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Explore modular soil washing remediation systems by Desen Environmental. Scalable from 15 to 100 TPH, these systems handle heavy metal and hydrocarbon contamination with >90% water recycling.

Large-scale contaminated site remediation demands equipment that balances throughput capacity with operational flexibility. Fixed-plant solutions require substantial upfront investment and lengthy construction timelines, while purely mobile units may not deliver the volume needed for mega-projects. Modular soil washing systems bridge this gap — offering the scalability of fixed plants with the adaptability of mobile equipment.

What Makes a Modular System Different

Desen Environmental's DSLX series modular soil washing remediation system breaks the complete treatment line into standardized, pre-fabricated modules that connect rapidly on site. A typical 30 TPH configuration includes feeding, scrubbing, classification, thickening, filter pressing, water treatment, and electrical control modules — all designed for plug-and-play interconnection.

The modular architecture enables project owners to configure capacity precisely to project requirements, from 15 to 100 tons per hour. When project scope changes, modules can be added without redesigning the entire line. Installation and commissioning typically complete within 15 days, compared to months for conventional fixed plants.

Process Flow for Heavy Metal and Composite Contamination

The modular system handles diverse contaminant types through a multi-stage treatment chain. Contaminated soil first passes through a pre-screening feeder that removes oversized debris while dosing water and chemical agents. A rotary drum scrubber then applies intense mechanical friction, liberating contaminants from soil particle surfaces.

The slurry flows into a high-efficiency soaking and classification module — a key innovation that integrates long-duration chemical soaking with multi-stage gravity and hydraulic classification:

• Coarse stones (>2mm): Cleaned and stockpiled for construction reuse
• Medium sand (0.15–2mm): Polished through spiral classifiers and dewatering screens
• Fine particles (<0.15mm): Concentrated in deep-cone thickeners and dewatered by filter presses

Contaminated fine fraction is isolated in the filter cake stream for targeted disposal or secondary treatment, while clean coarse and medium fractions are verified and reused. This "clean fraction recovery, contaminated fraction concentration" strategy minimizes disposal volume and costs.

Intelligent Control and Environmental Compliance

Every module operates under a unified DCS (Distributed Control System) with 5G IoT connectivity, enabling real-time remote monitoring of throughput, water quality, power consumption, and equipment status. The water treatment module automatically adjusts chemical dosing based on influent quality, maintaining closed-loop recycling at rates above 90% and near-zero liquid discharge.

Proven Performance Across Major Projects

Desen Environmental's modular systems have been deployed in landmark remediation projects including the Changsha Chromium Salt Plant (China's largest single-site remediation), Hangzhou Steel Industrial Heritage Park, and multiple petroleum-contaminated site projects in the UAE. Cumulative treated soil volume exceeds two million cubic meters, with cooperative engineering partners spanning dozens of top-tier environmental firms.

For EPC contractors, government agencies, and industrial site owners, modular soil washing systems deliver the ideal combination of high throughput, rapid deployment, and environmental compliance — making them the preferred choice for large-scale soil remediation worldwide.