[Bioremediation for petroleum-contaminated soil by composting technology]

Area of Science:

• Environmental Microbiology
• Bioremediation Technologies
• Soil Science

Context:

• Soil contamination from crude oil is a significant environmental issue, particularly in regions like the Liaohe Oil Field.
• Off-site bioremediation using composting offers a potential solution for managing petroleum-contaminated sites.
• Understanding the efficacy and key parameters of composting is crucial for successful soil cleanup.

Purpose:

• To evaluate the effectiveness of composting technology for the bioremediation of crude oil-contaminated soil.
• To identify critical factors influencing the degradation of total petroleum hydrocarbons (TPH).
• To assess the practicality and cost-effectiveness of the proposed bioremediation method.

Summary:

• Composting bioremediation of crude oil-contaminated soil using Phanerochaete chrysosporium achieved a 54.2% degradation rate of total petroleum hydrocarbons (TPH) within 55 days.
• Optimal bioremediation was influenced by oxygen and carbon dioxide content, the abundance of petroleum-degrading microorganisms, and soil pH.
• The study utilized four treatment units with specific dimensions for controlled composting experiments.

Impact:

• The developed composting treatment engineering is simple to operate and cost-effective, offering a practical solution for petroleum-contaminated soil remediation.
• Identifying key influencing factors allows for the optimization of composting conditions to maximize TPH degradation.
• This research provides a viable, low-cost technology for environmental cleanup of oil-polluted soils.