Archives: Realizacje

The objective of the investment was to modernize key technological systems, increase the plant’s treatment capacity, and improve the safety and reliability of its operation. The project included the expansion of the existing technological infrastructure and the modernization of key treatment systems.

As Ecol-Unicon, we carried out a comprehensive scope of modernization and expansion works at the treatment plant, taking responsibility for coordinating technological and construction activities. The result of these efforts is an almost twofold increase in the facility’s capacity – to approximately 700 m³ of wastewater per day – and preparation of the plant for safe and stable long-term operation.

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Scope of work

Scope of work wideo play
  • construction of a mechanical treatment system, including a hook-and-panel screen chamber, a screenings washer-press, and a technological canopy
  • construction of a sanitary wastewater pumping station with full equipment
  • modernization of excess wastewater storage tanks with associated equipment
  • construction of a mechanical treatment building with a dedicated room for waste containers
  • modernization of the existing biological reactor, including replacement of the aeration system
  • expansion of the biological treatment section through the construction of an additional reactor with a secondary clarifier, using an existing reinforced concrete tank
  • construction of aerobic sludge stabilization tanks with a total capacity of approx. 120 m³, together with sludge thickening facilities
  • execution of a sewage sludge hygienization system using a lime dosing unit
  • construction of a biofilter for process air treatment
  • execution of technological, leachate, power supply, and control networks, as well as an alternative power supply in the form of a generator set
  • performance of technological start-up, testing, and handover of the facility for operation
  • comprehensive site development works

Implemented solutions

The technological solutions applied at the wastewater treatment plant in Włosań were selected to ensure more effective wastewater treatment and to reduce the facility’s impact on the surrounding environment. The expansion and modernization of mechanical and biological systems, combined with new sludge management installations, enable stable and efficient operation of the plant at nearly double its previous capacity.

 

The implemented technologies directly improve the quality of treated wastewater discharged into the environment and reduce emissions of nuisance odors, which is of significant importance both for the condition of water resources and for residents’ quality of life.

The modernized facility is characterized by higher standards of safety and reliability, as well as environmentally friendly solutions that minimize the plant’s impact on its immediate surroundings.

 

As Ecol-Unicon, we delivered the investment as the general contractor, taking responsibility for the comprehensive modernization and expansion of the facility. The completed works resulted in stable and efficient operation of the treatment system, lower operating costs, and infrastructure readiness for further development and the growing needs of the municipality. The investment represents a tangible contribution to the protection of local water resources and an example of responsible management of municipal infrastructure that will serve residents for many years to come.

The objective of the investment titled “Construction of a booster pumping station in the village of Goleńsko” was to build a modern water treatment plant enabling effective treatment of groundwater by removing undesirable elements and contaminants, as well as ensuring appropriate physicochemical and bacteriological parameters. As a result of the project, the facility’s capacity was almost doubled, which allowed for increased water availability and improved safety and continuity of supply.

The investment was carried out by Ecol-Unicon under a “design and build” formula and constitutes an important element of the long-term activities of the Chąśno Municipality aimed at improving residents’ quality of life, environmental protection, and sustainable water resource management.

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Scope of work

Scope of work wideo play
  • development of a concept for the expansion of the Water Treatment Plant in Goleńsko and preparation of complete design documentation
  • decommissioning of the existing water treatment technology
  • construction of a new container-type Water Treatment Plant building
  • delivery and installation of fittings, installations, and technological equipment in the new facility
  • construction of a treated water retention tank with a capacity of 148 m³
  • construction of a backwash water settling tank together with a pumping station and a measurement-and-valve chamber
  • performance of technological start-up, staff training, and preparation of the facility for operation

Implemented solutions

The new water treatment plant in Goleńsko was designed and constructed based on modern groundwater treatment technologies, enabling effective removal of undesirable contaminants and improvement of drinking water quality parameters. The applied technological solutions ensure stable and safe operation of the facility as well as high quality of supplied water.

 

The implementation of the project increased water availability to 73,945.00 m³ per year, representing an increase of approximately 32,335.00 m³ annually compared to the previous capacity of the facility.

This translated into improved living conditions for residents and the inclusion of additional consumers in the upgraded water supply system. The modern infrastructure also allows for reduced network failure rates, improved water pressure, and increased supply security.

 

As Ecol-Unicon, we delivered the investment under the “design and build” formula, acting as the general contractor and being responsible for the entire investment process – from preparation of documentation, through delivery and installation of technological equipment, to commissioning, operational optimization, and handover of the facility for use. The completed modernization represents an important step toward the sustainable development of the municipality and the long-term safety of its residents.

 

The project was made possible thanks to financial support from the Polish Government Fund “Polski Ład” and the Provincial Fund for Environmental Protection and Water Management in Łódź.

