Pristine environment protected in northern Greece

Overview_TEXT

Overview

Two of the pumping stations in Maniakoi that transfer sewage to the Kastoria wastewater treatment plant in north-western Greece required redesigning and upgrading. Grundfos SE wastewater pumps with the S-tube® impeller were an important part of this upgrade. Grundfos was up against a project specification that favoured a competitor and managed to present a solution that meets the requirements for efficiency, cost savings and environmental protection.

Maniakoi is a suburb of Kastoria, a town in West Macedonia and the capital of the local prefecture surrounded by a beautiful lake. The area is famous for its cold weather (by Greek standards), local fur production, picturesque surroundings and its lake, a popular base for trout fishing.

The situation
The two existing pumping stations in Maniakoi A2 and A3 were very old and there was a need to renovate the whole facility:

1) The existing pumps were old and constructed to obsolete specifications, so energy consumption was too high
2) The population and the needs of the area have increased, resulting in the existing pumps being inadequate and also working inefficiently
3) Normal wear of the pumps over the years has increased system downtime

The requirement was to upgrade the existing installation by replacing the pumps and all supporting equipment, making the existing pumping stations modern and more functional. Apart from the obvious requirement to pump sewage, special care had to be taken to protect the lake, and this required a redesign of the pumping stations. A project designed to meet existing and future needs of the municipality, including new pumps that are constructed according to the latest standards of sewage applications, deliver the required duty point, and also work efficiently and save energy. One of the special challenges facing Grundfos
was the specifications, which were “promoting” certain competitors.

The Grundfos solution
Grundfos got the order because the data accompanying the Grundfos solution together with the relevant references which were presented to the end user created beyond any doubt a sense of optimism. The local public water supply and sewage company felt comfortable that the Grundfos solution would meet all demands. The contractor who won the tender for the project was Teligioridis-Felekidis ATE. Grundfos supplied eight SE wastewater pumps with the innovative S-tube® impeller, in a special version including 25 m cable and PTC thermistors. Base stands for vertical dry installation were also supplied, together with suction bends and eight IO 113 modules for pump control and protection. In addition, two small KP pumps for the drainage of possible leakage in the dry pits were supplied. Apart from delivering the required duty point and meeting the needs for dry vertical installation, the most important feature of the pumps was the high pump efficiency at the duty point (71.4 %) and the low energy consumption (17.8 kW). These two elements together with the excellent relationship with the contractor Teligioridis-Felekidis ATE and the director for the electromechanical installations at the local public water supply and sewage company were crucial for overcoming the challenges and leading to Grundfos winning the project.

The outcome
Now at the installation and testing phase, the solution is working as expected and the customer is happy with his choice of the Grundfos solution. There have been no clogging problems whatsoever, and service costs are therefore expected to be minimised. With more than a 30 % reduction in energy costs, the payback period has already started.  





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Topic:

Grundfos was up against a project specification that favoured a competitor and managed to present a solution that meets the requirements for efficiency, cost savings and environmental protection.

Location:

Maniakoi, Kastoria, West Macedonia - Greece

Company:

Teligioridis-Felekidis ATE

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The S-tube® impeller offers greater hydraulic efficiency than any other type of wastewater impeller, without compromising free passage and has been designed for today’s wastewater and tested to extreme levels.

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Contact

If you need a similar solution, please contact us for further information.

Contact

If you need a similar solution, please contact us for further information.