ESK coalescence separators
A solution for removing petroleum substances from stormwater and snowmelt
Ecol-Unicon’s separators are designed with the highest quality and performance in mind
With their purpose-designed construction, they provide effective separation and containment of contaminants. This protects the environment from pollution and avoids potential problems associated with sewer contamination.
Benefits of use
Compliance with EN 858 standards and proven reliability
Our separators meet the stringent requirements of the EN 858 standard, validated by tests conducted in accredited laboratories, ensuring the highest quality and operational safety standards.
Sustainability certified by EPD
ESK separators have an Environmental Product Declaration (EPD), providing transparent and independently verified information on their environmental impact throughout the product life cycle.
Easy maintenance without entry into chambers
ESK separators are designed so that maintenance operations can be performed safely from ground level, without the need to enter the separator.
Corrosion and chemical resistance
Technological components made of polyethylene (PE) are resistant to corrosion and provide high chemical resistance, contributing to the durability and long service life of the separator.
Lightweight design for faster installation and maintenance
PE components are significantly lighter than their steel counterparts, greatly simplifying and speeding up the installation and maintenance processes.
Modular design for flexibility and convenience
The modular design allows individual components to be replaced, simplifying cleaning and maintenance operations.
Technical support for designers
We offer expert assistance to clarify technical details, supporting designers at every stage of the project lifecycle to ensure seamless implementation.
Quick access to spare parts
Our efficient logistics system ensures the fast availability of spare parts, minimizing downtime and supporting uninterrupted operation.
Specialized solutions for demanding applications
Our portfolio includes advanced solutions such as separators with sorbents, integrated sampling chambers, and inlet closures specifically designed for industrial wastewater applications.
Proven quality in domestic and international markets
The trust of our customers is evidenced by over 11,000 devices sold in Poland and exports to more than 20 countries worldwide.
Application
Coalescence separators are used in lower flow drainage basins that contain large quantities of pollutants such as petroleum substances and suspended solids.
ESK coalescence separators in concrete tanks are designed primarily for infrastructure projects and facilities with high traffic volumes and demanding operating conditions. Their robust construction makes them suitable for locations where the units are exposed to significant ground loads and heavy vehicle traffic.
ESK-PE coalescence separators in monolithic HDPE tanks provide a lightweight alternative to concrete units. They are particularly recommended where easy transport, fast installation and the possibility of carrying out installation work without heavy equipment are important.
The ESK Coalescence Separator is specified so that its nominal capacity is greater than the maximum incoming flow rate.
Coalescence separators are particularly useful in areas such as:
- workshops,
- car washes,
- petrol stations,
- transport bases,
- industrial facilities,
- medium and small car parks,
- road bridges and viaducts,
- railway areas,
- power stations.
Types of coalescence separators
ESK-PE coalescence separator in an HDPE tank
Additional configuration elements
A device for continuous monitoring of separator operation, equipped with sludge layer, oil and overfill sensors, minimises the need for on-site inspections and reduces the response time of technical services in the event of a malfunction.
Ecol-Unicon provides periodic inspections and maintenance services for separators, including cleaning, sludge level checks and inspection of internal components. Regular servicing helps maintain separation efficiency, reduces the risk of failures and ensures compliance with environmental requirements. Ongoing service support allows the warranty to be extended from 2 to 5 years.
Pre-treatment system
selection calculator
Dimensioning for rainwater and industrial wastewater according to EN 858-2
WaterFolder Platform
A dedicated separator calculator automatically selects a device with the right parameters. It is entirely based on individual data you input into the tool.
The independent calculation saves time and provides a complete set of materials for the selected unit, including descriptions and drawings.
For more information on the selection of separators, see the video from Dining for Designing webinar.
CalculateFind out how to select pre-treatment systems in a few steps
Construction
ESK coalescence separators are available in two construction versions, allowing the unit to be optimally adapted to the specific conditions of each project.
In the ESK version, the body is made of prefabricated concrete and/or reinforced concrete elements and forms a watertight chamber with a diameter of Ø1000–3000. This solution is intended primarily for infrastructure, road and industrial projects, where the concrete structure is suitable for large-diameter units and high ground loads.
In the ESK-PE version, the monolithic body is made of high-density polyethylene (HDPE) using the rotomoulding process, providing a lightweight alternative to concrete units. The construction ensures 100% watertightness and high resistance to corrosion and chemicals. The unit’s low weight facilitates transport and installation, making the HDPE version particularly suitable for smaller projects, modernisation works and locations where the use of heavy equipment is difficult.
Depending on the location of the separator, appropriate classes of cast iron manholes are used. To adjust the separator cover to ground level, separators with concrete bodies can be fitted with an additional superstructure made of concrete rings matching the diameter of the body. The inlet and outlet are located along the separator axis as standard, but can also be offset from the axis of the unit.
Standard technological equipment for an ESK coalescence separator includes an inlet, a coalescence column with an insert, and a system that shuts off the stormwater outflow when the permissible oil storage capacity of the unit is exceeded. This prevents petroleum substances from being washed into the outlet. The equipment is made of HDPE, while the ESK-E and ESK-EH series use stainless steel.
For separators integrated with a settling tank in a single body (ESK-H and ESK-EH), the settling section is located below the coalescence column.
Separators should be supplied by gravity flow. If a pumping station is required, it must be located downstream of the separator. The separator installation site should provide access for a sludge tanker.
Operating method
A coalescence separator uses the phenomenon of coalescence to enhance gravity separation, effectively removing petroleum substances from stormwater and snowmelt.
Coalescence is a physical phenomenon in which small droplets of petroleum substances combine into larger droplets as they flow through the coalescence insert. As the droplets increase in size, they can be effectively separated from the water by gravity, allowing the separator to achieve the treatment efficiency required for Class I separators in accordance with EN 858.
Once the maximum permissible quantity of petroleum substances has accumulated, the automatic outlet shut-off prevents them from entering the sewer system or receiving water, increasing environmental safety.
Operation
The operation of a coalescence separator is simple and safe, as all maintenance activities are carried out from ground level, without the need to enter the unit.
Proper operation of the separator includes regular inspections and periodic cleaning of the unit, involving the removal of accumulated petroleum substances and sludge. Maintenance activities should be carried out by qualified personnel with the appropriate authorisations.
The owner or manager of the facility is responsible for the proper operation of the separator. These obligations arise from applicable legislation, including the Act of 14 December 2012 on Waste, as well as from the manufacturer’s recommendations for the operation of the unit.
Legal requirements and certifications
The cleaning of rainwater and snowmelt from petroleum products is a legal requirement, as stated in the Regulation of the Minister of Maritime Economy and Inland Navigation of 12 July 2019 (Journal of Laws of 2019, item 1311) regarding substances particularly harmful to the aquatic environment and conditions to be met when discharging stormwater and sewage into waters or water facilities.
According to sec. 17.1, rainwater and snowmelt may be discharged into waters or facilities if the concentration of oil substances does not exceed 15 mg/dm³.
According to the regulations, ESK coalescence separators are construction products. They carry the CE mark for compliance with harmonised standard EN 858-1. They are Class I separators: concentration of petroleum substances in the separator effluent < 5 mg/dm³.