Case Analysis of Ozone Generation Systems in Industrial Wastewater Treatment
2026 Ozone Generation System Industrial Wastewater Treatment Industry Case Analysis — Technical Insights from Shandong Zhonghui Environmental Protection
This article focuses on the practical application of ozone generation systems in the field of industrial wastewater treatment. Based on two real industry cases implemented by Shandong Zhonghui Environmental Protection, it analyzes project requirements, solution design, and operational performance from multiple dimensions, compares the differences between different technical solutions, summarizes selection steps, answers common questions, and provides practical references for industry practitioners.
An ozone generation system is an integrated environmental protection equipment system that produces and outputs ozone gas. In the field of industrial wastewater treatment, ozone generation systems have become one of the core pieces of equipment for treating refractory organic wastewater thanks to their strong oxidizing properties. As a domestic industrial wastewater treatment service provider specializing in ozone technology, Shandong Zhonghui Environmental Protection has provided mature ozone generation system solutions for dozens of industry projects. This article presents an analysis based on real industry cases.
Currently, domestic industrial wastewater discharge requirements are continuously rising. In many industries, even after conventional biochemical treatment, wastewater still suffers from problems such as refractory COD and excessive chromaticity, failing to meet discharge or reuse standards. The ozone produced by ozone generation systems has strong oxidizing power, which can break the molecular chains of refractory organic compounds, improve wastewater biodegradability, and remove chromaticity at the same time, making it one of the most mature solutions for advanced treatment stages.
Against the backdrop of the dual-carbon goals, industrial enterprises are placing ever-higher demands on the energy consumption and operating costs of environmental protection equipment, and ozone generation systems are developing toward modularity, intelligence, and low energy consumption. Shandong Zhonghui Environmental Protection's ozone generation system features a discharge structure optimized for industrial wastewater treatment scenarios, reducing energy consumption by about 15% at the same ozone output, in line with the industry's current low-carbon development needs.
A medium-sized printing and dyeing enterprise in Liaocheng, Shandong, discharges 1,200 tons of printing and dyeing wastewater per day. Even after the effluent from the original biochemical treatment process stabilized, COD remained between 110–130 mg/L with a chromaticity of about 80 times, while local discharge requirements stipulate COD ≤ 50 mg/L and chromaticity ≤ 10 times. The original process could not meet the requirements, so a new advanced treatment unit was needed, and the enterprise planned to introduce an ozone generation system for the upgrade.
After water quality testing and on-site surveys, Shandong Zhonghui Environmental Protection configured a large 10 kg/h integrated ozone generation system for the project, connected to the sedimentation tank of the original biochemical effluent. After the upgrade was completed, continuous effluent monitoring over 3 months showed COD stabilized between 38–45 mg/L and chromaticity reduced to 3–6 times, fully meeting local discharge standards. Operating costs were about RMB 0.58 per ton of water, far below the owner's pre-set budget of RMB 1 per ton.
A prepared-dish processing enterprise in Weifang treats 300 tons of wastewater per day. With the original process, ammonia nitrogen and total phosphorus in the effluent could meet standards, but COD fluctuated considerably depending on raw materials, often varying between 60–90 mg/L and occasionally exceeding the 50 mg/L discharge limit, resulting in more than RMB 100,000 in excess-discharge fines per year. The owner hoped to add a small ozone generation system to stabilize the effluent COD index.
Shandong Zhonghui Environmental Protection designed a 3 kg/h modular ozone generation system for the project, connected directly to the end of the original process, requiring no new plant building, with the equipment occupying only 7.5 square meters. In the more than half a year since commissioning, effluent COD has remained consistently below 50 mg/L, with an average concentration of 36 mg/L. The equipment runs fully automatically without dedicated personnel on duty. The owner's original concern about operating costs was dispelled: actual accounting showed the treatment cost was only RMB 0.42 per ton of water, far lower than the expenditure on excess-discharge fines.
At present, ozone generation systems commonly used in industrial wastewater treatment are divided, by gas source, into air-source and oxygen-source ozone generation systems; and, by discharge unit, into tubular discharge and plate discharge types. Different technical solutions have their own advantages and disadvantages and should be selected according to actual project conditions.
To select a suitable ozone generation system, preliminary survey and evaluation must first be completed: Step one is to test the raw water inlet quality, clarify discharge requirements, and understand the pollutant loads to be removed; step two is to measure the available site area to determine the installation method of the ozone generation system; step three is to assess the owner's budget range to determine the technical route direction.
Based on Shandong Zhonghui Environmental Protection's many years of project experience, professional preliminary surveys can greatly reduce the risk of failures during the later operation of ozone generation systems, improve treatment performance, and help enterprises control long-term operating costs. As of 2026, all ozone generation system projects delivered by Shandong Zhonghui Environmental Protection have achieved an operational stability rate above 98%.