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Innsbruck-based company puts faith in XL hybrid lifting station

medical product handling company Tirol GmbH
(Fig. 1) A hybrid lifting station was installed in the grounds of the medical product handling company Tirol GmbH in December 2014.

The alternative to a classical lifting station reliably discharges the wastewater of the medical product handling company Tirol GmbH

For commercial operations, it is always important that wastewater is discharged reliably to the sewage system without any interruptions in operation caused by power failures or backwater. The medical product handling company Tirol GmbH (Fig. 1) has decided in favour of a modern solution: the hybrid lifting station Ecolift XL manufactured by KESSEL. The new system was installed in just one day in December 2014.

Using natural gradient

(Fig. 2) The alternative to a classical lifting station: Ecolift XL.

Since August 2013, reusable medical products have been cleaned, disinfected, checked, packed and sterilised and then dispatched to customers by the medical products handling company Tirol GmbH located in Zirl, west of Innsbruck, Austria. Up until December 2014, this building did not have any production-maintaining backwater protection measures installed which could have allowed production to continue even in the event of backwater. When the decision was taken to optimise this situation, the project team Tilak B+T/TB SPIEGLTec looked for an alternative to conventional lifting stations.

The solution was found at KESSEL AG. “Hybrid lifting stations can be used where there is a gradient to the sewer, and result in significant savings in operation and maintenance costs compared with classical lifting stations,” Patrick Hörhager says. Hybrid lifting stations such as the Ecolift XL (Fig. 2) use direct drainage, the gradient to the sewer (Fig. 4). A motor-driven flap only closes during backwater; in this case the wastewater is pumped via a pressure pipe with backwater loop into the sewer (Fig. 5). This allows drainage points below the backwater level to be used even during a backwater phase, because the wastewater is pumped against the backwater into the sewer.

(Fig. 4) During normal operation the wastewater flows to the sewer on account of the gradient, without energy having to be used. This guarantees wastewater discharging during a power failure.
(Fig. 5) Reliable even in backwater: in the event of backwater the automatic closure system closes and the wastewater which occurs is pumped to the sewer via a pressure pipe.

Pre-condition for trouble-free operation

For a hybrid lifting station to work smoothly, only a few pre-conditions have to be met. Firstly, a gradient to the sewer is required so that wastewater is drained directly in normal operation. Then professional installation is crucial for problem-free operation. In addition, ventilation and the inlet pipe must be routed correctly.

Safe and economical

“The way the hybrid lifting station works saves costs for the operator and goes easy on the environment, because pumping is a rare occurrence – the system only uses power in the case of backwater and once a month during self-diagnosis. In addition, the system guarantees that wastewater is discharged reliably even in the event of a power failure,” Hörhager explains. Whereas a classical lifting station cannot pump the wastewater to the sewer in such a case, the hybrid lifting station makes use of the gradient and the wastewater flows into the sewer within the aid of expensive energy. Furthermore, a hybrid lifting station provides reliable protection from backwater just like a classical lifting station: hybrid lifting stations have a pressure pipe with backwater loop through which the wastewater is pumped into the sewer in the event of backwater. The backwater loop ensures that no water can flow back from the sewer into the building during backwater. Thus the building is protected from damage caused by backwater without a pump having to run all the time.

´Fast installation despite high groundwater table

It only took one day to install the Ecolift XL outside the building in a polymer chamber integrated in the ground. “The low weight of the polymer chamber meant it was quickly assembled and installed. The high groundwater table did not cause any problems either,” the project team said. The chamber withstands groundwater up to a height of three metres from the base of the chamber. After the pit had been excavated for the system, the engineering module with welded chamber ring was inserted and connected to the drainage pipe (Fig. 6). Then the chamber module was fixed in place (Fig. 7), the recess around the chamber was filled and compacted, the upper section fitted and adapted to the required height. “Installation went extremely smoothly thanks to the good consultation by the KESSEL employees and straightforward assembly,” the project team explained.

(Fig. 6) During installation the engineering chamber of the hybrid lifting station was positioned in the assembly and connected first.
(Fig. 7) The chamber module was fitted to the welded chamber ring of the engineering module. The entire installation work was completed within a single day.

Project data and facts

Client:

Tiroler Landeskrankenanstalten GmbH
Project Manager for Building Technology: Ing. Patrick Hörhager
Maximilianstraße 35
6020 Innsbruck, Austria

Construction work:

Strabag AG
Günther Hofer
Sterzinger Straße 1
6020 Innsbruck, Austria

Planning:

SPIEGLtec GmbH
consulting engineers
Projektleiter: Hannes Messner
Niederfeldweg 9a
6230 Brixlegg/Tirol, Austria

Products used:

Ecolift XL

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