Hydrotech™ Discfilter

Hydrotech™ Discfilters are specially designed for suspended solids removal. The mechanical, self-cleaning filters use a combination of high quality materials and patented processes, enabling facilities to meet stringent performance requirements in a variety of applications within the municipal and industrial markets.

Mechanical and self-cleaning filter to optimize suspended solids removal.


The Hydrotech™ Discfilter provides proven performance for today’s demanding wastewater treatment applications. Its innovative design and robust construction consistently produce high quality effluent despite high solids loadings and unstable or changing conditions.  

Hydrotech™ Discfilters benefit from many patented designs including the oscillating backwash spray header, which provides efficient media cleaning while reducing water consumption by 20 percent. 

In addition, its compact design results in two to three times more filtering area compared to drum filters of the same external dimensions. This makes it the ideal solution for recirculation systems, effluent polishing of wastewater, fine filtration of intake water, or other applications where a space-saving filter with fine filter openings and large filter area is required.

How Hydrotech™ Discfilter work

The process uses woven cloth filters mounted on multiple discs providing a large filtering area in a small footprint. The water to be treated flows by gravity into the center drum and then passes through the filter media mounted on both sides of the discs. The solids are retained on the media within the discs and the purified water flows to the collection tank. As the solids accumulate, the water level rises, triggering a level sensor that automatically initiates backwashing. The filtered effluent is pumped to the backwash spray nozzles, washing solids into the sludge trough as the discs rotate. 100 percent filtration capacity is continuously maintained, even during backwashing.

Features and Benefits

air quality picto

Up to 98% suspended solids removal 

Small footprint 

Self-cleaning backwash nozzles 

Continuous filtration during backwash - no external water source required for backwash 

Backwash efficiency reduces operating costs and carbon footprint 

 Filter panel life time up to 10-15 years

Simple and minimum wear parts maintenance 


Quick return on investment due to low installation, operation and maintenance costs 


Optimized management of effluents and wastewater.
Technologies, services and process expertise to meet environmental requirements, remove contaminants and transform wastewater into a resource.
Solutions for the control, interception and clarification of stormwater
Solutions allowing the use of treated wastewater for beneficial purposes.


We offer a complete range of services to meet your exact requirements for your water treatment facilities:

A combination of digital tools and Veolia expertise that make all your water processes smarter, safer and more sustainable.
We provide a wide range of services to existing facilities including technical support, pre-planned preventive maintenance, spare parts, etc.

Resources & Product range

Hydrotech manufactures state-of-the-art microscreen filters and constantly develops technologies to create new and innovative solutions.

The Hydrotech filters are available in a variety of models:

Drum filters
Hydrotech™ drum filters are mechanical, self-cleaning filters. They are specially designed for high performance in systems where it is  essential to prevent particles from fragmentation.

Hydrotech™ Performance Filter 
Is equipped with the patented PagusTM technology – an innovative particle guidance system. This technology along with over 50 product improvements sets a new standard in disc filtration. Ongoing research ensures the most cost-effective filtration methods available.


Hydrotech filters are a well accepted technology and brand for suspended solids and total phosphorus removal in everything from intake to wastewater applications. Innovation and continous improvements of our product line gives us an unbeatable edge on the market. We are well known for providing efficient customized solutions for different customers and projects.

Philip Wassvik

Municipal Sales Manager / Deputy Sales Director

Contact the Hydrotech Sales team



FAQ about Hydrotech™ Discfilter

How do you remove suspended solids from wastewater?

Suspended solids removal can be performed by filtration using disc filter technology. Filtration captures and removes the  suspended solids by passing wastewater through a filter media.

What are disc filters used for in wastewater treatment?

The main application for disc filters in wastewater is for tertiary treatment also known as effluent polishing. Tertiary treatment consists of a third step in the process of wastewater treatment. More advanced and rigorous, it allows the removal of nutrients such as phosphorus, nitrogen, microplastics and practically all suspended and organic matter from wastewater. The most common treatment in a wastewater treatment plant is primary and secondary treatment while the tertiary treatment ensures a better outlet quality for the recipient or in reuse applications.

Why is it important to remove suspended solids from water?

High total suspended solids levels in the water can cause severe harm to wildlife and aquatic life and can even be hazardous to human health. For this reason, total suspended solids must meet levels defined by state regulations. As such, municipalities follow strict regulations regarding water quality discharge to provide safe and reliable water sources to protect both the environment and its citizens.

Case Studies

Hydrotech™ Discfilter for Bahr El-Baqar, the world largest water treatment plant

Located in Sinai, east of the Suez Canal in Egypt, the Bahr El-Baqar plant HydrotechTM Discfilter installation is by far the biggest in the world, both in the number of filters supplied and total filtration area. This helps reduce the environmental impact of the wastewater treatment plant and reduce water intake from the Nile overall.