The effect of SRT on nitrate formation during autotrophic nitrogen removal of anaerobically treated wastewater

Title
The effect of SRT on nitrate formation during autotrophic nitrogen removal of anaerobically treated wastewater
Authors
배재호
Keywords
Anaerobic ammonium oxidation (anammox); autotrophic nitrogen removal; solids retention time
Issue Date
2013
Publisher
WATER SCIENCE AND TECHNOLOGY
Series/Report no.
WATER SCIENCE AND TECHNOLOGY; vol.68 no.8 startpage 1751 endpage 1756
Abstract
Autotrophic nitrogen removal, coupling nitritation (ammonium to nitrite) with anaerobic ammonium oxidation (anammox), offers a promising nitrogen-removal alternative, especially for post-treatment of anaerobically-treated wastewater. However, previous reports suggest that less than 90% total nitrogen removal should be expected with this process alone because over 10% of the ammonium removed will be converted to nitrate. This is caused because nitrite conversion to nitrate is required for reduction of carbon dioxide to cell carbon. However, recent research results suggest that more limited nitrate formation of only a few percent sometimes occurs. It was hypothesized such lower nitrate yields may result from use of long solids retention times (SRT) where net biological yields are low. Overall reaction equations were developed for each process and combined to determine the effect of SRT on process stoichiometry. The results support the use of a long SRT to reduce net cell yield, which should result in only a few percentage conversion to nitrate during ammonium removal.
URI
http://dspace.inha.ac.kr/handle/10505/32985
ISSN
0273-1223
Appears in Collections:
College of Engineering(공과대학) > Environmental Engineering (환경공학) > Local Access Journal Papers, Reports(환경공학 논문, 보고서)

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

Browse