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首页> 外文期刊>Journal of Polymers and the Environment >Influence of pH and C/N Ratio on Poly(Vinyl Alcohol) Biodegradation in Mixed Bacterial Culture
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Influence of pH and C/N Ratio on Poly(Vinyl Alcohol) Biodegradation in Mixed Bacterial Culture

机译：pH和C / N比对混合细菌培养中聚乙烯醇生物降解的影响

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摘要

Cultivation conditions affecting poly(vinyl alcohol) (PVA) degradation by a mixed bacterial culture of Bacillus sp. and Curtobacterium sp. were investigated. Bacterial strains used in this study were isolated from the watercourse and the sewage sludge of vinylonfibre mill by enrichments on PVA as the sole carbon source. The results showed that PVA was greatly degraded under the following conditions: 0.5% PVA as a substrate at the initial medium pH of 8 with 0.15% glucose and urea at C/U ratio 1.5:1 and 1% bacterial inoculum, at a temperature of 35 ℃ and a shaking speed of 110 rpm. The analysis of FTIR and ~1H NMR spectra before and after biodegradation indicate fission of the PVA molecular chain during the incubation.
机译：通过芽孢杆菌混合细菌培养影响聚乙烯醇（PVA）降解的栽培条件。和弯曲杆菌属。被调查了。通过富集PVA作为唯一碳源，从乙烯基纤维厂的水道和污水污泥中分离出用于本研究的细菌菌株。结果表明，在以下条件下，PVA会大大降解：在初始培养基pH为8时，以0.1％的葡萄糖和尿素（C / U比为1.5：1）和1％的细菌接种物，在0.5的初始培养基pH值为0.5％的PVA作为底物。 35℃和110rpm的摇动速度。生物降解前后的FTIR和〜1H NMR光谱分析表明，在孵育过程中PVA分子链发生了裂变。

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