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Chemical plant brownfields—contaminated with heavy metals and persistent organics (PAHs, solvents)—are valuable urban land waiting to be reused (as parks, commercial centers, or housing). But traditional ex-situ remediation slows redevelopment: fixed facilities take 15–30 days to build, and singl

Chemical plant brownfields—contaminated with heavy metals and persistent organics (PAHs, solvents)—are valuable urban land waiting to be reused (as parks, commercial centers, or housing). But traditional ex-situ remediation slows redevelopment: fixed facilities take 15–30 days to build, and single-function systems struggle with mixed pollutants. For developers on tight deadlines, these delays can derail projects and increase costs.  

Desen’s ex-situ soil washing equipment solves this with a **modular, plug-and-play design** that cuts setup time to 5 days. The system includes five skid-mounted modules: soil crushing (breaks caked soil to ≤20 mm), chemical mixing (injects solvents for organics + chelating agents for metals), multi-stage screening (separates clean soil from contaminants), solid-liquid separation (centrifuge extracts pollutants), and water recycling (purifies wastewater for reuse). Modules can be added or removed based on pollution type—e.g., an extra solvent module for high organic contamination.  

Precision and speed are its strengths. Real-time sensors monitor pollutant levels, adjusting chemical dosages to achieve 90%+ removal rates. A Guangdong pesticide factory case highlights results: the equipment treated 20,000 cubic meters of soil in 3 months, reducing cadmium from 8 mg/kg to 0.8 mg/kg and lindane (a toxic pesticide) from 0.5 mg/kg to 0.02 mg/kg. Clean soil was used to build a community park, and the project finished 6 weeks early—letting the developer launch the park 2 months ahead of schedule.