Innovative CDFU Technology for Efficient Industrial Oily Wastewater Treatment

In the context of increasingly stringent environmental regulations, effective treatment of industrial oily wastewater has become a critical challenge. Shenzhen Clear Science & Technology Co., Ltd (SINOKLE) offers a highly efficient and environmentally friendly solution through its innovative Cyclonic Dissolved-gas Flotation (CDFU) technology.

Technology Overview

The CDFU device, developed by SINOKLE with proprietary technology, integrates advanced processes such as cyclonic centrifugal separation, micro-bubble generation, and dissolved-gas flotation. This system achieves rapid and thorough separation of floating oil, emulsified oil, and suspended solids. Its modular skid-mounted design reduces space requirements, simplifies installation, and shortens project timelines.

Operating Principle

The core of this technology is the injection of micro-bubbles into the wastewater. These bubbles collide with dispersed oil droplets and suspended particles, forming aggregates with a lower apparent density than water, which float to the surface for removal. Additionally, the internal cyclone structure generates centrifugal force, enhancing the agglomeration and removal of contaminants. This all-physical demulsification method operates stably and efficiently, completely avoiding chemical additives and reducing the risk of secondary pollution.

CDFU Performance Compared to Conventional Technologies

The CDFU system offers significant advantages over traditional dissolved air flotation (DAF) technology: 

· Higher Efficiency: The hydraulic retention time is less than 5 minutes, just 1/8 to 1/3 of traditional methods.

· Superior Separation: Single-stage equipment removes over 90% of oil and more than 80% of suspended solids, outperforming traditional technologies (60%-85% oil removal and 50%-70% solids removal).

· Environmental Safety: The system operates in a fully enclosed pressurized environment, preventing odors and VOCs’ leaking.

· High Automation: It supports remote monitoring and fully automated, unattended operation, reducing labor and maintenance costs.

CDFU Industrial Application Cases

At a large petrochemical facility, SINOKLE's CDFU system was introduced to address the oily wastewater treatment challenge. The equipment, with a design capacity of 200 m³/h, features a compact, skid-mounted design for easy installation and quick deployment.

Once in operation, the system quickly reduced the oil concentration in the influent from more than 1,000 mg/L to below 10 mg/L. Suspended solids also decreased significantly, and the effluent quality met the required discharge or subsequent treatment standards.

The successful application of CDFU technology has proven its efficiency and reliability in treating complex oily wastewater, bringing tangible economic and management benefits:

· Cost Savings: The efficient physical separation reduces chemical consumption and sludge handling costs.

· Improved Management Efficiency: High automation reduces operational and maintenance burdens, enabling smart management.

· Industry Leadership: The project has set a benchmark in the petrochemical industry, with SINOKLE’s CDFU system becoming the preferred solution for oily wastewater pretreatment in many companies.

SINOKLE's CDFU technology continues to provide strong support for industrial oily wastewater treatment, creating lasting value for clients in environmental compliance and sustainable development.