Modernisation of Sewage Pumping Station P‑10 in Kieźliny
Inwestor / Przedsiębiorstwo Wodociągów i Kanalizacji Sp. z o.o.
Kieźliny
2022
The project involved the modernisation and extension of Pumping Station P‑10, located in Kieźliny on Jagałły Street, approximately 70 m north of the Wadąg River.
Originally built between 1978 and 1979, the station required a comprehensive upgrade. It is the second-largest facility among 23 sewage pumping stations in the Olsztyn agglomeration and one of only two monitored 24/7 by the local water utility operator.
The greatest challenge during implementation was the need to perform all work while keeping the station operational, as the facility receives continuous inflows of wastewater.
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:
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capacity of a single P2 pump (75 kW): 800 m³/h;
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capacity of two P2 pumps (75 kW): 1300 m³/h;
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capacity of a single P2 pump (140 kW): 1400 m³/h;
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capacity of two P2 pumps (140 kW): 2300 m³/h;
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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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