Photoacoustic Spectroscopy for the Quantification of N sub( 2)O in the Off-Gas of Wastewater Treatment Plants

Photoacoustic Spectroscopy for the Quantification of N sub( 2)O in the Off-Gas of Wastewater Treatment Plants

Different configurations of photoacoustic (PA) setups for the online-measurement of gaseous N sub( 2)O, employing semiconductor lasers at 2.9 and 4.5 mu m, were developed and tested. Their performance was assessed with respect to the analysis of N sub( 2)O emissions from wastewater treatment plants....

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Veröffentlicht in:Analytical chemistry (Washington) 2017-03, Vol.89 (6), p.3795-3795
Hauptverfasser: Thaler, Klemens M, Berger, Christoph, Leix, Carmen, Drewes, Jorg, Niessner, Reinhard, Haisch, Christoph
Format: Artikel
Sprache:eng
Schlagworte:
Bioreactors
Devices
Dynamic range
Emission analysis
Humidity
Lasers
Plants (organisms)
Wastewater treatment
Online-Zugang:Volltext
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:Different configurations of photoacoustic (PA) setups for the online-measurement of gaseous N sub( 2)O, employing semiconductor lasers at 2.9 and 4.5 mu m, were developed and tested. Their performance was assessed with respect to the analysis of N sub( 2)O emissions from wastewater treatment plants. For this purpose, the local N sub( 2)O emissions of a wastewater treatment bioreactor was sampled by a dedicated mobile sampling device, and the total N sub( 2)O emissions were analyzed in the gastight headspace of the bioreactor. We found that the use of a quantum-cascade laser emitting at about 4.53 mu m, operated in a wavelength modulation mode, in combination with a conventional longitudinal PA cell yielded the highest sensitivity (
ISSN:0003-2700