How was the project in Goleńsko implemented?

The project in Goleńsko was carried out by a team with many years of experience in the implementation of water supply infrastructure investments. This allowed for efficient execution of all project stages – from preparation of design solutions to commissioning of the installation – while maintaining the required quality and safety standards.

 

The result is improved drinking water quality, greater stability and security of supply, and increased comfort of everyday use, which has a direct impact on residents.

 

Wojciech Tomaszewski
Director of the Investment Execution Department, Ecol-Unicon

The goal of this investment was to strengthen the reliability of the local sewage system, improve wastewater treatment efficiency, and adapt the installation to the growing needs of residents and the planned development of the area. The modernization increased the plant’s capacity from approx. 125 m³ to an average of 600 m³ of wastewater per day, preparing it to serve new catchment areas.

An integral part of the task was the comprehensive renovation of the sewage pumping station – crucial both for residents’ comfort and for compliance with environmental requirements resulting from EU directives. The pumping station was adapted to handle larger volumes of wastewater, including those generated by newly built service infrastructure such as the amusement park constructed within the municipality of Brojce.

Scope of work

Modernization of the wastewater treatment plant in Brojce included, among others:

  • modernization of the Bioblock WS-400, including cleaning, sandblasting and anti-corrosion protection of steel structures, and replacement of technological equipment (2 technological lines)
  • installation of a new aeration system in the nitrification chambers
  • equipping the facility with a blower station
  • supply and installation of a new discharge station for hauled wastewater
  • implementation of a new automation system and full integration of plant operation

The renovation of the sewage pumping station included:

  • reconstruction of pumping chambers with a dedicated retention section
  • cleaning and anti-corrosion protection of the walls of both chambers
  • installation of a new basket screen
  • installation of a submersible mixer and pump in the retention chamber
  • installation of two submersible pumps with new piping in the wet chamber
  • supply and installation of a new DN2000 shut-off valve chamber equipped with shut-off fittings
  • execution of new electrical installations and measurement systems for both pumping chambers

Implemented solutions

The modernization of the municipal wastewater treatment plant in Brojce increased its throughput and improved the reliability of crucial technological systems. As a result of the works, the preliminary treatment process along with the raw wastewater retention system was relocated outside the treatment plant area – to the pumping station, which was also renovated. This arrangement streamlined the flow and optimized the operation of the entire facility.

The modern discharge station and the new automation system improved daily operation as well as monitoring of the treatment plant. Meanwhile, the renovation of the sewage pumping station enhanced transmission parameters and the technical condition of the installation, preparing it to serve new users, including upcoming commercial developments within the municipality.

As the General Contractor, we delivered this project in a “design and build” formula, taking responsibility for the complete scope – from documentation development, through construction works, to commissioning and technological testing of all mechanical, electrical and automation systems (AKPiA).

This was the second project carried out by Ecol-Unicon at this facility. During the construction of the PM-1 pumping station (commissioned in 2016), the company performed all technological works, including the installation of pumps and screens. This time, as the General Contractor, Ecol-Unicon was responsible for the comprehensive replacement of four pumps, along with adapting the necessary elements of the facility to the new equipment (including modification of pressure pipelines and installation of guide rails), and installation of flow meters.

The works carried out increased the efficiency of the pumping station, its safety, and the reliability of the wastewater transport system. Thanks to the modernization, the facility is now better prepared for increasing hydraulic loads and ensures stable long-term operation.

Scope of work

  • dismantling of four existing pumps along with their elbows
  • replacement of guide rails and coupling elbows
  • delivery, installation, and commissioning of four new submersible pumps for raw sewage
  • installation of new flow meters
  • modernization of the power supply and control system for the pumps
  • implementation of changes in the PLC controller and integration with the existing automation system
  • execution of mechanical (technical), hydraulic, and technological start-ups
  • preparation of complete design and as-built documentation

Implemented solutions

The project was carried out under a “design and build” formula, which allowed for a comprehensive approach to modernization—from design preparation, through supply and installation, to commissioning of the new equipment. The modernization aimed to increase the reliability of the pumping station and adapt it to future operational needs.

Although the structure of the pumping station tank remained unchanged, key technological components were replaced. The new pumps feature high energy efficiency and resistance to clogging by suspended solids and debris, which is particularly important when handling untreated raw sewage.

How did pumps replacement proceed in practice?

This investment was demanding due to the scale of the facility and its key importance for the operation of Gdańsk’s entire sewage network. The works were carried out on an active facility, which required not only precise execution but also close coordination with the infrastructure owner – Gdańsk Water and Sewage Infrastructure – and the operator, Gdańsk Water and Sewage Operator.

