Photocatalytic Filters

TITANIUM DIOXIDE photocatalytic filters

Depurex photocatalytic filters consist of a multilayer nonwoven fabric with an intermediate layer of high-efficiency activated carbon microspheres; one side of the media is treated with the highest quality titanium dioxide.

All the air then passes through the media and all the pollutants (not only VOCs) are retained by the activated carbons; upon contact with the titanium dioxide, the UV rays have the necessary time to activate photocatalysis and break down the polluting molecules of the retained VOCs, also regenerating the carbons.

tailored filters for every need

Since 2011, we have been designing and manufacturing custom filters for high performance air handling applications.

Photocatalytic technology provides high levels of purification for a wide range of contaminants and UVC disinfection when necessary.

Depurex filters provide odor control, volatile organic compound purification and bactericidal sanitization in one unit.

We design customized solutions for each product based on specific requirements, intended application area, and size limitations.

By analyzing air quality data, we can predict when filters need to be replaced to achieve the desired results.

A customized product ensures perfect compliance with technical requirements and provides a business advantage through complete control of spare parts management.

solar-activated photocatalytic filters

The use of sunlight as an activator of photocatalysis is the easiest and cheapest way to take full advantage of photocatalytic filtration.

The filter is made by placing the side of the titanium dioxide-treated fabric facing outward, allowing photocatalysis to be activated by sunlight.

It is the ideal solution for applications that do not require extreme process control, such as reducing atmospheric emissions of odorous compounds.

Filters can be produced in various sizes up to a maximum flow rate of about 500 m3/h.

Photocatalytic filters activated by artificial lighting

In some cases, there are limitations to the use of natural light. 

It may be a structural necessity dictated by the nature of the application, or the need to treat high air flows, or finally because it is necessary to push the photocatalytic process to the maximum by controlling the light intensity.

In these cases, the solution adopted is to activate the filter by an artificial light source.

If the treatment plant is made with cartridge filters, each filter is equipped with a light block inserted inside.

The filters are then mounted inside a simple metal container with two separate sections, one for dirty air intake and one for clean air output.

Each filter in the system operates autonomously, making it extremely easy to size the system based on emission levels, contaminant concentrations, and performance goals.

Each cartridge in the 600 series can effectively treat about 500 m3/h.

For other types of filters, the placement of the lighting system is sized and positioned according to the space available in the customer's application.

special filters

Custom designs are our specialty, and therefore, we can design and manufacture filter systems for special needs even in limited quantities.

Systems where photocatalytic filtration is combined with other filtration technologies to achieve very high performances, which cannot be achieved with other systems.

Pictured here is a redundant system for a biomedical application that combines photocatalytic filtration, HEPA filtration, and UVC light beam disinfection.


Depurex progetta e produce filtri fotocatalitici trattati al biossido di titanio per l’abbattimento di composti organici volatili, di cattivi odori e la sanificazione dell’aria da virus e batteri.