Microbial degradation of poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in Compost
Microbial degradation of poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate) in Compost
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DOI：
10.1007/bf02067443
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发表时间：
1994-01-01
期刊：
影响因子：
--
通讯作者：
Swings, Jean
中科院分区：
文献类型：
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作者：
Mergaert, Joris;Anderson, Caroline;Swings, Jean
在小型家庭堆肥堆中研究了由聚(3-羟基丁酸酯) (P(3HB)) 或含 10% (P(3HB-co-10% 3HV)) 和 20% (P(3HB-co-20% 3HV)) 3-羟基戊酸的共聚物制成的拉伸试件的微生物降解情况。降解通过重量损失（表面侵蚀）以及分子量和机械强度的变化来测量。根据重量损失和机械性能损失得出的结论是，P(3HB) 和 P(3HBco-3HV) 塑料在堆肥中通过微生物的作用而降解。在降解过程中未检测到 M-w 的降低。 P(3HB-co-20% 3HV) 共聚物的降解速度比均聚物和 P(3HB-co-10% 3HV) 快得多。从生物降解研究中使用的样品以及其他两种堆肥中分离并鉴定了一百九种能够在体外降解聚合物的微生物菌株。其中包括 61 种革兰氏阴性菌（如敏捷食酸菌）、10 种革兰氏阳性菌（主要是巨大芽孢杆菌）、35 种链霉菌菌株和 3 种霉菌。
The microbial degradation of tensile test pieces made of poly(3-hydroxybutyrate) (P(3HB)) or copolymers with 10% (P(3HB-co-10% 3HV)) and 20% (P(3HB-co-20% 3HV)) 3-hydroxyvaleric acid was studied in small household compost heaps. Degradation was measured through loss of weight (surface erosion) and changes in molecular weight and mechanical strength. It was concluded, on the basis of weight loss and loss of mechanical properties, that P(3HB) and P(3HBco-3HV) plastics were degraded in compost by the action of microorganisms. No decrease in M-w could be detected during the degradation process. The P(3HB-co-20% 3HV) copolymer was degraded much faster than the homopolymer and P(3HB-co-10% 3HV). One hundred nine microbial strains capable of degrading the polymers in vitro were isolated from the samples used in the biodegradation studies, as well as from two other composts, and identified. They consisted of 61 Gram-negative bacteria (e.g., Acidovorax facilis), 10 Gram-positive bacteria (mainly Bacillus megaterium), 35 Streptomyces strains, and 3 molds.