4++ NH3)-N (1.1-2.1). More than 80 % efficiency of nitritation and permanent inhibition of NOB were achieved at the ratios of 1.71.9 and at the loading of 0.16-0.6 kg (NH4++ NH3)-N m-3 d-1. Under these conditions, the outflow pH was in the range of 5.9-6.5, outflow c (NO2- + HNO2)-N increased up to 400 mg L-1 and c (NO3-)-N dropped below 50 mg L-1. Undissociated HNO2 was confirmed as the main inhibitor of NOB.

Alternative processes of nitrogen removal from wastewater — startup of nitritation reactor

Acta Chimica Slovaca

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Efficient nitritation was tested in SBR with the aim to accumulate nitrites and to minimize nitrates production in reject wastewater with 500 mg L-1 (NH4++...

Alternative processes of nitrogen removal from wastewater — startup of nitritation reactor

Published Online: Jun 23, 2017

Page range: 70 - 73

DOI: https://doi.org/10.1515/acs-2017-0012

Keywords
AOB, nitritation, NOB inhibition, sequencing batch reactor, sludge reject water

© Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Alternative processes of nitrogen removal from wastewater — startup of nitritation reactor

Published Online: Jun 23, 2017

Page range: 70 - 73

DOI: https://doi.org/10.1515/acs-2017-0012

KeywordsAOB, nitritation, NOB inhibition, sequencing batch reactor, sludge reject water

© Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Keywords
AOB, nitritation, NOB inhibition, sequencing batch reactor, sludge reject water