How Bok Pig Farm in South Korea Achieved COD Below 30 mg/L with Primozone Ozone Technology
Livestock farming plays a vital role in economic growth across Asia, providing essential resources such as manure, fertiliser, and fuel. Beyond its contribution to rural livelihoods and food security, the livestock industry drives agricultural development and local economies.
However, the sector faces increasing environmental challenges, especially from the discharge of untreated livestock wastewater. This wastewater can pollute rivers and groundwater, degrade soil quality, and threaten local biodiversity — making ozone livestock wastewater treatment a critical innovation for sustainable agriculture.
Understanding Livestock Wastewater Characteristics
Livestock wastewater contains high levels of organic matter, nitrogen, suspended solids, and elevated COD (Chemical Oxygen Demand) and BOD (Biochemical Oxygen Demand).
A typical pig or cattle farm produces large volumes of wastewater daily. When released without treatment, it contaminates surface and groundwater, harms aquatic life, and reduces soil fertility.
To mitigate these impacts, farms are increasingly adopting advanced wastewater treatment systems that utilise ozone technology for chemical-free, sustainable water purification.
The Objective: Efficient and Chemical-Free COD Reduction
The main objective in livestock wastewater management is to reduce COD to safe levels before discharge.
For this Primozone client, the goal was to lower COD from 400 mg/L to below 30 mg/L, ensuring environmentally safe discharge and supporting sustainable farm operations. Achieving this without chemical additives is vital for farms focused on eco-friendly livestock management and regulatory compliance.
The Primozone Solution: Ozone Livestock Wastewater Treatment Systems
To reach these targets, Primozone implemented a fully ozone-based wastewater treatment system that delivers high oxidation efficiency without chemicals.
Installed Primozone Equipment:
- GM18 Ozone Generator – Provides high-efficiency ozone production for wastewater oxidation.
- PAOR Recirculation System – Maximises ozone dissolution, ensuring consistent COD reduction.
- PSA System – Delivers pure oxygen to sustain optimal ozone generation.
Together, these systems create a chemical-free wastewater treatment process that improves environmental outcomes and operational performance.
Case Study: Bok Pig Farm, Cheongyang, South Korea
Located near Cheongyang, South Korea, Bok Pig Farm is home to up to 5,000 pigs and operates under a strict zero-antibiotics policy, feeding pigs only natural ingredients such as corn.
Each pig grows from 30 kg to 100 kg in about three months, producing approximately 20 m³ of wastewater daily with an initial COD of 400 mg/L.
While South Korea’s Ministry of Environment allows a maximum discharge COD of 50 mg/L, Bok Pig Farm set a higher internal standard—below 30 mg/L—which it achieved through Primozone’s ozone livestock wastewater treatment technology.
Why Ozone Technology Excels in Livestock Wastewater Treatment
Ozone is one of the most effective oxidising agents for wastewater purification. It breaks down organic contaminants, odours, and pathogens without introducing harmful chemicals into the environment.
At Bok Pig Farm, wastewater undergoes conventional pre-treatment followed by advanced membrane filtration to remove solids and nitrogen. The final ozone oxidation step—powered by Primozone—completes purification, ensuring a safe, eco-friendly discharge.
Proven Results of Ozone Livestock Wastewater Treatment
- COD reduction from 400 mg/L to below 30 mg/L
- Chemical-free and eco-friendly wastewater treatment
- Improved compliance with environmental standards
- Sustainable and scalable for pig and livestock farms
This approach demonstrates how ozone livestock wastewater treatment provides both environmental protection and economic efficiency for modern livestock operations.
Conclusion
As sustainable livestock production becomes a global priority, ozone wastewater treatment systems offer a clean, effective, and chemical-free solution to one of farming’s most pressing environmental challenges.
The success of Bok Pig Farm highlights how ozone technology in livestock wastewater treatment can transform agricultural sustainability—protecting natural ecosystems while supporting profitable, responsible livestock management. If you’d like to learn more about this solution, please do not hesitate to get in touch with a member of our team.
