Abstract: The present invention relates to a fragrant air supplying method, supplying apparatus, and a building having a fragrant air supplying system for supplying fragrant air to the rooms. A fragrant-material supplying means supplies fragrant material to a mist-generating means to generate mist either by blowing air or by vibration produced by an ultrasonic-oscillating means. The mist is blown to a surface portion formed at the end of a fragrant-air separating means which separates evaporated fragrant air from mist. The fragrant air is then introduced into holes formed in a fragrant-air discharging means, in which the place of holes are offset from the surface portion toward the downstream of the fragrant air. The fragrant air is then blown into a distributing passage from the fragrant-air discharging means to mix the fragrant air with conditioned-air supplied by an air-supplying means.

Abstract: The present invention pertains to an ultrasonic fragrance generation apparatus for buildings, vehicles, aircraft, and the like, as well as for open areas. In particular it pertains to an ultrasonic fragrance generation apparatus by which means a suitable fragrance may be dispersed into the ambient air at a suitable time in the optimum concentration. By employing a material having increased surface area on the ultrasonic vibrating surface, it is possible with the present invention to generate a fragrant mist at an increased rate.

Abstract: A methane fermentation process for processing an evaporator condensate of a waste fluid from a pulp production system is disclosed. The process comprises the pre-treatment step of adding an acid into the evaporator condensate to settle and coagulate inhibitors for methane fermentation, removing the inhibitors, and thereafter neutralizing the waste fluid deprived of the inhibitors; and the fermentation step of allowing the effluent from the pre-treatment step to flow through a methane fermentation bio-reactor where the effluent undergoes fermentation to generate methane.