Abstract
The discharge into the sea of chemical substances or tank washings contains such substances should be prohibited to protect marine environment from pollution produced by ships. Using much water to wash the tank is a burden to a shipping service and it needs heavy cost and much fuel for the incineration. Therefore a method of the reduction of the wash water is considered. The washing with a water jet is studied experimentally. As the result, the relation the wash water quantity and the content of the residue in washing discharge is obtained. When the angular velocity of water jet nozzle is 41° and the water pressure is low, the quantity of washing water can be reduced.
