Process analysis of biofilms by photoacoustic spectroscopy

T. Schmid, C. Helmbrecht, U. Panne, C. Haisch, R. Niessner

Publikation: Beitrag in FachzeitschriftArtikelBegutachtung

31 Zitate (Scopus)

Abstract

Biofilms are aggregates of microorganisms and biopolymers which occur at aqueous interfaces. Biofilms play an important role in the degradation of pollutants in natural water systems as well as in wastewater treatment plants. In this communication, the use of photoacoustic spectroscopy (PAS) as a new biofilm monitoring technique is presented. PAS combines features of optical spectroscopy and ultrasonic tomography and allows a depth-resolved analysis of optically and acoustically inhomogeneous media. For the first time, both biofilm and bulk liquid were monitored by photoacoustic sensor heads. In this way, sorption of suspended iron(III) oxide particles on the outer and inner surfaces of the biofilm could be observed on-line and in situ. Colloids can act as carriers of pollutants and influence stability and degradation efficiency of biofilms.

OriginalspracheEnglisch
Seiten (von - bis)1124-1129
Seitenumfang6
FachzeitschriftAnalytical and Bioanalytical Chemistry
Jahrgang375
Ausgabenummer8
DOIs
PublikationsstatusVeröffentlicht - Apr. 2003

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