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Raw water drawn in from the Kiel harbor basin was to be treated in such a way that it met the high purity requirements of marine biological and chemical experiments. At the same time, operational safety, corrosion protection and long-term operation with as little maintenance as possible were required.

1st suction station:

The raw water is sucked in from the harbor using an evacuation station with Venturi nozzle designed by ALMAWATECH. The suction lines are made of slotted PE pipe and are designed so that they can be lifted out of the water by crane and cleaned manually if necessary. This design ensures that long-term operation is guaranteed even in the event of fouling or deposits.

2. multi-stage filtration system ALMA FIL

In the first filtration step, the seawater enters a drum filter made entirely of corrosion-free PE. The microfiltration in the drum filter removes coarse and suspended solids and thus represents the first purification stage. The pre-treated water is then transferred to a stacking tank, which serves as a hydraulic buffer and enables the subsequent filtration stages to be fed evenly.

The main treatment takes place via sand filtration with the filter system ALMA FIL. The filters have a redundant pendulum design, are made of GRP and are equipped with a nozzle base and manhole. Backwashing can be controlled either by time or differential pressure. The redundancy ensures uninterrupted operation at all times, even during backwashing.

3. pigging station, insulation & trace heating

After filtration, the treated seawater is transported to GEOMAR via four 1.5 km long seawater pipes. At the transfer point, there is a valve island in an underground shaft and an intake station for further internal distribution. To prevent biological growth in the pipelines (e.g. algae or mussels), the pipelines are equipped with a pigging station. The pipes themselves are also insulated and fitted with trace heating to ensure temperature stability and frost protection.

4. automation

The control and automation technology is housed in a stainless steel control cabinet (V4A) and has a redundant design. It enables fully automated operation including process monitoring and offers remote access for system monitoring and diagnostics if required.