Biedermann, J. and Owen, A. J. and Schloe, K. T. and Gassner, F. and Süssmuth, R. (1997) Interaction between poly-3-hydroxybutyrate-co-3-hydroxyvalerate and a denitrifying Pseudomonas strain. CANADIAN JOURNAL OF MICROBIOLOGY, 43 (6). pp. 561-568. ISSN 0008-4166, 1480-3275
Full text not available from this repository.Abstract
In a laboratory-scale system, denitrification activity of a heterotrophic microbial starter culture changed when different lots of poly-3-hydroxybutyrate-co-3-hydroxyvalerate (P(HB-co-HV)) were used as the solid carbon source in the heterotrophic denitrification reactor. In this study, possible influences of physical and chemical properties of commercially produced P(HB-co-HV) (Biopol(R)) on biofilm formation and metabolic activity of a denitrifying starter culture were investigated. These parameters indicate the polymers' suitability for the application as the matrix substance in the bioreactor. No differences in microstructure were detected between the different lots of polymers. Growth inhibitory effects by chemical additives were found in the case of triacetine, which was included as a plasticizer in seven of eight tested lots. The amount of hydroxyvaleric acid in the polymer was not assumed to affect denitrification activity. Relevant differences could be detected regarding primary adhesion of the starter culture Pseudomonas sp. strain 2nIII. It showed good adsorption properties to hydrophobic substances with a dependence on precultivation conditions. Pseudomonas sp. strain 2nIII degraded poly-3-hydroxybutyrate acid homopolymer and P(HB-co-HV) copolymers but was unable to break up poly-3-hydroxyvaleric acid. A possible reason for these findings is the substrate specifity of the polyhydroxyalkanoate depolymerase.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | DEGRADATION; poly-3-hydroxybutyrate-co-3-hydroxyvalerate; drinking water denitrification; biofilm; microbial adsorption |
| Subjects: | 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Medizinische Mikrobiologie und Hygiene |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Apr 2023 07:47 |
| Last Modified: | 27 Apr 2023 07:47 |
| URI: | https://pred.uni-regensburg.de/id/eprint/50772 |
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