Longking Completes Installation Ozone Generators System for EAST BAY Water Treatment Plant In Philippines
East Bay (Philippines): 15 kg/h LOX-Fed Ozone System for a 50,000 m³/day Drinking Water Treatment Plant (NLO Series)
Drinking water plants operating with variable raw water conditions need treatment barriers that are both powerful and controllable. At the East Bay Drinking Water Treatment Plant (Philippines), ozonation is implemented as a key oxidation and disinfection step upstream of clarification and filtration—supporting stable treated-water quality and operational resilience.
Longking EnTech Europe (formerly Newland EnTech Europe) supplied, installed and commissioned a 15 kg/h ozone generation system for the East Bay DWTP, located in the Pakil Lake area, east of Manila, with a total plant capacity of 50,000 m³/day. The treatment line combines ozonation, dissolved air flotation (DAF) and two filtration stages, forming a robust multi-barrier configuration.
Key Project Figures
Plant capacity: 50,000 m³/day
Installed ozone capacity: 15 kg/h (360 kg/day)
Ozone generators: 2 × NLO series, model 7.5K (each 180 kg/day)
Feed gas: Liquid Oxygen (LOX)
Transfer: Dome-type porous diffusers
Off-gas: Catalytic thermal destructors with PLC control
Cooling: Closed-circuit (DI water + additives), dual pumps + backup chiller for high temperature periods
Project Scope and Treatment Integration
The project included engineering and commissioning of a complete ozone system integrated into the plant’s front-end process and aligned with utility requirements for reliability and safe operation. The key objectives were:
Stable ozone production with predictable control under real operating conditions
High operational safety (gas detection, ventilation and emergency shutdown logic)
Optimised energy consumption through closed-loop regulation
Robust off-gas management to ensure safe handling of undissolved ozone
Ozone Generator Configuration (NLO Series)
The installation includes two NLO-series ozone generators (7.5K) operating on LOX. This configuration provides operational flexibility (load sharing and availability) while ensuring the required installed capacity.
Oxygen Conditioning for Stable Performance
Prior to ozone generation, oxygen is conditioned through a dedicated stage including filtration and nitrogen addition, supporting consistent operating conditions and stable ozone production.
Energy Optimisation and Closed-Loop Control
Each generator is equipped with instrumentation to monitor operating parameters and a UV spectrophotometer enabling closed-loop regulation. This approach supports stable ozone production while helping optimise power consumption and day-to-day operating cost.
Why NLO Ozone Generators for Municipal Drinking Water Projects
High-capacity municipal applications require more than ozone output—they require availability, controllability and maintainability. The NLO platform is engineered as a modular solution for drinking water and industrial projects where long-term reliability and automation are critical.
NLO Platform Highlights (Project-Relevant)
Modular architecture suitable for multi-unit layouts (availability and load management)
Designed to support high stability operation with oxygen feed strategies such as LOX (and project-dependent alternatives)
Automation-ready design for integration into plant PLC/SCADA philosophy
Instrumentation and diagnostics designed to support safe operation, troubleshooting and lifecycle service planning
Engineered with a focus on efficiency and operational robustness rather than “peak claims” that do not translate into real plant performance
Cooling Strategy for High-Temperature Operating Conditions
To preserve dielectric integrity and ensure stable long-term operation, the system uses closed-circuit cooling with deionized water and additives. Each cooling loop includes dual pumps to support continuous operation.
A backup chiller ensures stable cooling performance during periods when lake water temperature can exceed 28°C, reinforcing reliability under seasonal conditions.
Ozone Contacting and Mass Transfer
Ozone is delivered to the contactors using high-efficiency dome-type porous diffusers, supporting effective gas-liquid mixing and consistent process performance. At this scale, mass transfer and hydraulic behaviour are key contributors to real “delivered ozone” and overall efficiency.
Off-Gas Destruction, Materials and Outdoor Operation
Undissolved ozone is safely treated using catalytic thermal ozone destructors governed by a PLC, providing controlled operation and consistent safety performance.
The destructor assembly includes:
Components compatible with humid ozone gas
Outdoor-ready design, suitable for installation without dedicated shelters
A demister (drop separator) and sub-/over-pressure valves to strengthen operational safety and stability
Plant Safety Systems (Detection + Emergency Ventilation)
The ozonation building is equipped with ozone leak detection. In the event of a leak, the system triggers automatic shutdown and activates high-capacity extractors designed to evacuate the room air volume rapidly—reducing personnel risk and supporting safe maintenance practices.
Central Control and Operator Interface
All subsystems are managed through a central control panel that allows operators to supervise plant status, alarms and key parameters, and apply the required ozone dosing according to process needs.
The East Bay DWTP installation demonstrates a complete high-reliability approach to municipal ozonation: LOX-fed NLO ozone generators, energy-optimised closed-loop control, robust cooling strategy for high-temperature conditions, efficient diffusion-based contacting, PLC-governed off-gas destruction and a comprehensive safety concept.
For more information about this project or high-capacity ozone systems for drinking water treatment, please contact our technical and commercial team info@longkingeu.com .