Bypass during the renovation of a DN 1800 reinforced concrete sewer collector along the Biała River in Białystok
Bialystok, Poland The modernization of the sewage system in the area of Jana Pawła II Avenue in Białystok was carried out as part of the international Interreg project “SafeSewerage – Safe sewerage for a healthy environment: cross-border solutions of Lutsk and Białystok.” The tender for the investment was won by a consortium of F.H.U. INSTBUD and AARSLEFF. The scope of work included the renovation of a reinforced concrete sewer collector with a diameter of DN 1800, running along the Biała River. The modernization was planned to be carried out using modern trenchless technology, which made it possible to avoid deep excavations and significant interference with the surface of the area. The solution used made it possible to significantly reduce the nuisance for residents and minimize the impact of the works on the natural environment. In order to ensure the continuity of the sewage system, the investor asked us for technical support in the design and implementation of a temporary bypass. The key task was to take over the flow of sewage in the DN 1800 collector without any failures and to pump it over a distance of approximately 850 meters, which enabled safe and uninterrupted renovation work inside the sewer.
Main assumptions of the bypass:
– designed capacity of the temporary pumping station: approx. 2870 m³/h
– pressure line made of HDPE DN 600 pipes with a length of approx. 850 m
– 24/7 supervision of pump operation using a remote monitoring system
RENTA PUMPS solutions:
We approached the project with the utmost care, guided by full technical responsibility and applicable industry standards. Based on a site visit and a detailed analysis of the complete project documentation, our engineers developed a comprehensive solution to ensure reliable and continuous sewage pumping. The design took into account both the considerable length of the pressure pipeline and the specific terrain and operating conditions. The HDPE DN 600 pipeline, as agreed with the investor, was prepared and delivered by the customer on its own.
The project involved the use of Hidrostal F10K pumps operating in parallel, controlled by frequency converters integrated into a PLC control container with a total power of 4 × 45 kW. The system was additionally equipped with vacuum pumps and an advanced monitoring system, which enabled fully automated and intelligent control of the temporary pumping station. The installation was operated from a single operator panel, with the possibility of remote supervision and ongoing control of operating parameters.
The power supply to the temporary pumping station was secured by two FOGO power generators, each with a capacity of 200 kVA, operating in an automatic reserve switching system (SZR). The independently designed and manufactured SZR system guaranteed a high level of reliability and continuity of bypass operation throughout the entire investment period.
Equipment:
4 szt. – Pump Hidrostal F10K
1 szt. – PLC control container 4 x 45kW with vacuum pumps
2 szt. – FOGO 200kVA power generator
1 szt. – SZR system
850 m. – HDPE DN600 pipeline
Adapters, T-pieces, accessories
The project in numbers:
24/7 remote monitoring of pumping station operation
2870 m3/h pumping station capacity
850 m pipline HDPE DN600
400 kVA total supplied power
