Steam-treatment-based soil remediation promotes heat-tolerant, potentially pathogenic microbiota

摘要: We investigated microbiota in surface and subsurface soil from a site, above steam-treated deep sub-soil originally contaminated with chlorinated solvents. During the steam treatment, reached temperatures c. 30°C higher than temperature untreated soil; whereas soil, at depth of about 40 cm, 45°C soil. The was examined prior to, during, 6, 12, 14, 20 31 months after treatment. Numbers bacteria cultivable 42°C increased significantly Similarly, substrate utilization ECOLOG plates, incubated 42°C, less 10% available carbon sources to more 60% Aspergillus fumigatus quantified as an example heat-tolerant fungi normally found compost. These organisms are rarely detected Danish soils but high numbers (c. 105 hyphal forming units g−1) occurred treated soil...