Shahi Aiyoub, Ince Bahar, Aydin Sevcan, Ince Orhan
Animal Biology Department, Faculty of Natural Science, University of Tabriz, Tabriz, Iran.
Institute of Environmental Sciences, Boğaziçi University, Bebek, 34342, Istanbul, Turkey.
Appl Microbiol Biotechnol. 2017 Jun;101(11):4341-4348. doi: 10.1007/s00253-017-8306-5. Epub 2017 May 12.
Petroleum sludge contains recalcitrant residuals. These compounds because of being toxic to humans and other organism are of the major concerns. Therefore, petroleum sludge should be safely disposed. Physicochemical methods which are used by this sector are mostly expensive and need complex devices. Bioremediation methods because of being eco-friendly and cost-effective overcome most of the limitations of physicochemical treatments. Microbial strains capable to degrade petroleum hydrocarbons are practically present in all soils and sediments and their population density increases in contact with contaminants. Bacterial strains cannot degrade alone all kinds of petroleum hydrocarbons, rather microbial consortium should collaborate with each other for degradation of petroleum hydrocarbon mixtures. Horizontal transfer of functional genes between bacteria plays an important role in increasing the metabolic potential of the microbial community. Therefore, selecting a suitable degrading gene and tracking its horizontal transfer would be a useful approach to evaluate the bioremediation process and to assess the bioremediation potential of contaminated sites.
石油污泥含有难降解的残留物。这些化合物由于对人类和其他生物有毒，是主要的关注点。因此，石油污泥应得到安全处置。该行业使用的物理化学方法大多成本高昂且需要复杂的设备。生物修复方法因其环保且具有成本效益，克服了物理化学处理的大部分局限性。能够降解石油烃的微生物菌株实际上存在于所有土壤和沉积物中，并且它们的种群密度在与污染物接触时会增加。细菌菌株不能单独降解所有种类的石油烃，而是微生物群落应相互协作以降解石油烃混合物。细菌之间功能基因的水平转移在提高微生物群落的代谢潜力方面发挥着重要作用。因此，选择合适的降解基因并追踪其水平转移将是评估生物修复过程和评估污染场地生物修复潜力的有用方法。
