Longking EnTech Europe and MITINFRA commissioned a 160 kg/h ozone system at El Ahogado WWP (Mexico) to support NOM-001-SEMARNAT-2021 compliance.
Commissioning of a 160 kg/h Ozone System at El Ahogado WWP (Mexico) to Support NOM-001-SEMARNAT-2021 Compliance
As wastewater regulations evolve, plants increasingly require polishing technologies that can simultaneously improve multiple quality indicators—particularly those linked to disinfection performance, effluent appearance, and toxicity-related parameters.
Longking EnTech Europe has completed the commissioning of a high-capacity ozone treatment system at the El Ahogado Wastewater Plant (El Ahogado WWP) in Mexico, delivered in cooperation with MITINFRA. The system has been engineered to support compliance with NOM-001-SEMARNAT-2021, which introduces more stringent limits for wastewater discharge and reuse, including requirements on toxicity, color, and microbiological indicators.
Project at a Glance
Ozone capacity: 160 kg/h Nota El Ahogado
Architecture: four oxygen-fed industrial ozone generators, modular and staged for redundancy and load flexibility
Package scope: generation + diffusion + automation/control + off-gas destruction + cooling
Process goals: advanced disinfection, color reduction, toxicity mitigation
Integration: post-biological polishing step supporting reuse pathways
Why Ozone as a Polishing Step for Wastewater Plants
Ozone is widely used in water and wastewater treatment as a high-strength oxidant and disinfectant. In polishing applications, properly engineered ozone systems can help plants address several effluent challenges at the same time, without turning the solution into a “multi-chemical” process.
For El Ahogado WWP, the ozone system was engineered specifically to address three critical performance objectives aligned with the updated regulatory environment:
Advanced disinfection
Color reduction
Toxicity mitigation
System Capacity and Modular Architecture (160 kg/h)
The installed solution provides a total ozone production of 160 kg/h, generated through four oxygen-fed industrial ozone generators.
This modular design supports:
Staged operation: adapting ozone production to real-time process demand
Redundancy: maintaining operational resilience
Load flexibility: allowing optimization across varying influent conditions
Fully Integrated Scope of Supply (What Was Delivered)
Longking EnTech Europe delivered a fully integrated ozone package, including:
Ozone generation system (four high-frequency, oxygen-fed generators)
Diffusion systems optimized for gas–liquid mass transfer efficiency
Centralized automation and control architecture, with PID regulation, safety interlocks, and remote diagnostics
Off-gas destruction units, ensuring safe handling of unreacted ozone
Cooling system (industrial chiller and closed-loop distribution) to stabilize operation and improve power-to-ozone conversion efficiency
Engineering Notes: Where Performance Is Won (and Lost)
High ozone concentration and transfer efficiency
In ozone applications, “production capacity” is only one side of the equation. The final outcome depends strongly on transfer efficiency—how effectively ozone is dissolved into the water phase. This is why diffuser selection, hydraulics, and gas–liquid contact strategy matter as much as generator sizing.
CT (Concentration × Time): the operational backbone
The system includes a contacting concept designed to maximize CT (Concentration × Time) values.
CT is a practical way to think about oxidation/disinfection “exposure”: it links ozone concentration in the process environment and the effective contact time that the water receives.
Off-gas destruction and safety-by-design
In large ozone systems, off-gas management is not optional—it’s integral to safe operation. The integrated off-gas destruction units ensure safe and compliant handling of any unreacted ozone.
Why cooling matters in industrial ozone generation
Stable thermal operation supports stable ozone output and efficiency. The system includes an industrial chiller and closed-loop distribution, designed to maintain generator stability and improve the power-to-ozone conversion efficiency.
Automation, Monitoring, and Operational Robustness
The system incorporates:
Real-time monitoring of ORP, ozone dosage, off-gas concentration, and generator performance parameters
Automated sequences for start-up, shutdown, safety venting, and emergency handling
Integration with the existing treatment train, enabling post-biological polishing for effluent reuse pathways
This automation approach supports predictable operation, reduces operator workload, and improves consistency under variable influent conditions.
From Project to Platform: Linking the Installation to Longking’s NLO Product Strategy
Large municipal and industrial projects benefit from product platforms that are engineered for repeatability, reliability, and lifecycle support.
This installation reflects the same industrial design philosophy behind Longking’s NLO ozone generator family—a product platform developed for demanding water and wastewater applications where stability, safety architecture, and maintainability are key decision drivers.
“This installation provides El Ahogado WWP with an advanced oxidation platform engineered to meet Mexico’s new regulatory standards. The system’s architecture ensures stable ozone production, high transfer efficiency, and safe process operation under variable influent conditions,” said Javier Ezquerra, General Manager of Longking EnTech Europe.
Collaboration with MITINFRA
The project was executed jointly with MITINFRA, ensuring alignment with plant configuration, operator workflows, and regulatory auditing requirements. Longking EnTech Europe provided commissioning supervision, operator training, and ongoing technical support protocols.
Quick Technical Glossary (Value-added, reader-friendly)
ORP: operational indicator commonly used to understand oxidative conditions in the process environment.
Off-gas: ozone-containing gas stream exiting the contactor; must be treated for safety.
CT: a practical framework linking ozone “exposure” to process effectiveness.
What is the ozone capacity installed at El Ahogado WWP?
160 kg/h, produced by four oxygen-fed industrial ozone generators.
What equipment is included in the package?
Generation, diffusion, centralized automation/control, off-gas destruction, and cooling.
What are the main process objectives?
Advanced disinfection, color reduction, and toxicity mitigation.
Ozone is not the future — it’s the now. And Longking EnTech is here to help you deploy it efficiently, safely, and sustainably.
For more information, contact our commercial department at info@longkingeu.com .