In a method and an apparatus for aerobic fermentation of biodegradable refuse to produce an odorless organic fertilizer, the apparatus includes an air blower and an air sucker each comprising a plurality of horizontal cross air pipes and pendant air line members arranged in horizontally spaced relation...http://www.google.es/patents/US5116760?utm_source=gb-gplus-sharePatente US5116760 - Apparatus for manufacture of organic fertilizers
