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首页> 外文期刊>RSC Advances >Production of rhamnolipids with different proportions of mono-rhamnolipids using crude glycerol and a comparison of their application potential for oil recovery from oily sludge
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Production of rhamnolipids with different proportions of mono-rhamnolipids using crude glycerol and a comparison of their application potential for oil recovery from oily sludge

机译：使用粗甘油的不同比例的单核醇产生rhamnolipds的生产，并比较它们从油性污泥中的储存潜力的应用潜力

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摘要

The use of efficient green cleaning agents, such as biosurfactants, is important in oil sludge treatment. Enhanced oil recovery from oily sludge by different rhamnolipids was comparatively evaluated. Using crude glycerol, the wild-type strain Pseudomonas aeruginosa SG and the recombinant strains P. aeruginosa PrhlAB and P. stutzeri Rhl produced 1.98 g L-1, 2.87 g L-1 and 0.87 g L-1 of rhamnolipids, respectively. The three bacterial strains produced different rhamnolipid mixtures under the same conditions. The proportions of mono-rhamnolipids in the three rhamnolipid products were 55.92%, 94.92% and 100%, respectively. These rhamnolipid products also possessed different bioactivities. Emulsifying activity became higher as the proportion of mono-rhamnolipids increased. The three rhamnolipid products were stable at temperatures lower than 121 degrees C, pH values from 5-11 and NaCl concentrations from 0-15%. All three rhamnolipid products could recover oil from oily sludge, but oil recovery efficiency was positively related to the proportion of mono-rhamnolipids. Mono-rhamnolipids produced by the recombinant strain Rhl exhibited the best oil recovery efficiency (53.81%). The results reveal that mono-rhamnolipids are the most promising for oil recovery from oily sludge.
机译：使用高效的绿色清洁剂，如生物表面活性剂，在油污泥处理中是重要的。通过不同的鼠脂脂，从油性污泥的增强的油回收相对评价。使用粗甘油，野生型菌株假单胞菌铜绿假单胞菌和重组菌株P.铜绿假单胞菌P.Stutzeri RHL分别产生1.98g L-1,2.87g L-1和0.87g L-1的rhamnolipds。三种细菌菌株在相同条件下产生不同的耳鼻脂混合物。三种rhamnolipid产物中的单rhamnolipids的比例分别为55.92％，94.92％和100％。这些菌毒素产品也具有不同的生物活性。随着单核润滑脂的比例增加，乳化活性变得更高。在低于121℃的温度下稳定，从5-11和NaCl浓度为0-15％，三个rhamnolipid产物稳定。所有三种rhamnolipid产品都可以从油性污泥中恢复油，但恢复效率与单核脂的比例正相关。通过重组菌株RHL产生的单核脂溢性，表现出最佳的采油效率（53.81％）。结果表明，单核脂溢性是对油性污泥中的最有希望的采油。

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  • 来源
    《RSC Advances》 |2019年第6期|共7页
  • 作者

    Zhao Feng; Jiang Hao; Sun Huichun; Liu Chang; Han Siqin; Zhang Ying;

  • 作者单位

    Chinese Acad Sci CAS Key Lab Pollut Ecol &

    Environm Engn Inst Appl Ecol Shenyang 110016 Liaoning Peoples R China;

    Heilongjiang Weikaier Biotechnol Co Ltd Harbin 150025 Heilongjiang Peoples R China;

    Chinese Acad Sci CAS Key Lab Pollut Ecol &

    Environm Engn Inst Appl Ecol Shenyang 110016 Liaoning Peoples R China;

    Liaoning Univ Sch Environm Sci Shenyang 110036 Liaoning Peoples R China;

    Chinese Acad Sci CAS Key Lab Pollut Ecol &

    Environm Engn Inst Appl Ecol Shenyang 110016 Liaoning Peoples R China;

    Chinese Acad Sci CAS Key Lab Pollut Ecol &

    Environm Engn Inst Appl Ecol Shenyang 110016 Liaoning Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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