Production of polyhydroxyalkanoates by halotolerant bacteria with volatile fatty acids from food waste as carbon source.,Biotechnology and Applied Biochemistry

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Production of polyhydroxyalkanoates by halotolerant bacteria with volatile fatty acids from food waste as carbon source.
Biotechnology and Applied Biochemistry ( IF 3.2 ) Pub Date : 2019-11-08 , DOI: 10.1002/bab.1848
Pan Wang ₁ , Xi Teng Chen ₁ , Yin Quan Qiu _{1,

2} , Xiao Fei Liang ₁ , Meng Meng Cheng ₁ , Yong Jing Wang ₁ , Lian Hai Ren ₁

Affiliation

In this study, a halotolerant strain was isolated from high salinity leachate and identified as Bacillus cereus NT‐3. It can produce a high concentration of polyhydroxyalkanoates (PHAs) with no significant changes when NaCl concentration is up to 50 g/L. FTIR and NMR spectra of PHAs synthesized by Bacillus cereus NT‐3 were similar to the standard or previous results. Effluent from acidogenic fermentation of food waste and pure volatile fatty acids (VFAs) mixture was used as carbon source to check the effect of non‐VFAs compounds of the effluent on PHAs production. The maximum PHAs production was 0.42 g/L for effluent fermentation, whereas it was 0.34 g/L for pure VFAs fermentation, indicating that bacteria could use actual effluent in a better way. Furthermore, a mathematical model was established for describing kinetic behavior of bacteria using different carbon sources. These results provided a promising approach for PHAs biosynthesis with a low‐cost carbon source.

中文翻译：

含卤素的细菌通过含油的挥发性脂肪酸生产食盐细菌作为碳源来生产聚羟基链烷酸酯。

在这项研究中，从高盐渗滤液中分离出了一种耐盐菌菌株，并将其鉴定为蜡状芽孢杆菌NT-3。当NaCl浓度高达50 g / L时，它可以产生高浓度的聚羟基链烷酸酯（PHA），而没有明显变化。蜡状芽孢杆菌合成的PHA的FTIR和NMR谱NT-3与标准或以前的结果相似。餐厨垃圾的产酸发酵产生的废水和纯挥发性脂肪酸（VFA）混合物被用作碳源，以检查废水中非VFAs化合物对PHAs生产的影响。废水发酵的最大PHAs产量为0.42 g / L，而纯VFA发酵的最大PHAs产量为0.34 g / L，表明细菌可以更好地利用实际废水。此外，建立了一个数学模型来描述使用不同碳源的细菌的动力学行为。这些结果为利用低成本碳源进行PHAs生物合成提供了一种有前途的方法。

更新日期：2019-11-08

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