Patent ID: 6125841
Filing Date: 2000-10-03
Classification: B08B,F24C,Y10S

Abstract:
Exhaust hood for separating and biodegrading grease particles, and means for mounting said exhaust hood above a cooking unit, said hood including an exhaust fan to draw air loaded with grease produced by said cooking unit, into said hood, means mounted in said hood to separate grease particles contained in a swirling flow of air which circulates through said hood while allowing substantially clean air to be expelled through said exhaust fan, wherein said exhaust hood is associated with a supply of gas pressurized grease biodegrading bacteria consortia, a stationary injection device mounted in said exhaust hood and arranged for feeding said gas pressurized bacteria consortia into said swirling flow of air produced by said exhaust fan, said pressurized bacteria consortia contacting said grease particle separating means as a result of centrifugal effect, duct means connecting said supply of gas pressurized grease biodegrading bacteria consortia to said injection device, and control means effective to provide predetermined amounts of gas pressurized grease biodegrading bacteria consortia to said injection device, and to cause feeding of shots of bacteria consortia exclusively into said swirling flow of air when temperature inside said exhaust hood has reached a value within a range between about 10 and about 80.degree. C., and while said exit fan is still in operation, and to allow said biodegrading bacteria consortia to contact said separating means to biodegrade and substantially disintegrate grease particles that may adhere thereto after said exhaust fan has ceased to operate without use of pressure or scrubbing.