Microfiltration and filtration

Microscreen drum filter


  • Microscreen drum filters are an ideal solution for filtering the water from wastewater treatment plants.
  • In addition, the filters are used for filtering the water from paper mills and textile industry, power and heating plants, fish farms, ZOOs, and many other operations.

“CLI-CLO” system:

  • The principle is based on a uniform supporting cartridge with a variable filter cloth for all filter sizes. The filtration cartridge can be installed very quickly without any fastening elements or tools.


  • considerable improvement in the quality of treated water
  • small spatial demands
  • low investment and operating costs
  • fully automated operation
  • substantially higher reliability of treatment
  • high resistance to wear and damage


  • according to the flow rate of water through the filter
  • variable placement
  • density of filter cloth
  • material of filter cloth
  • sludge discharge ensured by self-gravity or using a pump


Microscreen drum filter

Disc filter


  • Disc filters are designed for filtration of large volumes of waste water with demands for high quality of cleaned water.
  • They are applied for filtration of water from waste water treatment plants, in fish farms, in the food and paper industries and for recycling of cooling water in power plants. In some cases, these filters can be used for recovery of valuable substances from process waters.


The basic filtering element is a fabric-coated filter segment. Water flowing into the inner space of the filter segment flows through the fabric while fine impurities are trapped on the cloth. The segments are fixed on the disc shaft. Twelve segments make up one disc. The number of discs determines the capacity, i.e. the size of the filter.

We offer disc filters with 4, 6, 10, 16 and 24 discs with a filtration range of 5 to 200 μm.

Filtration runs continuously.


  • filtration of large flows up to 730 l/s
  • filtration from 5 μm
  • high quality of cleaned water
  • low built-up area demands in the ratio to filter capacity
  • alternative to micro-strainer drum filters
  • low investment and operating costs
  • high cleaning reliability
  • high construction resistance to wear and damage


  • depending on the required filter capacity
  • depending on location – in concrete channel or steel tank
  • depending on the required quality of filtered water
  • depending on the sludge discharge method – by gravity or by pump


Disc filter

How to solve tertiary treatment in municipal wastewater treatment plants?

Nowadays, tertiary treatment has become an important part of water treatment plant design. There are many reasons for this, especially the need to have the stringent parameters of the catch basin observed, entrapment of impurities during torrential rains, and to ensure the quality of discharge according to the required parameters. Microscreen drum filters represent an ideal solution for filtering the water from wastewater treatment plants.

Here, the filters are applied within the third, i.e. final, stage of treatment. When the treatment plant does not sufficiently fulfil the limits at outlet, the latter can be safely adhered to using the microscreen drum filters.

IN-EKO microscreen drum filters

This type of microscreen drum filter is very resistant and worked out in terms of its design. The development team which is exclusively engaged in microfiltration has rich experience, supported by the fact that the number of produced microscreen drum filters will have exceeded 1,100 units by the end of the year. Therefore, we are one of the leading manufacturers of microfiltration equipment in the world.

The entire design of the equipment places emphasis on the long service life of the filter and minimum wear of individual components. IN-EKO microscreen drum filters are only made of stainless steel and high quality plastics.

Every application requires an individual approach. Therefore, more equipment variants are available.

  • model series according to the hydraulic equipment needed
  • installation in a concrete channel or on flanges above the terrain level
  • both density and material of the filter cloth can be changed
  • discharge of the sludge from the filtration equipment can be ensured by self-gravity or using a sludge pump
  • various control options and automation levels
  • it is possible to easily operate the complete blocks of microscreen drum filters

How does it work?

The water containing solid particles flows through the supply piping or channel inside the filtration drum, and impurities are entrapped on the interior side of the filter cloth. Subsequently, the treated water flows via the cloth outwards. In the course of this filtration process the entire filtration equipment is in idle state (it does not consume any energy). The filter cloth will become gradually clogged with influent impurities, the cloth resistance to flowing will increase, and the water level and hydrostatic pressure inside the drum will rise.

Once the set level is reached inside the filtration drum, the level sensor will automatically switch on the drum rotation drive and the backwash pump delivering the filtered water to the backwash system nozzles. The directed water stream jetted by special nozzles will remove the impurities entrapped on the interior side of the cloth into the discharge trough installed inside the drum. The sludge will be transported to the sludge pit and then delivered outside using the sludge pump that is also controlled automatically by means of level sensors installed on the sludge pit wall. If self-gravity discharge of sludge is ensured, the sludge pump will be omitted. After the backwash process is completed, the hydrostatic pressure resistance will become decreased and the drum drive and backwash pump will be switched off. The equipment will pass to idle state.

Since the raw water supply is not interrupted during the backwash process and the backwash water is supplied directly from the filtration equipment, no additional entrapment tanks for backwash water or sludge water are needed, resulting in a considerable reduction in investment costs. The sludge pit is an integral part of the equipment.

Automatic switch on/off of the filter minimizes the electric power consumption, improves the average quality of filtered water and increases the density of discharged sludge as well as the service life of the entire facility.

When the microscreen drum filter is put out of operation due to electric power failure, the filter cloth will, after some time, become completely clogged and the water will reach the emergency level. In such a case the water is discharged via an overflow; the residual filtered water will remain pure. Once the cause of failure is removed, the equipment will be able to start filtering without any intervention inside the machine. The backwash pump has sufficient water to perform high quality backwash of the filter cloth. The equipment will return to the original cycle.


As time passes, the water in the landscape can be regarded as increasingly rare. Man has been contributing to its disappearance and contamination due to various activities deemed as being vital. These activities, however, destroy one element that is vital for man and other living creatures, i.e. the landscape. Let the microscreen drum filter become a small but significant contribution to turn around the trend of impact of human activities.