Compact 1 kg/h ozone generator strengthens drinking water pre-ozonation in Sotillo de la Adrada (Spain)
Sotillo de la Adrada upgrades drinking water treatment with high-efficiency pre-ozonation using NLO LITE small ozone units
Seasonal shifts in raw water quality can quickly translate into operational headaches: taste and odour episodes, higher oxidant demand, filtration stress, and unstable downstream performance. To make the treatment train more resilient, a drinking water pre-ozonation step has been implemented in Sotillo de la Adrada (Ávila, Spain) using a compact 1 kg/h ozone generation package designed for efficient, safe municipal operation.
At the heart of the installation is a Longking NLO LITE (NLO 1K) ozone generator, fed with oxygen produced on-site via PSA (Pressure Swing Adsorption). The unit is engineered to deliver high ozone concentration with low specific energy consumption, supporting robust oxidation performance in a small footprint—exactly what many municipalities need when space, simplicity and operating cost matter.
Why pre-ozonation in drinking water treatment?
Ozone can be applied early in the treatment train (pre-ozonation) to improve overall treatability and stability. In practice, utilities use pre-ozonation to help:
Reduce taste and odour compounds and improve organoleptic quality.
Oxidize iron and manganese (when present), facilitating subsequent removal.
Support coagulation and filtration performance by conditioning the water matrix (case-dependent).
Complement multi-barrier treatment goals, often alongside coagulation, filtration and (bio)filtration.
Important technical nuance: performance depends on water matrix, contact conditions and downstream processes—ozone is powerful, but it should be engineered as part of a complete treatment strategy.
High-efficiency ozone mixing with ceramic porous diffusers
Efficient ozonation is not only about generating ozone—it’s about transferring it into water effectively. In this project, the ozone mixing system has been implemented using high-efficiency ceramic porous diffusers, designed to increase gas–liquid interfacial area and promote more uniform distribution in the application zone.
Safety-first design for municipal operation
Ozone is a strong oxidant and must be handled with proper safeguards. The installation is equipped with the required safety systems for safe operation, including controls, interlocks and protections aligned with best practice for ozone systems in water treatment environments.
NLO LITE Series: small (compact) ozone generators built for medium-scale water applications
For municipalities and industrial sites looking for compact ozone generation without compromising performance, the NLO LITE Series provides a plug-and-play approach built on Longking’s proven reactor design.
Verified technical highlights (NLO LITE)
Capacity: 0.5–1.5 kg O₃/h (including 1.0 kg/h configurations).
Feed gas: Oxygen from PSA or LOX.
Ozone concentration: up to 296 g/Nm³ (oxygen feed).
Energy consumption: ≤ 8 kWh/kg O₃ (model/conditions dependent).
Ozone-contact materials: AISI 316L and PTFE for durability and corrosion resistance.
Cooling options: Air-cooled or water-cooled (closed-loop).
Control & automation: integrated PLC, optional HMI, safety interlocks, and Ethernet connectivity for remote data access.
These features make NLO LITE a strong candidate for pre-ozonation in drinking water, water reuse, and compact installations where operational simplicity and energy efficiency are decisive.
FAQ
What is pre-ozonation in drinking water treatment?
Pre-ozonation is the application of ozone upstream to improve treatability—often used for taste/odour control, oxidation of Mn/Fe, and to support downstream coagulation/filtration performance.
What does “1 kg/h ozone generator” mean?
It refers to the ozone production rate: the generator can produce up to 1 kilogram of ozone per hour under defined operating conditions.
Can a compact ozone generator still deliver high concentration ozone?
Yes—NLO LITE units are specified up to 296 g/Nm³ with oxygen feed.
Why use PSA oxygen for ozone generation?
PSA provides on-site oxygen supply, simplifying logistics and enabling continuous ozone production without delivered liquid oxygen (site-specific engineering applies).
For more information, contact our commercial department at info@longkingeu.com .