Desen 30 t/h Soil Washing Plant Treats 300,000 m³ Oil-Contaminated Soil in the Middle East
How Desen Environmental's 30 t/h modular soil washing plant treated 300,000 m³ of crude oil-contaminated soil in the Middle East. Combined soil washing with bioremediation achieved successful remediation of sandy soil with 5-8% TPH.
Project Overview
In one of the largest oil-contaminated soil remediation projects undertaken by a Chinese equipment manufacturer in the Middle East, Zhengzhou Desen Environmental Technology Co., Ltd. deployed its modular skid-mounted soil washing plant to treat approximately 300,000 cubic meters of crude oil-contaminated sandy soil, with total petroleum hydrocarbon (TPH) concentrations averaging 5%–8%.
The project utilized soil washing combined with bioremediation, demonstrating Desen's ability to deliver integrated, turnkey solutions for complex oil spill remediation at an industrial scale.
Key Project Figures
| Parameter | Details |
|---|---|
| Location | Middle East |
| Total Volume | ~300,000 m³ |
| Contaminant | Crude oil (TPH 5%–8%) |
| Treatment Capacity | 25–30 tons per hour |
| Soil Type | Sandy soil |
| Technology | Soil washing + bioremediation |
| Equipment | 10th-generation modular skid-mounted soil washing system |
Technology & Process
Desen's soil washing technology uses a multi-stage wet separation process to isolate the contaminated fine fraction from clean coarse aggregates. The system comprises:
- High-efficiency scrubbing drum — removes oil coatings from sand and gravel surfaces through mechanical attrition
- Multi-stage classifying hydrocyclones — separates fine silt and clay particles where contaminants concentrate
- Chemical dosing system — enhances contaminant desorption and dissolution
- Sludge dewatering unit — press filter reduces contaminated sludge volume for final disposal
- Water treatment & recycling module — treats process water for closed-loop reuse, minimizing environmental discharge
The washed sand and gravel are verified clean through laboratory analysis and reused on-site as backfill and construction material, while the concentrated contaminants are isolated in a small-volume filter cake for controlled disposal or further bioremediation treatment.
Why Modular Skid-Mounted Design?
Desen's mobile modular approach offers significant advantages for international projects:
- Fast deployment — All modules are pre-assembled in standard shipping containers, enabling sea freight to any global destination and rapid on-site installation within days
- Flexible configuration — Modules can be reconfigured or expanded based on site-specific soil characterization and throughput requirements
- Reduced civil works — Minimal foundation and infrastructure needed, lowering overall project CAPEX
- Easy relocation — Once remediation is complete, the entire plant can be disassembled, transported, and recommissioned at a new site
Company Background
Zhengzhou Desen Environmental Technology Co., Ltd. is a National High-Tech Enterprise headquartered in Zhengzhou, Henan Province, China. With over 30 years of manufacturing heritage and a strategic pivot to environmental equipment in 2010, Desen has grown into one of China's leading providers of contaminated soil remediation solutions.
Key credentials:
- 1,000+ engineering projects completed globally
- Equipment exported to 100+ countries and regions
- Served 385+ renowned industry clients with a >98% satisfaction rate
- Delivered China's first 100+ t/h contaminated site remediation plant (Ningbo)
- Led the development of China's first industry group standard for soil washing remediation systems
- 10th-generation modular skid-mounted washing system now in production
Desen maintains long-term R&D partnerships with Zhengzhou University, Henan University of Technology, and the Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, as well as technology alliances with leading environmental enterprises from Germany and Finland.
Proven Performance Across Contaminant Types
Beyond the Middle East project, Desen's soil washing technology has been validated across a wide spectrum of contaminants and site conditions:
- Heavy metals — Lead (Pb), Arsenic (As), Mercury (Hg), Nickel (Ni), Chromium (Cr⁶⁺), with over 23 projects including a 60 t/h arsenic remediation plant in Guangzhou and a 90 t/h chromium slag site in Changsha
- Petroleum hydrocarbons (C6–C9 / C10–C40) — 180,000 m³ Ningxia project combining washing with biopile remediation, treating benzene, ethylbenzene, benzo(a)pyrene, and chloroform co-contaminants
- Chemical plant sites — Multi-contaminant complex sites, including a 90 t/h Shanghai chemical site and a 90 t/h Hunan smelting site
- Sewer & dredged sludge — Integrated modular treatment systems achieving total power 224.85 kW with only 2 operators per shift
Contact & Inquiry
For technical consultation, equipment specifications, or project quotations, please contact:
Zhengzhou Desen Environmental Technology Co., Ltd.
Address: National University Science Park, Zhengzhou High-Tech Zone, Henan, China
Phone: +86-371-61937711
Website: www.materialwashing.com | www.zzdshj.com
Email: Available via contact form on website
