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Effect of salinity on N2O production during shortcut biological nitrogen removal from landfill leachate

Paper ID Volume ID Publish Year Pages File Format Full-Text
20472 43176 2014 9 PDF Available
Title
Effect of salinity on N2O production during shortcut biological nitrogen removal from landfill leachate
Abstract

Three identical SBR adapted to different salinity were applied to investigate the characteristics of the treatment performance and N2O production (PN2O)(PN2O) during shortcut biological nitrogen removal from landfill leachate under various operating parameters. Increase of salinity might deteriorate the activity of the microorganisms leading to the increase of PN2OPN2O, however, the system could be gradually adapted to the inhibition and alleviate the detrimental effect to some extent. The system acclimated to high salinity provided better performance under high salinity shock and a lower possibility of PN2OPN2O, while a sudden decrease in salinity can cause a temporary increase in PN2OPN2O. High salinity strengthened the influence of high ammonia nitrogen concentration and low DO concentration on PN2OPN2O while the strengthening effect was unconspicuous at high DO concentration. The anoxic phase did not produce a significant amount of N2O even at the lowest C/N ratio of 0.5 and was less susceptible to salinity. Characterization of the biomass composition using fluorescence in situ hybridization analysis confirmed that the relative proportion of Nitrosomonas europaea   was increased with the increase of the salinity, which may be an important factor for the strengthening effect of salinity on PN2OPN2O.

Keywords
Salinity effect; N2O production; Shortcut biological nitrogen removal; Landfill leachate; High ammonia nitrogen
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Effect of salinity on N2O production during shortcut biological nitrogen removal from landfill leachate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 117, Issue 5, May 2014, Pages 582–590
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us