Ensuring the continuous operation of the pumping station throughout the project was crucial. The pumps were replaced one by one—after each installation, the necessary start-up was carried out. Only after a successful start-up was completed did work begin on dismantling and replacing the next pump. This approach allowed three pumps to remain operational at all times, ensuring full functionality of the facility, safety, and uninterrupted operation of the entire system.

 

Rafał Biesik, Project Manager

Scope of work

Within the scope of this investment task:

 

    • the bodies and equipment for two pumping stations (PS and PD) were delivered,
    • pumping station equipment was installed and hydromechanical commissioning performed,
    • two DN 6000 tanks were delivered and installed: a firewater tank and a retention tank,
    • a BIOFIT 450 treatment unit body and equipment were delivered,
    • treatment plant equipment was installed,
    • hydromechanical and technological commissioning were carried out,
    • a high-efficiency coalescence separator with sedimentation (ESK‑H 30/3000 SEP K), two fat separators with sedimentation (EST‑H 4/800, designated SEP and SEP4),
    • a high-efficiency two-chamber vortex sedimentation tank with lamella inserts (EOW‑2L 40/400) was delivered,
    • two overflow and fat‑level alarms (EU‑AL PT), an oil‑level alarm (EU‑AL R), and an alarm for overflow, oil level, and sediment (EU‑AL PRO) were delivered,
    • a watertight wall-mounted enclosure (OH‑4B.3) with PG‑7 cable glands was delivered,
    • a DN 3000 well (ZB1) and a DN 2000 well (ZB2) were installed.

    • Applied solutions

    The project utilised well-established and reliable technologies and products, including:

     

    • BIOFIT 450 treatment plant – a compact, modular solution ready for integration into wastewater treatment systems, offering future expandability.

    • Ecol‑Unicon separators and settlers – provide effective retention of pollutants, including petroleum derivatives and fats. Key technologies include ESK (coalescence separator), EST (fat separator), and EOW (lamella settler).

    • EU‑AL PRO alarm system – monitors sediment, fat, and overflow levels, minimising the risk of failure and streamlining operation and maintenance.

    • OH‑4B.3 sealed enclosure – ensures full tightness and protects the installation from external environmental factors.

    • Retention manholes (DN 3000, DN 2000) – durable infrastructure components with high storage capacity, supporting effective stormwater management.

    Scope of work

    Ecol‑Unicon carried out the following construction works:

     

    • delivery and installation of the pumping station body (DN 6000);

    • delivery and installation of the pumping station equipment and hydromechanical commissioning;

    • supply of a DN 2000 sedimentation tank with a volume of 3.0 m³;

    • high-performance ESK‑B II 20/200/315 coalescence separator with bypass.

    Applied solutions

    • Prefabricated DZB tank – a modular, reinforced-concrete tank offering high tightness and structural strength, easy to assemble and configurable according to local conditions (including driveable surfaces);

    • The pumping station body of diameter DN 6000 enables handling of high flows;

    • The sedimentation tank with parameters DN 2000, V = 3.0 m³ is a typical solution used in stormwater or industrial sewer systems for preliminary solids separation;

    • The ESK‑B II 20/200/315 coalescence separator is a high-efficiency Class I device, equipped with a sedimentation chamber, coalescence filter, and bypass, designed to treat stormwater containing hydrocarbons and suspended solids at a nominal flow of 20 dm³/s. Thanks to its compact concrete body and large oil retention capacity, the separator complies with PN‑EN 858 and provides effective environmental protection.

    Scope of work

    The investment involved the comprehensive construction of a sanitary and stormwater drainage system, including a local modular wastewater treatment plant.

     

    As part of the project, Ecol‑Unicon delivered an ENA‑200 active odour neutraliser with a carbon filter cartridge and carried out its commissioning. The neutraliser was installed to reduce nuisance odours in the area surrounding the treatment facility. This solution significantly contributes to environmental protection and improves the quality of life for the residents of Jamielnik.

    Applied solutions

    The installed neutraliser is a modern device that uses an impregnated activated carbon cartridge to reduce odours and volatile toxic substances, including hydrogen sulphide (H₂S). The system is capable of removing up to 95% of odorous compounds.

     

    This solution stands out for its compact design, which enables quick installation and easy operation, as well as the possibility of expanding the odour control system if the treatment plant’s capacity increases in the future.

     

    The ENA unit is suitable for use in pumping stations, lift stations, and wastewater treatment plants – wherever effective odour elimination is required with minimal operating costs.

    Scope of work

    Ecol‑Unicon was responsible for the construction of the sanitary sewer system and the installation of the ESS PE 100 sewage pumping station, including the associated pressure pipeline.

