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Hookah for the steamer

15.10.2003

In the waters of the North and Baltic Seas, ships annually emit 1,3 million tons of smoke into the air.

The main air pollutants in the large port city of Hamburg are not cars, of which there are also many, but ships. Cleaning filters have been on the exhaust pipes of cars for more than a decade, but steamships and motor ships have begun to acquire filters only now.

The Canadian company DME International, originally specialized in brewing and pharmaceutical equipment, now produces filters for ship pipes. The action of the filter is based on the principle of a hookah: the smoke is passed through sea water in a special chamber that ensures complete mixing.

At the same time, 80 percent of soot and smoke particles, 90 percent of sulfur oxides and 70 percent of hydrogen chloride are absorbed. Exhaust noise is reduced by 35 decibels. The water is then filtered through layers of sand and activated carbon before being thrown into the sea. The dirt that has settled on the filter is delivered to the port and buried in a landfill.

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Biotechnologist Thomas Higgins from Canberra (Australia) transplanted bean genes into peas in order to ward off beetle larvae from peas, which feed only on them and do not digest beans.

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