Scandlines has used a new scrub water treatment system on the exhaust gas cleaners of its new ferries – leading to substantial cost savings.
Scandlines’ two recently launched ferries for the Rostock-Gedser route are driven by hybrid propulsion systems but have also been fitted with closed-loop scrubbers. A mixture of water and sodium carbonate in powder form, which is pumped aboard the ferries, scrubs the exhaust gas. Contaminated water from the scrubber is channelled to an onboard separator for purification. When the solution cannot absorb more waste products, the scrub water is pumped into the shore-based scrub water treatment system MarinePaq, produced by the Luxembourg clean-tech company Apateq.
The system has been installed in two containers stacked one on top of the other at the harbour in Gedser. In a five-step process, the scrub water treatment system cleans the scrub water, which can then be discharged into the harbour “according to the most stringent environmental legislation, being substantially beneficial for the environment”, said Scandlines.
By operating the MarinePaq on shore, “Scandlines may save expensive water disposal costs for hauling the scrub water to the nearest industrial wastewater treatment facility. The shipping company is also not dependent on the availability of external water disposal providers, thereby saving time and gaining flexibility,” said Scandlines.
Scandlines claims that the onshore treatment of MarinePaq also achieves a “much higher quality of purification than any other existing scrub water treatment system, such as the ones offered for onboard applications. Heavy metals, COD, nitrite, sulphites and nitrates are being reduced to much lower levels than any other solution currently implemented. As a result, Scandlines may count on an infrastructure that is capable of facing toughening and constantly evolving regulations”.
Scandlines took over the facility at the end of May.