抄録
We aimed to develop a system for treating emulsified oil discharged from ship engine rooms. The efficiency of the system aimed at reducing the oil content of the drain to 15ppm or less so that the drain might be discharged into the sea. We have succeeded in developing a biological treatment system using the fluidized bed in which the drain and sludge are efficiently mixed by aeration and stirring. The specific sludge with enhanced oil decomposing ability is used in the system. We performed on-shipboard tests using a pilot test system, whose capacity of the reaction chamber is 0.5m3 and oil volume load, 0.4kg-oil/m3/d, and have confirmed future possible applications to the treatment system for ships. This would bring great reduction in loads on the existing oil separator, saving its maintenance cost in general.
