Clean Water for the Baltic Sea

Project ID: [00009493]
Installation:Open Trench, Relining
Total Length [m]:2180
Nominal Diameter DN [mm]1200 | 2000
Nominal Pressure PN [bar]1
Nominal Stiffness SN [N/m2]5000

Construction works for a wastewater treatment plant had been planned in the 70’s. However, investments were ceased after the collapse of the Soviet Union and the project was brought to a halt. 20 years later, the Swedish government offered support for the city to continue the construction that would cost estimated 54.5 million euros. Yet it is only now that the actual construction could be initiated due to technical requirements and Russian laws. The, for the greater part, concrete line established in the past has corroded with time although it had never been used. A first step toward the new treatment plant was therefore its rehabilitation. Light weight and leak-tightness of the complete system were, amongst others, decisive criteria for OOO Meba, the prime contractor, to award HOBAS Pipe Poland the contract of 2 km HOBAS SewerLine® Systems in September 2007. With a roughness factor k ≤ 0.01 mm, the almost mirror like lining of the pipes allowed a decrease in nominal diameter retaining the same hydraulic properties. A further advantage that spoke for HOBAS were several reference projects successfully conducted with other Baltic contractors in Lithuania, Latvia and Estonia and last but not least the technical assistance of HOBAS® Engineers.

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