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Explore Desen Environmental's modular soil washing system—a scalable, configurable remediation platform for heavy metal, organic, and petroleum-contaminated soil treatment projects.

Complex contaminated sites rarely present a single, uniform pollution problem. They demand flexible remediation strategies that can adapt to varying soil types, contaminant profiles, and treatment volumes. Desen Environmental's DSLX modular washing system meets this challenge with a fully configurable, scalable platform designed for diverse soil remediation applications.

The Modular Advantage in Soil Remediation

A modular washing system consists of independent, standardized processing units that can be combined, configured, and deployed to match specific project requirements. Each module—feeding, scrubbing, classification, thickening, dewatering, water treatment—operates as a standalone unit while seamlessly integrating into a complete treatment train.

This approach delivers three critical benefits: rapid deployment with no foundation requirements and typical 15-day installation; scalable throughput from 15 to 100 tons per hour by adjusting module configuration; and multi-project reusability, as modules can be disassembled, transported, and reassembled at new sites.

System Architecture and Process Flow

The DSLX system comprises seven core modules working in sequence:

• Feed module: Hopper-type feeder with variable frequency drive for uniform material delivery and preliminary crushing of sticky soils
• Scrubbing and screening module: Rotary drum washer with high-elasticity wear-resistant liners for intensive soil particle separation, followed by primary vibrating screen classification
• Soaking and classification module: Integrated soaking tank and spiral classifier with hydrocyclone assembly for fine particle grading and extended reagent contact time
• Thickening module: Deep cone thickener utilizing gravity settling and spiral agitation for high-concentration underflow production
• Filter press module: Plate and frame filter press for final solid-liquid separation with low-moisture filter cake output
• Water treatment module: Multi-stage chemical precipitation and sedimentation system achieving closed-loop water recycling
• Control module: DCS intelligent control with 5G cloud connectivity for real-time remote monitoring and data logging

Application Versatility

The modular system handles an exceptionally wide range of contamination scenarios. For heavy metal contaminated sites—such as former smelters, electroplating facilities, and mining areas—the system employs chemical washing with appropriate extractants combined with multi-stage classification to separate clean fractions from contaminated fines.

For petroleum hydrocarbon contamination, the process incorporates thermal washing capability and oil-water separation stages. The system also addresses composite pollution where heavy metals and organic contaminants co-exist, a common scenario at former chemical plants and industrial complexes.

Beyond soil remediation, the platform extends to drilling mud treatment, shield tunneling slurry processing, river sediment dewatering, and construction mud disposal—making it a versatile asset for environmental service providers.

Proven Track Record

Desen Environmental's modular washing technology has been deployed in landmark projects across China and internationally, including the Changsha Chromium Salt Plant remediation (China's largest single-site contamination project), the Hangzhou Steel Industrial Heritage Park, and the Abu Dhabi oil-contaminated soil project. Cumulative treated volume exceeds 2 million cubic meters across all deployments.

The combination of configurable design, intelligent controls, and field-validated performance makes the DSLX modular washing system a reliable platform for organizations tackling complex soil remediation challenges at scale.