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Kinetics of aerob microbial degradation of aliphatic polyesters

Kinetik des aeroben mikrobiellen Abbaus von aliphatischen Polyestern
 
: Starnecker, A.; Menner, M.

Sand, W.; Kreysa, G. ; Deutsche Gesellschaft für Chemisches Apparatewesen, Chemische Technik und Biotechnologie e.V. -DECHEMA-, Frankfurt/Main:
Biodeterioration and biodegradation. Papers of the 10th International Symposium on Biodeterioration and Biodegradation
Weinheim: VCH Verlagsgesellschaft, 1996 (Dechema-Monographien 133)
ISBN: 3-527-10227-2
pp.221-228
International Symposium on Biodeterioration and Biodegradation <10, 1996, Hamburg>
English
Conference Paper
Fraunhofer ILV ( IVV) ()
Abbaukinetik; Bioabbau; bioabbaubares polymer; biodegradable polymer; biodegradation; CO2-Bildung; CO2 production; degradation kinetics; enzymatic cleavage; enzymatische polymerspaltung; polymer; test system; Testsystem

Abstract
An automated laboratory test system was developed for measuring the aerobic biodegradation kinetics of aliphatic polyesters under standardized conditions in an aqueous model system. Biodegradation kinetics was monitored by measuring microbial carbon dioxide production and oxygen consumption resulting from the degradation process. It was observed that biodegradation of P(3HB) and PCL was rate limited by the enzymatic polymer cleavage. A linear increase of the maximum degradation rate with increasing specific polymer surface area was measured. These results confirm that the enzymatic cleavage is a surface-bound process. The temperature dependency of the biodegradation rate followed the Arrhenius law within the mesophilic and thermophilic temperature range.

: http://publica.fraunhofer.de/documents/PX-20451.html