    The ESS PE pumping station features a module made entirely of PEHD. Thanks to its dual-channel separator design, it is adapted to operate under very high wastewater inflow rates. The scope of the contract included the full construction of the sanitary system and the pressure pipeline, as well as the delivery and commissioning of the ESS PE 100 station.

    Applied solutions

    The ESS PE pumping station is equipped with two dual-channel solid separation chambers, fitted with flexible filtering flaps. In its latest configuration, the separators are installed outside the retention module, positioned at the discharge nozzles of the pumps.

     

    Pumping station parameters:

    • Wastewater type: sanitary
    • Flow rate: Q = 40 m³/h
    • Pumping head: 36 m
    • Pumps operate in alternating mode

     

    Hydraulic system configuration:

    • Knife gate valve on the inflow to the pumping station – DN 200
    • Fittings on the pressure pipeline:
      • 2 × non-return valves – DN 100
      • 2 × shut-off valves – DN 100
    • 2 × shut-off valves on the suction line
    • Piping: DN 100
    • Electromagnetic flowmeter – DN 100
    • 2 dry-installed pumps operating in alternating mode
    • Drainage pump with an automatic switch activated upon detection of water in the pump body

     

    Additional components:

    • Ecol‑Unicon control cabinet, installed on a pedestal next to the tank in a technical container, equipped with a hydrostatic probe and a backup level signalling system
    • Internal lighting inside the pumping station chamber
    • Mechanical ventilation of the pumping station body
    • Anti-odour system for the retention tank

    Scope of work

    • Construction, delivery, and installation of a retention tank for collecting stormwater, with the option to use it for firefighting (firewater) purposes. The tank was tailored to site conditions and road infrastructure requirements.
    • Installation of flow control components such as valves, regulators, and pump systems.
    • Integration of additional functional modules to enable the tank’s use in fire safety systems.

     

     

     

     

    The tank is part of a larger infrastructure project. The S3 expressway is a component of the pan-European corridor – the Central European Transport Corridor. The project includes the construction of 11 engineering structures along the S3 route, four overpasses across the expressway, two road tunnels approximately 2300 m and 320 m in length, and a Motorway Service Area (MOP) designed for rest and service purposes. The MOP will feature parking spaces, maneuvering lanes, sanitary facilities, and ultimately a fuel station and food and retail amenities.

    Applied solutions

    • The project employed a HYDROZONE retention tank designed to manage and remove excess stormwater.
    • The tank has a capacity of 200 m³.
    • Its structure allows for the installation of infiltration openings.
    • The modular design enabled flexible adaptation of the tank to the specific conditions of the service area.
    • The concrete tank is suitable for installation in trafficable areas.

     

     

     

     

    This investment enhances the operational safety of the MOP. In addition, the applied solutions and modular design allow for easy maintenance. The use of this type of retention tank also provides the option of equipping it with the Bumerang Smart system – an intelligent platform for remote monitoring and management of operating parameters.

    Scope of works

    • Construction of two underground sewage intake tanks in the form of retention tanks, made of plastic (DN 3000, L = 16 m, V = 107 m³ each);
    • Installation of a mechanical wastewater pre-treatment system, including two mechanical screens to remove solid waste such as wet wipes;
    • Replacement of the pumping station’s technological equipment.

    Applied solutions

    The investment utilised prefabricated plastic retention tanks with a DN 3000 diameter, in line with Ecol‑Unicon’s offering for high-capacity retention systems. These tanks provide long-lasting performance in handling stormwater and wastewater under demanding operating conditions.

    For pre-treatment, mechanical screens were installed to effectively intercept coarse solids and protect the pump-and-pipeline infrastructure, improving the station’s operational reliability.

    The pumping system was fully upgraded with four new pumps tailored to different hydraulic conditions. The total installed pumping capacity is 430 kW:

    • 2 × 75 kW pumps (flow rate: 1300 m³/h),
    • 2 × 140 kW pumps (flow rate: 2300 m³/h),
    • Combined maximum flow rate: 2600 m³/h.

    The system was also designed to maintain performance in the presence of air cushions, with minimum flow rate maintained at approx. 2000 m³/h.

    The applied technologies are consistent with Ecol Unicon’s EPS system.

     

     

     

     

    System Performance Parameters:

     

    • capacity of a single P2 pump (75 kW): 800 m³/h;

    • capacity of two P2 pumps (75 kW): 1300 m³/h;

    • capacity of a single P2 pump (140 kW): 1400 m³/h;

    • capacity of two P2 pumps (140 kW): 2300 m³/h;

    • combined operation of 2 × P2 75 kW + 2 × P2 140 kW: 2600 m³/h.

    In the presence of air cushions, the system’s capacity may drop to approximately 2000 m³/h.
    The total installed power of the pumping system is 430 kW (2 × 140 kW + 2 × 75 kW).

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