Journal
POLYMER DEGRADATION AND STABILITY
Volume 94, Issue 8, Pages 1190-1196Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2009.04.013
Keywords
Aliphatic-aromatic copolyester; PBAT; Biodegradation; Fungus; Mesophilic; Mineralization
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Funding
- Ministry for Education, Culture, Sports, Science, and Technology (Japan) [20510090]
- Japan Science and Technology (JST)
- Grants-in-Aid for Scientific Research [20510090] Funding Source: KAKEN
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We isolated 5 mesophilic microorganisms that form clear zones around the colony on an opaque medium containing the aliphatic-aromatic copolyester poly(60 mol% butylene adipate-co-40 mol% butylene terephthalate) (PBAT). Among all strains, the fungal strain NKCM 1712 degraded PBAT at the fastest rate (3.5 +/- 0.3 mu g cm(-2) h(-1)). Genetic and morphological analyses revealed that this strain was closely related to Isaria fumosorosea (phylum Ascomycota). Mass spectroscopic analysis revealed that the degradation products were T, AB, TB, BAB, and ABT (T, terephthalic acid unit; A, adipic acid unit; B, 1,4-butanediol unit) in the culture of the strain that used PBAT as the sole carbon source. Furthermore, the PBAT degradation ability of this strain in terms of BOD suggested that it could utilize the PBAT degradation products as growth substrates. This is the first report of a mesophilic strain that can mineralize an aliphatic-aromatic polyester into carbon dioxide on its own. (C) 2009 Elsevier Ltd. All rights reserved.
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