1. bookVolume 10 (2017): Issue 1 (April 2017)
Journal Details
License
Format
Journal
eISSN
1339-3065
First Published
10 Dec 2012
Publication timeframe
2 times per year
Languages
English
access type Open Access

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

Published Online: 23 Jun 2017
Volume & Issue: Volume 10 (2017) - Issue 1 (April 2017)
Page range: 70 - 73
Journal Details
License
Format
Journal
eISSN
1339-3065
First Published
10 Dec 2012
Publication timeframe
2 times per year
Languages
English
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.

Keywords

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