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首页> 外文期刊>Journal of Hazardous Materials >Sequential biowashing-biopile processes for remediation of crude oil contaminated soil in Kuwait
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Sequential biowashing-biopile processes for remediation of crude oil contaminated soil in Kuwait

机译：顺序生物洗涤-生物堆过程修复科威特原油污染的土壤

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The application of biological processes for remediation of the aged crude oil-contaminated soil of Kuwait can be an inefficient way, thus, this study developed 20 d-sequential biowashing and biopile processes where the biowashing step uses an enrichment culture of the indigenous soil bacterial community and the biopile step includes hemoglobin-catalyzed oxidation (HCO). The residual total petroleum hydrocarbons (TPH) concentrations and CO2 generation were measured to determine the removal efficiency, and the bacterial community changes were studied to investigate the effect of the sequential processes on the soil indigenous bacterial community. The enrichment culture grown on hemoglobin showed an increased surface activity, and this promoted desorption and emulsification of crude oil from the soil sample in the biowashing step resulting in 75% TPH removal. Potential surfactant-producing bacterial species were observed in the soil sample after biowashing. The HCO in the beginning of the biopile step removed 21% of the residual TPH, and further TPH removal was observed with a longer biopile period. Overall, the sequential biowashing and biopile processes removed 86% TPH. The results show that the developed sequential biowashing and biopile processes can be used to efficiently remediate the aged crude oil-contaminated soil of Kuwait.
机译：应用生物方法来修复科威特老化的原油污染土壤可能是一种无效的方法，因此，本研究开发了20 d顺序的生物洗涤和生物堆工艺，其中生物洗涤步骤使用了本地土壤细菌群落的富集培养生物堆步骤包括血红蛋白催化氧化（HCO）。测量残留的总石油烃（TPH）浓度和CO2的产生，以确定去除效率，并研究细菌群落的变化，以研究顺序过程对土壤原生细菌群落的影响。在血红蛋白上生长的富集培养物显示出增加的表面活性，并且在生物洗涤步骤中促进了土壤样品中原油的解吸和乳化，从而去除了75％的TPH。生物洗涤后，在土壤样品中观察到潜在的产生表面活性剂的细菌种类。在生物堆步骤开始时的HCO去除了21％的残留TPH，并且在更长的生物堆期间观察到了进一步的TPH去除。总体而言，顺序的生物洗涤和生物堆过程去除了86％的TPH。结果表明，已开发的顺序生物洗涤和生物堆方法可用于有效修复科威特的原油污染的老化土壤。

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