ESMIL participated in the comprehensive modernization of the Myślenice wastewater treatment plant as one of the suppliers of process equipment. Working under a contract with the general contractor, Inżynieria Rzeszów S.A., we were responsible for manufacturing and supplying equipment for the secondary clarifiers, gravity sludge thickener and flow control and isolation within the plant’s treatment system. Our scope of work also included the installation and commissioning of all supplied equipment.
ESMIL’s scope of supply for the Myślenice wastewater treatment plant
The Myślenice wastewater treatment plant underwent a comprehensive modernization as part of a project involving the construction, reconstruction, expansion and demolition of facilities at the plant.
The general contractor, Inżynieria Rzeszów S.A., selected ESMIL to manufacture, supply, install and commission radial scrapers for the secondary clarifiers, a picket scraper for the gravity sludge thickener and wall-mounted and channel-mounted penstocks for flow control and isolation throughout the plant.
ESMIL radial scrapers for secondary clarifiers
As part of the project, we supplied ESMIL ZGR-20 radial scrapers for secondary clarifiers with a diameter of 20 m.
In secondary clarifiers, activated sludge is separated from biologically treated wastewater through sedimentation. The scrapers collect sludge that settles at the bottom of the clarifiers and remove floating material from the wastewater surface.
The ESMIL scraper design minimizes sludge resuspension as settled sludge is moved toward the sludge hopper. This helps maintain stable settling conditions and ensures efficient sludge removal from the secondary clarifiers.
ESMIL picket scraper for gravity sludge thickening
We installed an ESMIL MPR-9 picket scraper in the gravity sludge thickener to support the thickening process before further sludge treatment.
The slow movement of the scraper helps release water from the sludge and facilitates drainage, increasing its dry solids concentration. Reducing sludge volume means less material needs to be handled in subsequent treatment stages, including dewatering.
The mechanism is designed for continuous operation, with adjustable rotational speed to match the mixing intensity to sludge characteristics and current operating conditions. This helps maintain effective thickening even when the properties of incoming sludge change.
Flow control and isolation using ESMIL penstocks
As part of the modernization, ESMIL also supplied wall-mounted and channel-mounted penstocks for regulating or shutting off flow in different parts of the treatment system. All penstocks were installed and commissioned on-site by our team.
Wall-mounted penstocks are installed at inlets, outlets and other process openings. They allow operators to open or shut off flow and, depending on their location, isolate specific sections of the system.
Channel-mounted penstocks are designed for use in open process channels. They allow flow to be regulated or shut off, enabling wastewater to be directed between different parts of the treatment plant.
Proper penstock placement allows operators to manage flows and isolate individual treatment units or sections of the system when necessary, for example during maintenance and servicing. This simplifies day-to-day operations and makes it easier to carry out work that requires temporarily taking part of the system out of service.
Summary
The modernized Myślenice wastewater treatment plant was officially opened on August 20, 2026. ESMIL has completed its scope of work, and the equipment we manufactured, installed and commissioned is now part of the plant’s treatment infrastructure.
The Myślenice project is another example of ESMIL equipment being used at different stages of wastewater treatment and sludge management. Within a single project, we supplied several types of equipment serving different process functions, while also taking responsibility for their installation and commissioning on-site.
We would like to thank Inżynieria Rzeszów S.A. for their trust in ESMIL and for entrusting us with this scope of work. We are pleased to see the results of our collaboration at the modernized Myślenice wastewater treatment plant.
