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首页> 外文期刊>Biochemical Engineering Journal >Bioremediation of n-alkanes and the formation of biofloccules by Rhodococcus erythropolis NTU-1 under various saline conditions and sea water
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Bioremediation of n-alkanes and the formation of biofloccules by Rhodococcus erythropolis NTU-1 under various saline conditions and sea water

机译：红球红球菌NTU-1在各种盐条件和海水下对正构烷烃的生物修复和生物絮凝物的形成

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摘要

From our previous report, the speedy removal of some n-alkanes or branched-alkanes by Rhodococcus erythropolis NTU-1 was already demonstrated in aqueous MS medium. Therefore, this strain was further tested under saline conditions, as well as in pure sea water. Hexadecane of 2000 ppmv was used as a model carbon source in this report. Under saline conditions, the biodegradation was again confirmed with the cell aggregates formation during the cultivation. The formation of biofloccules, trapping significant amount of alkane, provides an easy physical removal of alkane, in addition to biodegradation. At an initial NaCl concentration 1.2% and 2.4%, 80-90% removal of alkane was achieved within 56 h and 65% removal at 3.6% NaCl concentration within 68 h. Addition of 0.24g/L nutrient broth (NB) in the medium would further promote the biodegradation rate and cell aggregation phenomenon during the process and more than 80-95% removal of alkane was achieved within 56-68 h. In the case of sea water, alkane removal was about 50% after 140 h and 65% with NB addition. The results suggest that strain NTU-1 has considerable ability for the bioremediation processes of n-hexadecane in a marine environment.
机译：从我们以前的报告中，已经证明在水性MS介质中红红球菌NTU-1可以快速去除某些正构烷烃或支链烷烃。因此，该菌株在盐水条件下以及纯海水中进一步测试。本报告中使用2000 ppmv的十六烷作为模型碳源。在盐水条件下，通过培养过程中细胞聚集体的形成再次确认了生物降解。捕获大量烷烃的生物絮凝物的形成，不仅可以生物降解，还可以轻松地物理去除烷烃。在初始NaCl浓度为1.2％和2.4％的情况下，在56 h内可除去80-90％的烷烃，而在68 h内可在3.6％NaCl浓度下实现65％的烷烃去除。在培养基中添加0.24g / L的营养肉汤（NB）将进一步促进该过程中的生物降解率和细胞聚集现象，并在56-68 h内实现了80-95％以上的烷烃去除。在海水中，烷烃的去除率在140小时后约为50％，而在添加NB时约为65％。结果表明，NTU-1菌株具有在海洋环境中对正十六烷进行生物修复的能力。

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