Biosurfactant and polycyclic aromatic hydrocarbon-degrading strain enhanced compositing treatment of contaminated soil

The invention relates to a biosurfactant and a technology for remediation of contaminated soil through polycyclic aromatic hydrocarbon-degrading strain enhanced compositing treatment. Biosurfactant-producing bacteria produce the biosurfactant; the biosurfactant is extracted and separated for soil remediation; and in the remediation process, soil contaminated polycyclic aromatic hydrocarbons is uniformly mixed with organic matters to improve the organic matter content of the soil so as to facilitate composting treatment, the moisture content of the mixture is regulated, polycyclic aromatic hydrocarbon-degrading strains are inoculated in the composting material, and the biosurfactant-producing bacteria are inoculated into the composting material, or the surfactant produced by the producing bacteria is added into the composting material to improve the bioavailability of the polycyclic aromatic hydrocarbons, the removal rate of micromolecule polycyclic aromatic hydrocarbons (phenanthrene) is 100 percent after the