Bouregreg DWP (Morocco): 100 kg/h Ozone System Commissioned
Bouregreg DWP (Rabat, Morocco): 100 kg/h LOX-Fed Ozone Generator System with CFD-Optimized Contacting
(NLO Series)
The Bouregreg Drinking Water Plant (DWP), located in Rabat, Morocco, is a strategic facility supplying major urban areas including Rabat, Casablanca and Salé. With a treatment capacity reported at up to 1,000,000 m³/day, the plant requires highly reliable process barriers and robust automation to ensure stable drinking water quality at utility scale.
Longking EnTech Europe (formerly Newland EnTech Europe) was awarded the turnkey installation of a high-capacity ozonation solution to strengthen the plant’s treatment train and optimize water quality through controlled pre-oxidation at the headworks.
Key Project Figures
Application: Municipal drinking water (pre-oxidation at plant inlet)
Total ozone capacity: 100 kg/h
Ozone generators: 3 × NLO Series, model 30K
Feed gas: Liquid oxygen (LOX)
Ozone contacting: 9 contact chambers with dedicated dosing control
Hydraulic optimization: CFD-based contact chamber design
Transfer technology: High-efficiency dome-type porous diffusers
Off-gas treatment: Catalytic thermal ozone destructors, PLC controlled
Safety: Gas leak detection + automatic shutdown + emergency ventilation
Ozonation Strategy at the Plant Headworks
In Bouregreg, the generated ozone is injected into nine contact chambers located at the plant inlet, where pre-oxidation takes place. This approach supports a stable and controllable oxidation step before downstream unit operations.
To ensure operational flexibility and consistent performance, an automatic dosing system was installed for each of the nine mixing chambers, enabling operators to apply the exact dose required under varying raw water conditions and flow regimes.
High-Capacity Ozone Generation — NLO Series (30K Platform)
The ozone generation system is based on three NLO series ozone generators (model 30K) with a combined installed capacity of 100 kg/h, operating on LOX feed gas.
Oxygen Conditioning for Stable Ozone Production
Before entering the generators, oxygen is conditioned through a dedicated stage including:
Filtration, and
Nitrogen addition,
to support stable ozone production and consistent operating conditions.
Safety-by-Design and Energy Control
The ozone generators include discharge tubes with enhanced safety systems for dielectric protection, and an energy consumption control system designed to support stable output and efficient operation.
Each generator includes a full instrument set for monitoring operational parameters and a UV spectrophotometer, enabling a regulation loop that helps optimize energy consumption and reduce operating costs.
Thermal Management and Continuous Operation Reliability
Ozone generation is an exothermic process, producing heat that must be controlled to preserve long-term equipment durability. In Bouregreg, the system uses closed-circuit cooling, fed with deionized water with additives, supporting materials protection and stable performance.
Each cooling system incorporates dual pumps, reinforcing uptime and ensuring continuous system operation in a utility-scale environment.
Ozone Transfer to Water — Diffusers and Mixing
Ozone transfer is achieved using high-efficiency dome-type porous diffusers, designed to promote effective gas dispersion and mixing in the contact chambers. Transfer efficiency is a critical part of “real performance”, because the treatment value depends on how effectively ozone is delivered to the water phase—not only on nameplate production.
CFD-Optimized Contact Chamber Design
To maximize the efficiency of the ozonation stage, the contact chambers were designed using Computational Fluid Dynamics (CFD) techniques. This engineering approach supports:
improved hydraulic behavior and mixing patterns,
reduced short-circuiting risk, and
better overall stage efficiency under real operating conditions.
This is a key differentiator in large installations: contactor performance is often the determining factor for consistent results.
Off-Gas Ozone Destruction — Outdoor-Ready, PLC-Controlled
To safely handle undissolved ozone, the project includes catalytic thermal ozone destructors, controlled by PLCs to ensure structured process control and reliable operation.
The air preheating and temperature control system is built with components compatible with humid ozone gas, supporting long-term durability. The destructor construction allows outdoor installation and operation, without the need for housing units.
Additional protection elements integrated into the destruction systems include:
a demister / droplet separator, and
a pressure relief valve,
reinforcing stability and safety across operating modes.
Plant Safety Systems — Detection, Shutdown and Emergency Ventilation
Safety is fundamental in ozonation. The ozonation building is equipped with modern gas leak detection systems. In the event of an ozone leak:
the plant triggers automatic shutdown, and
a set of air extractors activates to evacuate the room air volume within seconds.
This safety concept supports operator protection and safe maintenance practices.
Central Control and Operator Interface
The entire ozone installation is controlled from a central control panel, enabling operators to monitor all plant components, alarms, and key parameters, and apply the exact dosing required for stable operation.
Why This Reference Matters
Bouregreg is a high-capacity, high-visibility municipal drinking water plant. Delivering a 100 kg/h ozonation system with engineered contacting (CFD), automated dosing across multiple contact chambers, robust cooling, PLC-controlled destruction and comprehensive safety systems represents a major utility-scale reference for Longking EnTech Europe.
It demonstrates not only ozone production capacity, but the complete engineering approach required for reliable municipal operations at scale.
For more information about the Bouregreg project or high-capacity ozone generator systems for drinking water, please contact our technical and commercial team: