Abstract: A method for treating a gas liquor to remove polluting substances with a stable treating efficiency and at a high rate which comprises the steps of(A) pre-treating a gas liquor discharged from a quenching of coke oven gas, the gas liquor containing ammonia, phenols, thiocyanate compounds, cyanide compounds, suspended solids and oils, to reduce the ammonia content of the gas liquor to about 1,000 ppm or less;(B) subjecting the gas liquor from step (A) to a first biological treatment comprising treating the gas liquor treated in step (A) with microorganisms,(C) subjecting the gas liquor from step (B) to a second biological treatment comprising treating the gas liquor treated in step (B) in an aerating tank including a mixture of suspended solids comprising powdered activated carbon and activated sludge mixed with the gas liquor, and(D) adding an iron salt to the gas liquor from step (C) to cause coagulation and sedimentation.

Abstract: An apparatus for producing well-fermented compost by achieving an aerobic fermentation of organic wastes, excretion, etc. The apparatus comprises a fermentation vessel of a rectangular configuration, a device for feeding slurry-like organic wastes within the base compost which has been piled in the vessel and for stirring the base compost and the slurry-like organic wastes, and a device for gathering an upper portion of the predetermined thickness of the fermented compost and for carrying the gathered compost out of the vessel. These devices are movably positioned on the top of the vessel.

Abstract: A remote-control maneuvering apparatus for a ship having two sets of Z type propelling apparatus, comprising a maneuvering handle adapted to be inclined at any angle about a predetermined point and to be moved in its longitudinal direction, ahead and astern, switching transmitting apparatus adapted to issue signals for switching going ahead and astern in accordance with the travel distance of the handle in one of two components the sum of which constituting the angle of inclination of said handle, steering transmitting apparatus adapted to issue signals for steering the ship to port or starboard side in accordance with the travel distance of the handle in another component, and speed and clutch engaging and disengaging transmitting apparatus adapted to issue signals for controlling the speed of the engines as well as engaging and disengaging the clutch in accordance with the movement of said handle in the longitudinal direction thereof.

Abstract: A twin-shaft Z type propelling arrangement for a tug boat comprises a variable slip transmission, such as a friction clutch provided between the main engine and the Z type propelling mechanism of the boat, and a mechanism for providing variable amount of slip for the transmission mechanism at the minimum speed operation of the engine.