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- Title
Process analysis of biofilms by photoacoustic spectroscopy.
- Authors
Schmid, T.; Helmbrecht, C.; Panne, U.; Haisch, C.; Niessner, R.
- 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.
- Subjects
BIOFILMS; MICROBIAL aggregation; MICROBIAL ecology; PHOTOACOUSTIC spectroscopy; LASER spectroscopy; WASTE products
- Publication
Analytical & Bioanalytical Chemistry, 2003, Vol 375, Issue 8, p1124
- ISSN
1618-2642
- Publication type
Article
- DOI
10.1007/s00216-002-1690-3