Newland supplies Ozone Generators System for Santillana Drinking Water Plant in Spain

Newland EnTech Europe has been awarded the installation of two ozone generators systems for Santillana DWP in Madrid, Spain.

In the summer of 2021, Newland was awarded the contract for the supply, installation and commissioning of one of the largest ozone facilities in Spain.

The owner of the facility, Canal de Isabel II, put out to tender the upgrade of the existing ozonation installation at the Santillana water treatment plant.

Santillana DWP is located in the Madrid town of Manzanares El Real, about 300 meters from the reservoir that bears its name, whose construction dates back to 1972. Throughout its history, the plant has undergone numerous modifications in its treatment line to adapt it to changes in the quality of the water in the reservoir.

With a treatment capacity of 4 m3/sg, Santillana DWP has a modern water treatment line adapted to the new regulations, highlighting ozonation, activated carbon filtration and advanced oxidation processes.

Santillana DWP has been a pioneer in the use of ozone as a disinfectant in water treatment since the 1980s. The old installation consisted of low frequency generators using dry air in a post-ozonization stage. Subsequently, the facility was expanded with the construction of a pre-ozonization with ozone generators using liquid oxygen.

In 2021, it was planned to build a centralized generation system capable of supplying ozone to both pre-ozonization and intermediate ozonization, taking into account future increases in water flow rates.

For this task, Newland Entech Europe prepared an implementation project, which not only fulfilled the expectations of ozone dosing, but also represented a saving in terms of energy consumption.

Our project consisted in the implementation of 3 NLO series generation units, each capable of producing 30 kg/h at 10% concentration and with specific consumptions of less than 7.5 Kw per kilogram of ozone.

These generators incorporate the latest generation of frequency converters based on IGBT technology, which favors excellent energy yields.

The implementation works had to include the adaptation of the installation to the existing site and a detailed study of the contact chambers through fluid dynamic simulations (CFD). These studies resulted in modifications to the existing preozonation chamber designs that did not meet sufficient transfer guarantees.

With the modifications made to the contact chambers, the transfer of ozone to the water was optimized and a notable improvement in the actual retention times was obtained by increasing the baffle effect.

The final design incorporated additional ozone safety features such as high-capacity ozone destructors and relief valves in the contact chambers. 

These destructors incorporate the latest technology in catalysts for ozone decomposition and are equipped with PLC control and touch screen where their operation can be closely monitored.

The ozone destruction installation is complemented with liquid collection tanks and demister to prevent water, drops or condensate from entering the destruction system.

Due to the low temperatures at the plant during the winter season, the ozone destruction systems were equipped with heating elements that allow them to reach operating temperatures in just a few minutes.

The cooling of the ozone generation equipment has been designed based on SRIC type closed systems, which incorporate two water circuits.

The first is the closed cooling circuit of the ozone generator, which is filled with demineralized water with additives to preserve it from possible alterations. This circuit has two recirculation pumps, one of them in reserve, to provide a permanent flow of water to the generator cooling system. Flow rates, pressures and temperatures are permanently monitored and the data collected are sent to the control PLC. 

The primary circuit, or open circuit, is used to cool the water in the closed circuit. This circuit is fed with filtered plant water, which, once it has passed through the heat exchangers, is returned to the process.

The whole ozone dosing process is carried out automatically by means of a system of valves and flow controls, so that the plant operator can inject the required amount of ozone into the water in a stable manner.

All these values are managed by a control panel where the operator can locally modify ozone dosing data.

All the plant performance values are collected in this control PLC and fed to the main SCADA of the Santillana DWP.

The management software was entirely developed by Newland EnTech Europe engineers for the exclusive use of the Santillana DWP, taking into account in the design all the requirements of the plant operator.

The plant control incorporates the "SENTINEL" remote access system that allows us to monitor the status of the installation from a distance.

With this new installation, Newland EnTech reaffirms its position as one of the world's leading designers and builders of ozonation plants.

With more than 40,000 kg/h of ozone installed around the world, Newland contributes to the environment protection by reducing the consumption of chemical products using clean technologies.

For more information, contact our commercial department at info@newlandentecheurope.com .