Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Torun, Gagarina 11, 87 100 Torun, Poland.
Department of Environmental Microbiology and Biotechnology, Faculty of Biological and Veterinary Sciences, Nicolaus Copernicus University in Torun, Gagarina 11, 87 100 Torun, Poland.
Int J Biol Macromol. 2020 Sep 15;159:539-546. doi: 10.1016/j.ijbiomac.2020.05.107. Epub 2020 May 19.
Biodegradable materials, namely pure polylactide (PLA), poly (3,4-hydroxybutyrate) (PHB), poly(ε-caprolactone) (PCL) were investigated to assess their degradability by activated sludge. The study aimed at the isolation of biofilm-forming bacteria and the determination of their hydrolytic activity toward the PLA, PHB, and PCL with embedded PHMG derivatives. The biological oxygen demand and physical properties (tensile strength, water vapor permeability, surface structure) of materials indicated that PCL was the best biodegradable film. Aeromonas and Rhodococcus isolated from the polymers' surface during the process of decomposition showed the ability to form biofilms. The introduction of PHMG derivatives into PLA, PCL, and PHB films did not affect biofilm formation and hydrolase activity for most of the isolates. PHMG derivatives at the concentration of 1% disturbed the degradation process.
可生物降解材料，即纯聚乳酸（PLA）、聚（3,4-羟基丁酸酯）（PHB）、聚（ε-己内酯）（PCL），被用来评估其在活性污泥中的可降解性。本研究旨在分离出能形成生物膜的细菌，并确定其对 PLA、PHB 和 PCL 的水解活性，这些材料中嵌入了 PHMG 衍生物。材料的生物需氧量和物理性能（拉伸强度、水蒸气透过率、表面结构）表明 PCL 是最好的可生物降解薄膜。在聚合物分解过程中从聚合物表面分离出的气单胞菌属和红球菌属具有形成生物膜的能力。将 PHMG 衍生物引入 PLA、PCL 和 PHB 薄膜中，并没有影响大多数分离菌的生物膜形成和水解酶活性。在 1%的浓度下，PHMG 衍生物会干扰降解过程。
