Promotion of Scientific and Technological Achievements | Synergistic Oxidation Technology and Equipment for Oil and COD Removal from Industrial Wastewater Edit Date：2026/05/19

Editor’s Note: The key to scientific and technological innovation lies in the implementation of results; the core of transformation and application lies in the integration of production and research. GDE consistently adheres to innovation driven development, closely focusing on industry pain points and key technical challenges related to its core businesses, precisely aligning with market demands. It has cultivated a number of high quality achievements with independent intellectual property rights and broad commercialisation prospects, and has successfully applied them in project construction. On the occasion of the 2026 National Science and Technology Activity Week, this public account is launching a [Promotion of Scientific and Technological Achievements] column to showcase cutting edge technological outcomes. We sincerely invite all sectors to join hands in building a high ground for industrial development and jointly embrace an innovative future.

 I. Technology Overview

This technology employs a novel composite catalytic packing material to catalyse and synergise an advanced oxidation system, generating strong oxidising species such as hydroxyl radicals. By utilising multiple transition metal composites and synergistic catalysis across multiple oxidation systems, it achieves highly efficient removal of oil and COD. This provides an innovative solution and equipment for the removal of oil and COD from industrial wastewater with high oil and high COD content.

Technological Innovations:

Uses heterogeneous high‑efficiency catalytic packing to catalyse multiple oxidation systems, creating synergistic effects such as ozone/Fenton‑like, ozone/sodium hypochlorite, or ozone/persulfate. The removal efficiency of oil and COD is significantly higher than that of traditional single catalytic oxidation systems.

Adopts a “pre‑oxidation + ozone catalytic oxidation” process, which removes dissolved oil while also achieving a high COD removal rate. Compared with traditional resin‑based methods for dissolved oil removal, this process has lower operating costs, does not involve Class A hazardous substances, and offers higher safety.

By adding hydrogen peroxide or sodium hypochlorite to the oxidation tower, a synergistic enhancement effect of ozone/Fenton‑like or ozone/sodium hypochlorite is formed, thereby improving oxidation efficiency.

 II. Technical Advantages

High oil and COD removal efficiency: Oil removal rate reaches 80%, COD removal rate reaches 65%.

Significant economic benefits: Compared with traditional resin adsorption systems, this technology and equipment can reduce operating costs by 20%–30%. No impurities such as iron are introduced, and the whiteness of the recovered crystalline salt at the downstream end exceeds 84%, increasing economic value.

Low catalyst deactivation: The catalytic oxidation composite packing maintains a catalytic efficiency decay rate of less than 10% after 10 repeated uses.

Clean and environmentally friendly: The treatment process does not involve Class A substances and produces no secondary pollutants.

 III. Technology Applications and Demonstration

Application Fields: Industrial wastewater treatment for oil and COD removal across multiple sectors, including coal chemical industry wastewater, pharmaceutical wastewater, textile and dyeing wastewater, lithium battery industry wastewater, fine chemicals, etc.

Demonstration Project: Influent COD: 1000–1800 mg/L, effluent: 250–600 mg/L (can be lower with increased ozone dosage); influent oil content: 10–20 mg/L, effluent: 0.85–3 mg/L.

Technical Services: Based on the water quality conditions of different industries and different clients, the types and dosages of synergistic oxidants and copolymers can be adjusted, and design parameters for different copolymerisation reactors can be selected. We provide one stop comprehensive services and solutions including consulting, design, and EPC contracting.

 IV. Intellectual Property

A P507 raffinate oil and COD removal system, Patent No.: ZL 202423048218.2

An improved oil removal device for nickel sulfate solution, Patent No.: ZL 202422745063.

 V. Contact Information

Market Manager:Zhao Changhong; Tel: 13798176650

Product Manager: Shi Jiaze; Tel: 18330820238