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In oilfield extraction, petroleum storage and transportation, and chemical production, oil-contaminated soil has become an increasingly serious environmental challenge. Petroleum hydrocarbons strongly adhere to soil particles and are difficult to degrade naturally, damaging soil structure and potent

In oilfield extraction, petroleum storage and transportation, and chemical production, oil-contaminated soil has become an increasingly serious environmental challenge. Petroleum hydrocarbons strongly adhere to soil particles and are difficult to degrade naturally, damaging soil structure and potentially contaminating groundwater through infiltration—posing risks to both ecosystems and human health.

Traditional treatment methods often suffer from incomplete remediation, secondary pollution, and low efficiency. To address these challenges, Desen Environment has developed an advanced oil-contaminated soil washing system, purpose-built for efficient, safe, and resource-oriented soil remediation.

Advanced Technology for Effective Soil Remediation

Desen’s system is engineered with cutting-edge technology to deliver reliable and high-performance treatment:

• Modular Integrated Design
  Compact structure with a small footprint, no need for complex civil construction, enabling fast installation and flexible relocation across oilfields, chemical plants, and industrial sites

• Targeted Washing Process
  Combines chemical washing with high-intensity mechanical scrubbing to effectively remove oil contaminants from soil particles, ensuring treated soil meets reuse and backfill standards

• Closed-Loop Water Recycling System
  Wastewater is treated and reused within the system, achieving over 95% water recycling efficiency with zero discharge, eliminating secondary pollution

• Wide Material Compatibility
  Suitable for oil sludge, tank-bottom sludge, and soils with varying particle sizes and contamination levels—without frequent parameter adjustments

• Durable & Intelligent Operation
  Built with wear-resistant and corrosion-resistant components for stable, long-term operation with low failure rates
  Equipped with an intelligent control system for easy operation and reduced labor requirements

High Efficiency with Resource Recovery

The system not only ensures effective remediation but also enables oil recovery from contaminated materials, turning waste into valuable resources. Its high processing capacity makes it ideal for large-scale environmental projects, balancing environmental performance with economic benefits.

Proven Performance in Large-Scale Projects

Desen’s oil-contaminated soil washing system has been successfully applied in the Changqing Oilfield project in Ningxia, one of the largest oil-contaminated soil remediation projects in China.

• Efficiently processed large volumes of contaminated soil

• Achieved contaminant levels well below national standards (verified by third-party testing)

• Successfully passed project acceptance

• Enabled both ecological restoration and oil resource recovery

A Benchmark Solution for Oil-Contaminated Soil Treatment

With its proven reliability, high efficiency, and eco-friendly design, Desen’s oil-contaminated soil washing system has become a benchmark solution in the industry.

It provides a powerful, practical approach to achieving harmless treatment, resource recovery, and sustainable environmental protection—helping oil and chemical enterprises meet regulatory requirements while improving operational value.